Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
FEASIBILITY OF USING HIGHLY COLD AIR IN AIR CONDITIONING IN RIYADH
1
21
38932
10.21608/amme.2008.38932
EN
ZEITOUN O.
M.
Associate Professor, Mech. Eng. Dept., College of Engineering, King Saud University Riyadh, Saudi Arabia.
Journal Article
2019
07
04
ABSTRACT<br />The feasibility of using highly cold air in air conditioning systems in Riyadh City was<br />investigated. Computational fluid dynamics technique was used to study air<br />distributions inside rooms for moderate and highly cold air supply systems. The<br />current investigation was conducted under the real conditions represent air<br />conditioning loads and weather in Riyadh city in the Kingdome of Saudi Arabia.<br />Comparisons between comfort levels under different supply air temperature from 5<br />oC (highly cold) to 15 oC (classical system) were conducted. The comparison<br />indicated that using highly cold air system can improve air quality and comfort<br />conditions inside air-conditioned spaces in Riyadh City.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
NUMERICAL HYDRODYNAMIC AND THERMAL BEHAVIORS IN A CHANNEL WITH ATTACHED AND DETACHED RIBS
22
30
38934
10.21608/amme.2008.38934
EN
KANOUN
M.
PhD Student, Computational Fluid Dynamics and Transfer Phenomena Unit, Dept. of
Mechanical Eng., National school of engineering of Sfax (ENIS), University of Sfax, Tunisia.
BACCAR
M
Professor, Computational Fluid Dynamics and Transfer Phenomena Unit, Dept. of
Mechanical Eng., National school of engineering of Sfax (ENIS), University of Sfax, Tunisia.
MSEDDI
M
Professor, Faculty of Science, University of Sfax, Tunisia.
Journal Article
2019
07
04
ABSTRACT<br />A numerical investigation has been undertaken to study fluid flow and heat transfer<br />through channels roughened by arrays of either attached or detached ribs. This<br />technique is spilled extensively in the internal cooling. Indeed, the heat transfer<br />enhancing ribs are widely used in many industrial applications such as the cooling of<br />gas turbine blades, and heat exchangers. Calculations are carried on five geometric<br />configurations. The governing equations are solved in a two-dimensional domain using<br />a control volume method and the SIMPLE algorithm for the velocity-pressure coupling<br />is employed. The rib height-to-channel hydraulic diameter, detached distance-to-height<br />ratio, pitch-to-height ratio, Reynolds and Prandtl numbers are respectively fixed at<br />h=0.2, C=0 and C=0.5, p=10, Re=500 and Pr=0.71. The grid is non uniform and is<br />highly concentrated close to the rib to capture high gradient velocity, pressure and<br />temperature. A uniform temperature through the ribs and all walls was assumed. The<br />interaction between the hydrodynamics and thermal structures is put in evidence.<br />Geometrical configurations effect on flow and heat transfer has been detailed by a<br />systematic analysis. From the local results carrying on the temperatures pattern, the<br />profiles of the local Nusselt number in channel is presented for different geometrical<br />configurations.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
AIR FLOW PATTERNS IN AN AIR CONDITIONED MEASURING EQUIPMENT LABORATORY
31
47
38941
10.21608/amme.2008.38941
EN
FARAG A.
M.
Egyptian Air Force.
KHALIL E.
E.
Mechanical Power Engineering Department , Faculty of Engineering, Cairo University, Cairo, Egypt.
MORKOS S.
M.
Mechanical Power Engineering Department , Faculty of Engineering, Cairo University, Cairo, Egypt.
Journal Article
2019
07
04
ABSTRACT<br />Calibration for the measuring instruments in the Air Force Measuring Equipment<br />Laboratories, are considered to be one of the reasons for flight success in Egyptian Air<br />Force. Hence, they should be preserved from the different factors that might cause<br />harm or decrease the accuracy in calibration for the measuring instruments. One of<br />these factors is the excessive relative humidity as it affects the mechanical and physical<br />properties of the standard instruments that are considered the reference. Measuring<br />instruments need to be calibrated from time to time to provide high accuracy in use that<br />occurs by comparing a measuring device (uncalibrated) against an equal or better<br />standard.<br />The present paper focuses on the heat transfer interactions on the air flow in Precision<br />Measuring Equipment Laboratories (PMEL). Many PMELs built or renovated in recent<br />years have not met minimum operating environment standards. The impact of flow<br />parameters on the air flow pattern were investigated. This offers the designer a better<br />view of design limits to enable him to adequately select the optimum design from a wide<br />number of alternative options and to use them in forecasting and even monitoring. Air<br />movement inside enclosures prediction via CFD is a strong tool for reaching better<br />designs for inlets and outlets positions in ventilated spaces. Fluent Computational<br />Software [1] was used to predict the parameters affecting the air distribution inside airconditioned<br />spaces. Continuity, momentum, energy, and species transport equations in<br />addition to k-epsilon model equations for turbulence closure were solved using finite<br />volume method. Furthermore the paper includes full-scale actual existing space<br />experiments, to obtain good documented full-scale measurements in actual ventilated<br />laboratory room that can be used for comparison with CFD-simulations.<br />Many of the reported comparisons were found in good agreement with experiments and<br />aided the assessment of the numerical procedure application to air-conditioned spaces.<br />Finally, it was found that the optimum airside system design should allow the air to pass<br />all the enclosure areas before being extracted. Temperature and humidity control are<br />crucial elements of laboratory design. Since temperature fluctuations also affect<br />humidity, its control is especially important. Also a restriction should be made for the<br />mechanical and optical disciplines, the internationally accepted temperature is not<br />exceed 20°C.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
APPLICATION OF CFD TECHNIQUE FOR ASSESEMENT OF ROAD TUNNEL VENTILAION
48
66
38946
10.21608/amme.2008.38946
EN
HAMAD S.
Y.
Syrian Armed Forces.
IBRAHIM A.
G.
Egyptian Armed Forces.
ELSHAMARKA S.
E.
Egyptian Armed Forces.
Journal Article
2019
07
04
ABSTRACT<br />The most recent technique to study the behavior of tunnel ventilation is computational fluid<br />dynamics (CFD). This approach is capable of modeling the multi-dimensional, obstructed<br />and non-obstructed tunnels of arbitrary geometry. This paper addressed the methodology<br />improvement for the design of ventilated road tunnels using CFD technique. A<br />comprehensive CFD simulation has been carried out to examine the velocity, pressure and<br />temperature distributions in the main scenario of tunnel ventilation in case of normal and<br />halted traffic. The predicted results are used to enhance the design and evaluate the<br />ventilation system capability to fulfill the required thermal environment inside the tunnel.<br />The base design of tunnel ventilation system was modified to avoid the unsafe regions in<br />the tunnel where the effects of carbon monoxide (CO) are hazard.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
UTILIZATION OF NANOCRYSTALLINE DIAMOND POWDER IN RUBBER COMPOUNDS AS A NOVEL REINFORCING MATERIAL
1
7
38948
10.21608/amme.2008.38948
EN
POLAT
S.
Assist. Prof . Dr, Dpt. of Metallurgical and Materials Engineering, Kocaeli University,
Turkey.
KARAGOEZ
S.
Prof. Dr.,Dpt. of Metallurgical and Materials Engineering, Kocaeli University, Turkey.
Journal Article
2019
07
04
ABSTRACT<br />Nano scaled materials have improved mechanical properties compared to the<br />conventional ones due to their extremely large surface areas. Nano silicon carbide,<br />nano zinc oxide, nano clays, nano starch and nano alumina can be named among<br />many others. The nanocrystalline diamond powder used in this study as rubber<br />reinforcing material has been synthesized by explosive detonation, a method that<br />gained importance since the mid 1980s. Free carbon atoms are released when an<br />explosive deficient in oxygen, usually a TNT/RDX (trinitrotoluene/hexogene) mixture, is<br />detonated in a preservative material. Nano-sized diamond crystallites are formed by<br />coagulation and rearrangement of these carbon atoms under the high temperature and<br />high pressure condition produced by the detonation reaction. Diamond powder<br />synthesized by explosive detonation has a particle size in the range 1-15 nm. It is well<br />known that particle size of a filler must be lower than 100 nm in order to have a<br />reinforcing effect in rubber compounds. Thus, nanocrystalline diamond powder has a<br />great potential, as a rubber reinforcing material, provided that it is well dispersed and<br />can be attached to the polymer molecules. In the present study diamond powder is<br />added to a rubber formulation used on tank pallets at varying phr (parts per hundred<br />parts of rubber, by weight) values. The change in physical and mechanical properties of<br />the compound has been investigated and considerable improvement is observed in<br />abrasion resistance even at low phr levels.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
FABRICATION OF MAGNESIUM ALLOY FROM A PRE-ALLOYED POWDER USING HOT DIE COMPACTION PROCESS
8
17
38952
10.21608/amme.2008.38952
EN
ZULKOFFLI
Z.
Graduate student, Dept of Mechanical and Materials Engineering, National
University of Malaysia.
DAUD M.A.
M.
Graduate student, Dept of Mechanical and Materials Engineering, National
University of Malaysia.
SYARIF
J.
Lecturer, Dept of Mechanical and Materials Engineering, National University of
Malaysia.
SAJURI
Z.
Lecturer, Dept of Mechanical and Materials Engineering, National University of
Malaysia.
Journal Article
2019
07
04
ABSTRACT<br />AZ91D magnesium alloy was fabricated by using pre-alloyed powder compressed<br />without any binder agent at 280oC under the compaction pressure of 200 MPa at<br />different time intervals of 2, 4, 6, 8 and 10 hours. Some of the compressed samples<br />were then undergone a sintering process at temperature of 450oC for 3 and 6 hours.<br />Furnace cooling was performed after the sintering. Microstructure and hardness of each<br />specimen were investigated. The microstructures observation and hardness<br />investigation of the as-hot compacted and sintered samples were then compared. The<br />results showed that microstructure transformation occurred due to the hot compaction<br />and the sintering for 3 and 6 hours. The as-hot compacted samples showed a grown<br />globular precipitates (β phase, Mg17Al12) distributed uniformly in grains. However, after<br />sintering process, lamellar precipitates took place and dominated the grains. The as-hot<br />compacted sample showed higher hardness value compared to the 3 hours and 6 hours<br />sintered samples.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
CARBON-POLYMER NANOCOMPOSITE ON BASE OF NANOFIBER TEXTILE PRODUCED BY NANOSPIDER METHOD
18
25
38955
10.21608/amme.2008.38955
EN
ROŻEK
Z.
PhD student, Dpt. of Mater. Sc. and Eng., Technical University, Liberec,
Czech Republic.
KACZOROWSKI
W.
PhD, Dpt. of Mater. Sc. and Eng., Technical University, Lodz, Poland.
LUKÁŠ
D.
Professor, Dpt. of Nonwovens., Technical University, Liberec, Czech Republic.
LOUDA
P.
Professor, Dpt. of Mater. Sc. and Eng., Technical University, Liberec,
Czech Republic.
MITURA
S.
Professor, Dpt. of Mater. Sc. and Eng., Technical University, Lodz, Poland.
Journal Article
2019
07
04
ABSTRACT<br />Due to specific properties of carbon coatings, they have been used in a lot of<br />applications for many years. Plotted on the substrate they mainly fulfill protective<br />function. Currently a lot of attention is dedicated to carbon coatings produced on<br />polymer substrate. In this case plasma enhanced CVD methods play a very important<br />role. Using these methods makes carbon coatings synthesis possible in lower<br />temperature.<br />Carbon coatings have been plotted on to polymer substrate [poly (vinylalcohol) (PVA),<br />polyurethane (PUR)], by Microwave Radio Frequency Plasma Assisted Chemical<br />Vapour Deposition (MW/RF PA CVD) method. Plasma has been aroused in pure a<br />methane atmosphere. Nanofiber textile has been used as the substrate produced by<br />modern Nanospider method. The Nanospider is the modification of the electrospinning.<br />Nanocomposite obtained in this way was characterized by the contact angle studies.<br />The nanocomposite structure was analyzed by scanning electron microscope (SEM).<br />The results of investigations are presented.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MORPHOLOGICAL CONTROL OF SINGLE CRYSTALLINE SILICON NANOWIRES AT NEAR-ROOM TEMERATURES
26
36
38962
10.21608/amme.2008.38962
EN
CHEN
C-Y
Department of Materials Science and Engineering, National Tsing Hua University
Hsinchu, 300, Taiwan (R. O. C.).
WU
C-S
Department of Materials Science and Engineering, National Tsing Hua University
Hsinchu, 300, Taiwan (R. O. C.).
CHOU
C-J
Department of Industrial Engineering and Engineering Management, National Tsing
Hua University, Hsinchu, 300, Taiwan (R. O. C.).
YEN
T-J
Department of Materials Science and Engineering, National Tsing Hua University
Hsinchu, 300, Taiwan (R. O. C.).
Journal Article
2019
07
04
ABSTRACT<br />By using a statistic electroless metal deposition (SEMD) method, here we report the<br />morphological controllability of single crystalline silicon nanowires (SiNWs) with respect<br />to their orientations, diameters, and lengths. The growth axis of single crystalline<br />SiNWs on three oriented Si wafers- (100), (110) and (111)- is the [100] direction.<br />Furthermore, the consistent results examined based on the arrays of SiNWs evidently<br />indicate that the [100] direction is the preferential axial orientation of fabricated SiNWs<br />in all cases. Notice that our observation is different from the previous reports, and such<br />a corresponding formation mechanism of anisotropic SiNWs can be successfully<br />elucidated by both lattice configuration of oriented Si surfaces and the passivation<br />effect on the H-terminated planes. Next, the diameter control of SiNWs is achieved by<br />employing the Taguchi methods, proving the capability of controlling the diameter with<br />narrow distribution and comprehension of the influences from all process factors. The<br />length of SiNWs presents fast and linear dependence with the immersion time. In<br />addition to the morphological control of SiNWs, our statistic EMD technique provides<br />further advantages such as almost room-temperature operation and catalyst/dopant<br />free, paving a way towards the implementation of SiNWs in nanoelectronics, nanoscale<br />optoelectronics, nano-electro-mechanical systems, and biological detection.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EFFECT OF HIGH TEMERATURE TREATMENT ON THE PROPERTIES OF CORDIERITE- ZIRCONIA NANOCOMPOSITES
37
49
38964
10.21608/amme.2008.38964
EN
AWAAD
M.
National Research Centre, Cairo, Egypt.
KENAWY S.
H.
National Research Centre, Cairo, Egypt.
NAGA S.
M.
National Research Centre, Cairo, Egypt.
Journal Article
2019
07
04
ABSTRACT<br />Pure cordierite and cordierite - ZrO2 composites containing 10, 20 and 30 wt% Y2O3<br />stabilized ZrO2 have been prepared by dispersing ZrO2 powder in cordierite sol. The<br />evolution of crystalline phases and the microstructure have been studied using X-ray<br />diffraction and scanning electron microscopy. It was found that increasing both ZrO2<br />content and firing temperature enhanced the bodies' density. Mullite net and rods<br />crystallize in the composite matrix when it heat treated at 1450°C. The beneficial effects<br />of mullite and ZrO2 on the bending strength of the fabricated composites have been<br />described.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EFFECT OF LOW VELOCITY IMPACT DAMAGE ON COMPOSITE PLATES
1
8
38971
10.21608/amme.2008.38971
EN
YAPICI
A.
Assistant professor, Dpt. of Mechanical Eng., Selcuk University, Konya, Turkey.
METIN
M.
Graduate student, Dpt. of Mechanical Eng., Selcuk University, Konya, Turkey.
UYANER
M.
Assistant professor, Kadinhani Faik Icil Vocational School, Selcuk University,
Konya, Turkey.
KARA
M.
Lecturer, Kadinhani Faik Icil Vocational School, Selcuk University, Konya,
Turkey.
ESKIZEYBEK
V.
Research Assistant, Dpt. of Mechanical Eng., Selcuk University, Konya, Turkey.
Journal Article
2019
07
04
ABSTRACT<br />In this study unidirectional E-glass/epoxy composite plates were tested. The panels<br />were cut into specimens of 140x140 mm in dimension with an average thickness of 3<br />mm and stacking sequence of [+45/-45/90/0]2s The impact tests performed with<br />impactor mass (18 kg) at five different impact velocities (2.0, 2.5, 3.0, 3.5 and 4.0 m/s)<br />were conducted with a specially developed vertical drop weight testing machine. The<br />diameter of the impactor with a hemispherical nose was 24 mm. The center of each<br />plate was exposed to impact loading. The differences in the impact responses of<br />specimens with varying impact velocities are characterized.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
PULSED GASEOUS DETONATION GUNS FOR COATING DEPOSITION
9
20
38975
10.21608/amme.2008.38975
EN
KHARLAMOV Y.
A.
Professor, Dpt of Mech. Engineering, Ghulam Ishaq Khan Institute of Engineering
Sciences and Technology, Topi, Pakistan.
KHARLAMOV M.
Y.
Associate professor, Dpt. of Computer Sciences, Vladimir Dalh East Ukrainian
National University, Lugansk, Ukraine.
Journal Article
2019
07
04
ABSTRACT<br />This paper is devoted to recent accomplishments in basic and applied research on<br />gaseous detonation guns for thermal spraying. The conditions of processing powder<br />materials are governed by the thermal, velocity, and chemical relaxation of particles in a<br />high-temperature two-phase pulsed stream generated at every working cycle of the<br />gaseous detonation guns (GDG). The relaxation of particles is conditioned by the<br />parameters of the entire system under consideration and depends not only on the<br />energy of a single pulse and the parameters of the high-temperature gaseous medium,<br />but also on the spatial arrangement of a fresh gas charge and a single dose (metered<br />amount) of powder. The classification and design concepts of detonation guns are<br />discussed. The possible versions of D-guns operation cycle are described. The better<br />understandings of knowledge of the involved phenomena are necessary for<br />improvement of the design of gaseous detonations guns.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
IMPACT DAMAGE PREDICTION IN SHELL STRUCTURES
21
32
38980
10.21608/amme.2008.38980
EN
El-FARRAN M.
M.
Ph.D. Student in Aircraft Structure, Department Of Aerospace Engineering, Cairo
University.
ABUELFOUTOUH N.
M.
Professor of Aircraft Structures, Department Of Aerospace Engineering, Cairo University.
NEGM H.
M.
Professor of Aircraft Structures, Department Of Aerospace Engineering, Cairo University.
Journal Article
2019
07
04
ABSTRACT<br />This paper describes a method for predicting how much impact kinetic energy is<br />needed to deform, penetrate, and perforate a shell structures. This method based on<br />strain rate effects, non linear materials, and cross section area reduction. An explicit<br />finite element solver was developed to investigate the relationship between the<br />impactor and target under different impact load cases. The study shows that the<br />impactor can deform, penetrate, and perforate the structure depending on the shape,<br />and the velocity of the impactor besides the material properties of both the impactor<br />and the structure. This paper considers a shell structure response subjected to rigid<br />spherical impactor with a fixed weight at different impact speeds ranging between 10<br />m/s to 150 m/s.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
DYNAMICS AND STABILITY OF GUN-BARRELS WITH MOVING BULLETS
33
46
38981
10.21608/amme.2008.38981
EN
WAGIH
A.
Egyptian Air-force, Cairo, Egypt.
ALADIN
M.
Modeling and Simulation in Mechanics, German University in Cairo.
TAWFIK
M.
Mechanical Engineering Department, British University in Egypt, Cairo, Egypt.
NEGM H.
M.
Aerospace Engineering Department, Cairo University, Cairo, Egypt.
Journal Article
2019
07
04
ABSTRACT<br />In this study, the stability of a Timoshenko beam under the effect of a moving projectile<br />will be reintroduced using simple eigenvalue analysis of a finite element model. The<br />eigenvalues of the beam change with the mass, speed, and position of the projectile,<br />thus, the eigenvalues are evaluated for the system with different speeds and masses at<br />different position until the lowest eigenvalue reaches zero indicating the instability<br />occurrence. Then the dynamics of the beam will be investigated using the Newmark<br />algorithm at different values of speed and mass ratios. It is concluded that the<br />technique used to predict the stability boundaries is simple, accurate, and reliable.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
A SURVEY ON THE STRUCTURAL FAILURE ANALYSIS DUE TO IMPACT
47
73
38984
10.21608/amme.2008.38984
EN
IBRAHIM M.
A.
Egyptian Armed Forces.
YOUNES M.
M.
Egyptian Armed Forces.
Y. I.
EL-SHAER
Egyptian Armed Forces.
Journal Article
2019
07
04
ABSTRACT<br />This paper reviews the recent researches in relation to the penetration and/or<br />perforation of metallic and composite target materials. The present survey deals with<br />targets impacted by projectiles travelling at intermediate velocity regime. The<br />deformation domain of various structural targets was mostly localized and existed within<br />a small region of 2-3 the projectile diameter. Recent years have a wide range of<br />significant experimental investigations related to the projectile-target configurations.<br />Although most of the work done have been concerned with the normal impact on<br />monolithic materials by using non-deformable projectiles, valuable examinations were<br />carried out on the inclined impact. Furthermore, impact performed by using deformable<br />projectiles was surveyed on non-homogeneous materials and composites included<br />laminated targets. It was found that through-the-thickness reinforcements enhanced the<br />ballistic resistance of the ceramic armours.<br />The analytical developments enabled to predict the important characteristics of the<br />penetration and/or perforation process were reviewed. These simulations are able to<br />model the local failure modes and the global deformations of various target geometries.<br />In particular cases, when both the local and the global deformation mechanisms were<br />acted in an irregular behaviours during the target collapse, the ordinary models were<br />incapable of predicting accurately the target response and more complicated models<br />were strongly recommended. The common numerical codes mostly used in the<br />simulation of the structures under impact are briefly reviewed and their capabilities and<br />limitations are deeply discussed.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
NON-LINEAR FORCED VIBRATION OF A TAPERED CANTILEVER BEAM
1
11
38988
10.21608/amme.2008.38988
EN
AL-QAISIA A.
A.
Department of Mechanical Engineering, Faculty of Engineering and Technology, University,
of Jordan, Amman, Jordan.
ABDEL-JABER M.
S.
Department of Civil Engineering, Faculty of Engineering and Technology, University of
Jordan, Amman, Jordan.
Journal Article
2019
07
04
ABSTRACT<br />This paper presents a study on the nonlinear frequency response of a tapered<br />cantilever beam. The mathematical model is developed based on the large deformation<br />theory, nonlinear curvature and with the constraint of inextensible beam. The<br />Lagrangian dynamics with the assumed mode method is utilized in deriving the nonlinear,<br />uni-modal temporal equation of motion. The non-linear equation of motion is<br />solved analytically using the harmonic balance method (HB). Results were obtained for<br />tapered beams with different values of taper ratio. The effect of taper ratio and<br />excitation level on the qualitative behaviour of the forced response of the beam were<br />studied and presented the first three modes of vibration.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
VIBRATION BEHAVIOR OF THE ROTOR WITH TRANSVERE CRACK WITH SOME COMMENTS ON CRACK DETECTION
12
22
38990
10.21608/amme.2008.38990
EN
METWALLY H.
M.
Professor of Mechanical Engineer, Alexandria University, Egypt.
MORSI
E.
Assistant Professor of Mechanical Engineer, Alexandria University, Egypt.
BADAWY M.
H
Mechanical engineer, Alexandria University, Egypt.
Journal Article
2019
07
04
ABSTRACT<br />The present work deals with crack behavior, detection, analysis, determination and<br />diagnosis of cracked rotors. Crack detection is very important for any rotating machine.<br />It can save all the rotating parts like blades, impellers, fans and bearings.<br />Crack behavior arises up non-linear differential equations that include the most<br />influence of stiffness change. The nonlinear differential equations are solved by a<br />computer program to calculate reduction in stiffness due to crack. The theoretical<br />solution and calculations of stiffness reduction for rotor suspension systems was carried<br />out.<br />Programming software to predict the crack spectrum time wave form, run-up and costdown<br />amplitude verse rotating speed, and the difference of natural frequency due to<br />crack behavior unbalance amount, eccentricity and angles.<br />The experimental work is helpful to assure the correctness of theoretical work, so<br />constructing a test rig that simulates our problem has to be done. The experimental<br />analysis is used to predict the cracked shaft and the change in crack stiffness. Run-up<br />and cost down method is used for directly predicting the cracked shaft by monitoring<br />the shift of frequency for critical speed.<br />The conclusion of the results show that, crack affects the natural frequency of the shaft<br />and its stiffness which in turn has an effect on all vibration characteristics. The<br />theoretical results show sub-harmonics and harmonics of rotating shafts according to<br />speed, how the crack affects the natural frequency and the great effect of changing the<br />phase angle and how it can be used for correction the crack effects.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
VIBRATION SOURCE ESTIMATION INSIDE OF MACHINERY
23
33
38993
10.21608/amme.2008.38993
EN
FOULADI M.
H.
PhD Candidate, Dep. of Mech. Eng, Faculty of Eng., Universiti Kebangsaan Malaysia.
NOR M.J.
M.
Professor, Dep. of Mech. Eng, Faculty of Eng., Universiti Kebangsaan Malaysia.
ARIFFIN A.
K.
Professor, Dep. of Mech. Eng, Faculty of Eng., Universiti Kebangsaan Malaysia.
ABDULLAD
S.
Assoc. Professor, Dep. of Mech. Eng, Faculty of Eng., Universiti Kebangsaan Malaysia.
Journal Article
2019
07
04
ABSTRACT<br />In this paper, signal processing is integrated with inverse techniques to solve inverse<br />problem for internal parts of machinery in which, sources are unknown and<br />inaccessible. Explosions of an internal combustion engine produce powerful pulses of<br />energy which cause the engine vibration as a response. Attenuation of engine vibration<br />is one of the important problems for NVH engineers. Engine vibration can affect the<br />whole chassis vibration and interior noise level. Engine vibration is the dominant source<br />of noise emissions (less than 200Hz) inside the vehicle compartment. In this research,<br />inverse techniques are implemented to estimate unknown amount of vibration sources.<br />Tikhonov regularization carried out to stabilize solution of ill-posed problem. L-curve<br />method is also utilised to find the regularization parameter.<br />In comparison with transfer path analysis, this method doesn’t need to separate the<br />observation part from the system. Despite the coherence based methods, it is practical<br />in low frequency analysis of engine with missing inputs and outputs.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
VIBRATION CHARACTERISTICS OF PERIODIC SANDWICH BEAMS
34
48
38995
10.21608/amme.2008.38995
EN
BADRAN
H.
Egyptian Air-force, Cairo, Egypt.
TAWFIK
M.
Mechanical Engineering Department, British University in Egypt, Cairo, Egypt.
NEGM
H.
Aerospace Engineering Department, Cairo University, Cairo, Egypt.
Journal Article
2019
07
04
ABSTRACT<br />Periodic Structures have been in the focus of research for their useful characteristics<br />and ability to attenuate vibration in frequency bands called “stop-bands”. In the previous<br />studies, periodic changes in the geometry of beams were introduced to create the<br />periodicity; then the vibration characteristics were studied accordingly. In this study, for<br />the first time, we are analyzing the vibration characteristics of a sandwich beam with the<br />periodic change in the sandwich material. The new technique preserves the external<br />geometry of the beam structure and depends on changing the material of the sandwich<br />material. The periodic analysis and the vibration response characteristics of the model<br />are investigated using finite element model for a sandwich beam. The response to<br />bending excitation has shown promising results for periodic sandwich beams, that may<br />encourage further study of the problem with more practical configurations.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
USING MULTIVARIATE LATENT MODELS TO MONITOR A PRINTING MACHINE AND PREDICT MACHINE FAILURE
49
62
38997
10.21608/amme.2008.38997
EN
SAID E.
M.
Egyptian Armed Forces.
HUSSEIN W.
M.
Egyptian Armed Forces.
SALEM A.
M.
Egyptian Armed Forces.
MOHAMED K.
I.
Egyptian Armed Forces.
Journal Article
2019
07
04
ABSTRACT<br />Condition-Based Monitoring involves continuous collection and interpretation of data<br />relating to the operating conditions of critical components of the machine. To ensure<br />high printing quality while maximizing productivity, an on-line process monitoring<br />system is required to take the place of an expert’s judgment. This paper outlines the<br />use of a statistical multivariate technique called Principal Component Analysis (PCA),<br />as a health monitoring technique, and applies it to monitor a GTO type of printing<br />machine. This approach is used to integrate vibration data taken at different positions<br />and directions on the printing machine. Experiments were conducted on the machine<br />for different operating speeds under two conditions, new and worn drive belt. The<br />results showed that the proposed technique can be used for printing machine<br />monitoring and can successfully differentiate between new process conditions.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
STUDY OF THERMOCAPILLARY EFFECTS IN TWO FLUID SYSTEMS USING A SINGLE PHASE MODEL
67
91
39003
10.21608/amme.2008.39003
EN
SAKR I.
M.
Lecturer, Dpt. of Mech. Power Eng., Faculty of Eng., Menoufiya Uni., Shebin El- Kom-Egypt.
BALABEL
A.
Lecturer, Dpt. of Mech. Power Eng., Faculty of Eng., Menoufiya Uni. Shebin El-kom-Egypt.
HEGAB A.
M.
Assoc. Prof., Dpt. of Mech. Power Eng., Faculty of Eng., Menoufiya Uni., Shebin El- kom-Egypt.
SELIM S.
M.
Prof., Dpt. of Mech. Power Eng., Faculty of Eng., Menoufiya Uni., Shebin El-Kom- Egypt.
Journal Article
2019
07
04
ABSTRACT<br />Thermocapillary flows within a differentially heated rectangular cavity containing two<br />immiscible liquid layers are of considerable technological importance in materials<br />processing applications particularly under microgravity conditions where the influence<br />of buoyancy-driven convection is minimized. In the present study, for the first time, we<br />account the affect of normal and tangential forces that control the track of the moving<br />interface by using level set method (LSM). A 2-D numerical procedure for two<br />immiscible fluid systems on the basis of a single phase model and the level set<br />formulation is developed. The time dependent Navier-Stokes and energy equations are<br />solved by means of the control volume approach on a staggered rectangular grid<br />system. The numerical model interprets the tangential and the normal stresses by a<br />single-phase model using a heavy side function. The topological change of the interface<br />between the two immiscible flows is described by the level set method. According to our<br />background this is the first study of such cases using the single phase model and the<br />control volume formulation. Two cases have been studied: the first case contains a<br />system with only one liquid interface (melt/encapsulant) between the two immiscible<br />fluids. The second one has a system with encapsulant free surface opened to air (and<br />so, subjected to a second thermocapillary forces). Both the liquid-liquid interface and<br />the free surface are assumed to be initially flat, which is a valid assumption according to<br />earlier theoretical and experimental results. In later cases, the liquid-liquid interface is<br />allowed to deform. The numerical results are compared with the available analytical<br />models and experimental results. The comparisons showed an acceptable agreement<br />between the present predicted results and the available data shown in the available<br />references.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
A COMPUTATIONAL FLUID DYNAMICS EVALUATION OF A PNEUMATIC SAFETY RELIEF VALVE
92
105
39005
10.21608/amme.2008.39005
EN
DEMPSTER
W.
Lecturer, Dept. of Mechanical Engineering, University of Strathclyde, Glasgow, UK.
Tel.: +441415482044, Fax: +441415525105
ELMAYYAH
W.
PhD research student, Dept. of Mechanical Engineering, University of Strathclyde,
Glasgow, UK.
Tel.: +447515377732.
Journal Article
2019
07
04
ABSTRACT<br />Safety relief valves are well established components preventing catastrophic failure of<br />pressurised systems when non–normal operating conditions occur. However, it is only<br />recently with developments in CFD techniques that the capability to predict the complex<br />flow conditions occurring in the valves has been possible resulting in only limited<br />studies being found in the literature. This paper presents experimental and theoretical<br />investigations applied to a safety relief valve designed for the refrigeration industry but<br />extended here to consider pneumatic systems since air is the compressible fluid. The<br />discharge flow rate and valve forces are determined both theoretically and<br />experimentally for different valve lift conditions and related to the detailed flow<br />conditions (pressure, temperature and Mach number) in the valve predicted by CFD<br />techniques. The CFD code FLUENT has been used with a two dimensional<br />axisymmetric RANS approach using the k-ε turbulent model to predict the highly<br />compressible flow through the valve. The model has been validated by comparison with<br />experimental measurements and the predicted results show good agreement, providing<br />confidence in the use of CFD techniques for valve design and improvement.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
A NEW ENGINEERING METHOD FOR FUZZY RELIABILITY ANALYSIS OF SURGE CONTROL IN CENTRIFUGAL COMPRESSOR
106
116
39007
10.21608/amme.2008.39007
EN
HAFAIFA
A.
Dep. Instrumentation and Control Systems, University of DJELFA, Algeria.
LAAOUAD
F.
Dep. Industrial Process Automation. Faculty of Hydrocarbons, BOUMERDES
University, Algeria.
BENNANI
A.
Orascom Telecom Algeria (OTA), Dar El Beïda office DEP. 2, Dep. Patrimoine,
Algeria.
Journal Article
2019
07
04
ABSTRACT<br />A new dual fuzzy controller for the nonlinear model of the compression system is<br />proposed in this paper. The surge phenomenon in the centrifugal compressor, the nonlinearities<br />and uncertainties of the compression system make it impossible to use a<br />conventional controller over a wide range of operation. This fuzzy controller is designed<br />to consist of a active surge control and phase control without any explicit system<br />models, but driven in the human thinking mechanism. A simulation example of<br />compression system is given to demonstrate the validity of the proposed control<br />scheme. It is shown that the fuzzy controller can be simplified, and good tracking<br />control performance can be achieved by choosing appropriate fuzzy roles. However,<br />the dual fuzzy controller can successfully intervene in the control surge of the<br />compression system. This new fuzzy control methodology suggested in this work<br />reproduced well the main characteristics of the turbo compressor dynamic model<br />developed by Moore and Gretzer and give place to a more precise and easy to handle<br />representation. It is about a inaccuracies reproducing with a certain degree of<br />satisfaction of the real process without being as much complex.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
IMPLEMENTATION OF ELECTRO-HYDRAULIC SERVO-VALVE FOR MODULATION OF THE ROCKET THRUST
117
132
39009
10.21608/amme.2008.39009
EN
RATEB R.
A.
Egyptian Armed Forces.
RABIE M.
G.
Professor, Modern Academy of Engineering and Technology.
ELSENBAWI M.
A.
Egyptian Armed Forces.
Journal Article
2019
07
04
ABSTRACT<br />The modulation of the rocket thrust is required for many practical applications regarding<br />certain missions to be performed by the missile. An existing thrust controller with two<br />modes of operation has been studied and analyzed. To upgrade the controller to<br />acquire a continuous gradual thrust modulation, an Electro-Hydraulic Servo-Pressure<br />Controller (EHSPC) has been integrated with the system after making necessary<br />adaptation of the current design. The valve parameters: controlled pressure, input<br />pressure, pilot pressure variations, and input controlling current have been investigated<br />and compared for the two systems using MATLAB SIMULINK program. It was possible<br />to acquire a new system capable of performing a continuous thrust modulation while<br />keeping the other characteristics of the system before modification.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
NUMERICAL INVESTIGATION OF FATIGUE LIFE ON OPTIMUM AUTOFRETTAGED PRESSURIZED THICK-WALLED CYLINDERS
1
17
39010
10.21608/amme.2008.39010
EN
BIN AYOB
A.
Associate professor. Faculty of Mech. Engineering, Universiti Teknologi Malaysia.
ELBASHEER M.
K.
Postgraduate student, Faculty of Mech. Engineering, Universiti Teknologi Malaysia.
Journal Article
2019
07
04
ABSTRACT<br />The numerical study presents a procedure to determine the optimum autofrettage<br />pressure for a given operating pressure, so as to achieve the longest fatigue service life<br />of thick-walled cylinders. The study investigates the fatigue life of pressurized cylinders<br />under the effect of applied cyclic internal operating pressure. The cylinders had<br />previously undergone a process of optimum autofrettage to induce a minimum total<br />equivalent stress under the operating pressure. A nonlinear material property with a<br />kinematic hardening was used. Experiments were carried out to validate the numerical<br />results of residual stress where strain gages provided the strain values used to find the<br />hoop stresses present on the outer surface. There was good agreement between the<br />FE simulation and the strain measurement in obtaining residual stresses. The<br />performance of the cylinders was evaluated in terms of fatigue damage accumulation<br />for various levels of autofrettage. The results clearly indicate the importance of<br />autofrettage in increasing the fatigue life. In increasing the autofrettage level, the fatigue<br />life increases first, reaches a maximum optimum level and then decreases. In<br />conclusion, optimum autofrettage level leads to an optimum fatigue life.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THREE- LAYERED ELASTIC COMPOSITE WITH SURFACE CRACKS SUBJECTED TO CONVECTIVE COOLING
18
33
39012
10.21608/amme.2008.39012
EN
RIZK A.
A.
Associate professor, Dept. of Science in Engineering, Faculty of Engineering,
International Islamic University, Malaysia, Kuala Lumpur, Malaysia.
Journal Article
2019
07
04
ABSTRACT<br />The Thermoelastic problem for homogenous layer bonded to two similar coated layers<br />with two surface cracks located symmetrically in the outer layers under transient<br />thermal stresses is considered. The transient thermal stresses are generated due to<br />quenching the surfaces containing the edge crack by convective cooling. Consequently,<br />very high tensile stresses developed near the cooled surfaces resulting in severe<br />damage. The analysis of the problem is worked out using the superposition technique<br />and the principle of quasi-static thermoelasticity behavior. The Fourier integral<br />transform technique is used to solve the crack problem resulting in a singular integral<br />equation of Cauchy type with the derivative of the crack surface displacement as<br />unknown function which is solved numerically. Some numerical values of the transient<br />stress intensity factors for two material combinations are obtained for both edge crack<br />and crack terminating at the interface and demonstrated in terms of time, crack length,<br />coefficient of heat transfer and thickness ratio.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
FATIGUE CRACK GROWTH OF STAINLESS STEEL FIBER REINFORCED ALUMINUM COMPOSITES
34
46
39014
10.21608/amme.2008.39014
EN
ESKİZEYBEK
V.
Research Assistant, Dpt. of Mechanical Eng., Selcuk University, Konya, Turkey.
AVCI
A.
Professor, Dpt. of Mechanical Eng., Selcuk University, Konya, Turkey.
ATABERK
N.
Assistant professor, Kadinhani Faik Icil Vocational School, Selcuk University,
Konya, Turkey.
YAPICI
A.
Assistant professor, Dpt. of Mechanical Eng., Selcuk University, Konya, Turkey.
Journal Article
2019
07
04
ABSTRACT<br />In this study, fracture behavior of stainless steel/aluminum laminated composites with<br />middle through thickness crack under fatigue loading, was investigated. The composite<br />material, which has unidirectional continuous AISI 304 stainless steel as fibers and Al<br />2024 as matrix, was produced by using diffusion bonding. The fatigue tests were<br />conducted under agreement with the ASTM E647 standard. The crack initiation,<br />damage behavior, fatigue crack-growth rate (da/dN), stress intensity factor (ΔK), strain<br />energy release rate (ΔG) and fracture toughness ( IC K ) were determined. Moreover, ΔG<br />value was obtained by using Linear Elastic Fracture Mechanics (LEFM) and compliance<br />methods and the results were compared with each other. Also, da/dN-ΔK and da/dN-<br />ΔG were plotted for determining fracture behavior under fatigue loading of the<br />composite material.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
Optimization to the failure of laminated composites with different provisions of reinforcement
47
53
39047
10.21608/amme.2008.39047
EN
DELIOU
A
Researcher, Solar Unit of Development of Equipments, UDES, Tipaza, Algeria.
BOUROUIS
F
Doctor, Dpt. of Mechanical Engineering, Constantine University, Algeria.
MILI
F
Doctor, Dpt. of Mechanical Engineering, Constantine University, Algeria.
Journal Article
2019
07
04
ABSTRACT:
The objective of this work is to effect a comparative study of the mechanical behavior of composite plates with [+θ/-θ] 3S stacking sequence and subjected to tensile loading. The strength of these various composites is ensured by the choice of the components and the adequate arrangement of fibers. The ultimate strength of regular symmetrical laminates will be predicting by the use of a mathematical approach based on the suitable failure criterion. The different obtained results show a variability of the mechanical behavior according to the more or less pronounced anisotropy degree. They permit to propose hybrids able to improve strength of mat composites by the association of the unidirectional or woven fabric reinforcement. The use of the hybridization technique involves the optimal structures and improvement of the mechanical performances of composites materials.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EFFECT OF THE BARRIER GEOMETRY ON THE MITIGATION OF BLAST WAVES
54
65
39056
10.21608/amme.2008.39056
EN
EL-SAYED M.
S.
Egyptian Armed Forces.
YOUNES M.
M.
Egyptian Armed Forces.
EL-BEBLAWY M.
S.
Egyptian Armed Forces.
Journal Article
2019
07
04
ABSTRACT<br />In this paper, a numerical simulation using the commercially available AUTODYN 3D<br />code is carried out to estimate the peak pressure behind a blast barrier. A 50 kg TNT<br />charge source is employed to simulate the blast wave. Four different element<br />geometries are used individually to model various shapes of barriers. These barrier<br />models are constructed singly from plates, angle bars, I-beams or tubes. The pressuretime<br />histories are recorded by using gauges located behind each barrier model. The<br />obtained results are compared with the no-barrier case at the same locations. The<br />influences of the boundary conditions, the cross-sectional dimensions, the spacing<br />between elements and the amount of charge and its position are examined and<br />evaluated. The outputs show that the peak pressure of the blast wave can be reduced<br />depending on certain parameters chosen for the barrier design.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THEORETICAL AND EXPERIMENTAL INVESTIGATION OF THE ANALYSIS OF CHATTER VIBRATION AND STABLITY FOR ORTHOGONAL CUTTING IN TURNING
1
16
39058
10.21608/amme.2008.39058
EN
TURKES
E.
Research Assist., Dpt. of Mech. Eng., Dumlupınar University, Turkey.
ORAK
S.
Associate professor, Dpt. of Mech. Eng., Eskişehir Osmangazi University, Turkey.
Journal Article
2019
07
04
ABSTRACT<br />Increasing of the Maximum Metal Removal Rate (MMRR) in machine tools requires<br />high width of metal removing and machining speeds. This condition cause to change<br />cutting speed and arises vibration on cutting tool. This phenomenon leads to such<br />problems as detrimental effects on the machined surface finish and decreasing the<br />machining efficiency and has adverse effect on the work surface finish, high machining<br />force, tool wear and tool life. Due to the dynamic interactions between cutting tool and<br />workpiece, there occurs self-excited chatter vibration. In this study, chatter prediction is<br />investigated for orthogonal cutting in turning operations. Therefore, the linear analysis<br />of the single degree of freedom (SDOF) model is performed by applying oriented<br />transfer function (OTF) and τ decomposition form to Nyquist criteria. Chatter frequency<br />predictions obtained from both forms were compared with modal analysis and cutting<br />tests. Computer programs required for both forms were written by MATLAB program.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EFFECT OF SIZE AND SHAPE OF ELECTRODES ON THE PERFORMANCE OF EDM
17
25
39059
10.21608/amme.2008.39059
EN
KHAN A.
A.
Professor, Dept. of Manufacturing and Materials Engineering IIUM, Malaysia.
HAQUE M.
M.
Professor, Dept. of Manufacturing and Materials Engineering IIUM, Malaysia.
YEAKUB M.
A
Associate professor, Dept. of Manufacturing and Materials Engineering IIUM,
Malaysia.
Journal Article
2019
07
04
ABSTRACT<br />In the present study the effect of size and different shapes of electrodes on material<br />removal rate (MRR), job surface finish and wear ratio (WR) during EDM has been<br />investigated. The work material taken was mild steel and the electrode material taken<br />was copper. The size of the electrodes was 9mm, 15 mm, 20 mm and 30 mm in<br />diameter. The shapes of the electrodes were square, round, triangular and diamond,<br />having the same area of cross-section. The highest MRR was found for round<br />electrodes followed by square, triangular and diamond shaped electrodes. MRR was<br />found to increases sharply with the increase in diameter of the electrodes. With<br />increase in current, the sparks produced are of higher thermal energy. As a result,<br />increase in current resulted increase in MRR. A higher thermal energy also erodes<br />more material from the electrode. Electrode wear (EW) was measured along the crosssection<br />of the electrode as well as along its length. EW was also found to increase with<br />the increase in current. However, the highest EW was fond on the diamond shaped<br />electrodes followed by triangular, square and the round shaped ones. An electrode of<br />smaller cross-section exhibited a higher electrode wear. Wear ratio (WR) was<br />calculated as the ratio of the volume of material removed from the electrode to the<br />same removed from the work material. The highest WR was found on the diamond<br />shaped electrodes followed by triangular, square and round electrodes. It was also<br />found that WR decreases with increase in cross-sectional area of the electrode. Job<br />surface roughness was found to decrease with increase in electrode diameter, but the<br />effect is very insignificant. The smoothest job surface finish was found for round<br />electrodes followed by square, triangular and diamond shaped electrodes. But again,<br />the influence of the shape of the electrodes on job surface finish was found to be<br />insignificant.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
IMPROVEMENT OF FATIGUE LIFE BY REDUCING THE FORMATION OF CRACK DURING EDM PROCESS
26
34
39062
10.21608/amme.2008.39062
EN
TAI T.
-Y.
Assistant professor, Dpt. of Mechanical Engineering, Southern Taiwan University, Tainan,
Taiwan.
LEE H.
-T.
Professor, Dpt. of Mechanical Engineering, National Cheng-Kung University, Tainan, Taiwan.
HSU F.
-C.
Engineer, Metal Industries Research & Development Centre (MIRDC), Kaohsiung, Taiwan.
Journal Article
2019
07
04
ABSTRACT<br />The present study performs an experimental investigation to identify the EDM<br />processing parameters which suppress the formation of surface cracks in the<br />machined surface of SKD11 tool steel specimens. The rapid heating and cooling<br />effects inherent in the electro-discharge machining (EDM) process result in the<br />formation of a brittle recast layer on the machined surface. This layer increases the<br />surface roughness of the machined component and is characterized by globules of<br />debris, shallow craters, pockmarks, voids and cracks.<br />In the EDM trials, the specimens are machined using pulse currents of 4A, 16A or<br />32A with pulse-on durations of either 4μs or 16μs. The various specimens are then<br />fatigue tested at loads ranging from 150~245 Kg in order to determine their<br />respective fatigue lives. A polished SKD11 specimen is also fatigue tested for<br />comparison purposes. The results show that the EDM processing parameters have<br />a significant effect on the surface cracking characteristics. Specifically, when the<br />EDM process is performed using a pulse current of 4A and a pulse-on duration of<br />16μs, the machined surface is found to have a high surface crack density and some<br />of the cracks penetrate as far as the parent material. With processing parameters of<br />16A /4μs and 32A/16μs, a recast layer is formed on the surface of the machined<br />specimen, but no surface cracks are observed. Hence, it can be inferred that<br />increasing the pulse current and reducing the pulse-on duration provides an<br />effective means of suppressing the surface cracking phenomenon. Higher values of<br />the pulse current and pulse-on duration (i.e. 32A and 16μs, respectively) are found<br />to increase the average thickness of the recast layer and to prompt a corresponding<br />reduction in the fatigue life of the machined specimen.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
SILVER TOUGHENED ALUMINA CUTTING TOOL INSERTS: PERFORMANCE EVALUATION USING DYNAMIC COMPONENTS OF CUTTING FORCE SPECTRA
35
47
39064
10.21608/amme.2008.39064
EN
DUTTA A.
K.
Professor, Dept. of Mechanical Engineering, Bengal Engineering and Science
University, Howrah, India.
GUHA
A.
Lecturer, Mechanical Engineering, Bengal Engineering and Science University,
Howrah, India.
RAY K.
K.
Professor, Dept of Metallurgical & Materials Engineering, Indian Institute of
Technology, Kharagpur, India.
Journal Article
2019
07
04
ABSTRACT<br />Cutting tool inserts have been fabricated using alumina with different amounts of silver<br />by conventional powder metallurgical route. The machining performance of these<br />composite inserts vis-à-vis that of commercial zirconia toughened alumina inserts have<br />been evaluated by dry turning operations on steel bars under a wide range of cutting<br />parameters. The experiments consisted of measurement and examinations of the static<br />and the dynamic components of the cutting force spectra, flank wear of the tool, surface<br />roughness on the work piece, and chip morphology. Analyses of the fluctuations in the<br />dynamic force spectra using a new approach based on a quasi-fractal model have been<br />used to reveal the potential of different tool materials with respect to their cutting<br />performance. Examinations and pertinent discussion of the operative wear mechanisms<br />during machining by the developed composites vis-à-vis their structure-property<br />relations are some essential supplements of this investigation.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
PRODUCTION OF BIMETALLIC AND TRIMETALLIC MATERIALS BY EXPLOSION WELDING AND ALLIED PROCESSES
48
60
39065
10.21608/amme.2008.39065
EN
TURŇA
M.
Faculty of Materials Science and Technology, Slovak University of Technology
Bratislava, Trnava, Slovak Republic.
NESVADBA
P.
ROLC
S.
ČAPLOVIČ
Ľ.
Faculty of Materials Science and Technology, Slovak University of Technology
Bratislava, Trnava, Slovak Republic.
TURŇOVÁ
Z.
Faculty of Materials Science and Technology, Slovak University of Technology
Bratislava, Trnava, Slovak Republic.
Journal Article
2019
07
04
ABSTRACT<br />The paper and talk deal with the research results in the field of welding the combined<br />metals such as Ti-Cu, Ti-Al, Sn-Cu, Al-Mg alloy, Monel-steel, Pb-steel, AlSi alloy-Cu,<br />Ta-Monel, Ta-Stainless Steel, Monel-Ta, steel-Ti-Al, steel-Cu-Al, etc., as well as the<br />processes allied. The combinations that are not mentioned in the paper will be<br />presented during the talk.<br />The results were attained in collaboration with the Research Institute of Industrial<br />Chemistry, Pardubice-Semtin (Czech Republic) and the Slovak University of<br />Technology, Department of Welding, Faculty of Materials Science and Technology,<br />Trnava (Slovak Republic). The bimetals and trimetals were produced using the Semtex<br />S explosive. The quality of joints was evaluated by ultrasonic detection, optical<br />microscopy, microhardness measurements and X-ray microanalysis.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
INFLUENCE OF HIGH PROFILE SHIFT IN IMPROVING SURFACE DURABILITY
1
14
39251
10.21608/amme.2008.39251
EN
GONSALVIS
J.
Principal, St. Joseph Engineering College, Mangalore.
Author for correspondence.
PRAKASH H.
R.
Lecturer, Dept. of Mechanical Engineering, BMS College of Engineering, Bangalore.
SACHIDANANDA H.
K.
Assistant Professor Dept. of Mechanical Engineering Sahyadri Institute of Technology,
Mangalore.
LAKSHMAN N.
L.
Assistant Professor, Dept. of Mechanical Engineering, Malnad College of Engineering,
Hassan, India.
Journal Article
2019
07
07
ABSTRACT<br />The use of profile shift in involute tooth gearing has permitted the gear designer to<br />utilize conveniently different parts of the involute tooth curve generated by the base<br />circle. The procedure is called profile shifting or profile correction, which helps achieve<br />desirable tooth-action and to avoid interference or undercutting and also the most<br />dangerous tooth contact in the vicinity of the base circle. Altering a tooth-sum of a gear<br />pair operating between a specified centre distance changes the operating pressure<br />angle and hence necessitates profile shift. This profile shift can be distributed between<br />the gears of the pair suitably. Such gear pairs display considerable lowering of contact<br />stresses which is a more desirable characteristic for power transmission gearing. Few<br />cases of altered tooth-sum gearing have been subjected to experimental tests, the<br />performance of this gearing is compared vis-à-vis standard tooth-sum gearing. The<br />results have been highly encouraging. Such findings suggest the use of altered toothsum<br />gearing for power transmission applications. This paper presents the use of high<br />profile shift gearing in improving the surface durability of gears.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EVALUATION OF FRICTIONAL CHARACTERISTICS OF AEROSTATIC LINER BEARING
15
21
39253
10.21608/amme.2008.39253
EN
FUJII
Y.
Professor, Dpt. of Electronic Engineering, Gunma University, Kiryu, Japan.
Journal Article
2019
07
07
ABSTRACT<br />A method based on the Levitation Mass Method (LMM) for evaluating the components<br />of the force acting on a moving part of a pneumatic linear bearing has been proposed<br />by the author. The total force acting on the moving part is accurately measured as the<br />inertial force using an optical interferometer. The efficiency of the developing method<br />for evaluating the frictional characteristics of pneumatic linear bearings and the new<br />information obtained on the frictional characteristics of a pneumatic linear bearing is<br />discussed. The essence of the LMM as a precision method for measuring mechanical<br />quantities is reviewed.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
OPTIMIZATION SCHEME for a SMALL CROSS-FLOW HYDRO TURBINE RUNNER
22
38
39255
10.21608/amme.2008.39255
EN
AKCAN
C.
Graduate student, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey.
AKSIT M.
F.
Associate professor, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey.
KIZILTAS
G.
Assistant professor, Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey.
KANDEMIR
I.
Assistant professor, Design and Manufacturing Engineering, Gebze Institute of Technology, Kocaeli, Turkey.
Journal Article
2019
07
07
ABSTRACT<br />Obtaining a closed form analytical formulation for complex mechanical structures such<br />as turbine rotors with multiple blade assemblies can be very problematic. Building a<br />prototype without optimizing the structural stress levels may result in unnecessary<br />hardware costs. In this work, mathematical models for highest stress or lowest factor of<br />safety on critical components of a small modular cross-flow hydro turbine rotor have<br />been explored for various design options through a response surface analysis. The<br />response surface model is obtained based on finite element analysis results following<br />design of simulated experiments. Rotor design parameters have been investigated to<br />optimize factor of safety on critical components without violating the specified weight<br />limits. Box-Henken data tables have been used to obtain the response surface model.<br />The attained response model yields the maximum stress and lowest factor of safety for<br />critical rotor components for various combinations of design parameters. Verification<br />runs indicate that response model successfully predicts factor of safety levels close to<br />finite element calculations.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
COMPARATIVE STUDY OF INITIATION FATIGUE LIFE OF FREE DEFECT AND DEFECTIVE MATERIALS
39
46
39257
10.21608/amme.2008.39257
EN
BOURAOUI
Ch.
Laboratoire de Génie Mécanique, Ecole Nationale d’Ingénieurs de Monastir, Avenue
Ibn El Jazzar, 5019 Monastir, Tunisia.
NASR
A.
Laboratoire de Génie Mécanique, Ecole Nationale d’Ingénieurs de Monastir, AvenueIbn El Jazzar, 5019 Monastir, Tunisia.
NADOT
Y.
Laboratoire de Génie Mécanique, Institut supérieur de transport et de la logistique,
4000 Sousse, Tunisia.
FATHALLAH
R.
Laboratoire de Mécanique et de Physique des Matériaux, UMR CNRS no. 6617,
ENSMA, Téléport 2, BP 40 109, 86961 Futuroscope Cedex, France.
Journal Article
2019
07
07
ABSTRACT<br />This paper presents an experimental comparison of crack initiation, between free defect<br />and defect material, under High Cycle Fatigue (HCF) loading. Experiments are carried<br />out on a C35 steel. Results show that crack initiation and crack propagation<br />mechanisms for defective material are the same as defect free material: cracks are<br />initiated in the maximum shear plane then they propagate in the plane perpendicular to<br />the maximum principal stress direction. But the length of the stage I cracks of defect<br />materials is always very short in comparison with those of defect free materials. Crack<br />propagation regime life in defect materials is very short, contrary to defect free material<br />which shows an early crack initiation However, contrary to the common belief, the<br />fatigue life initiation is not consumed in defective material and particularly in torsion<br />loading where the cyclic stress tensor becomes complex around the defect.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THE TRANSITION FROM SINGLE TO MULTIPLE CRACKING IN CERAMIC/METAL LAMINATES
47
63
39258
10.21608/amme.2008.39258
EN
El-Shaer
Y.
Egyptian Armed Forces.
Derby
B.
Professor, Manchester Materials Science Centre, UMIST, Manchester, U.K.
Journal Article
2019
07
07
ABSTRACT<br />During the fracture of metal/ceramic laminates two different damage modes are<br />observed: one is the formation of a zone of multiple cracks near the tip of a<br />macroscopic crack, and the other is the continuous propagation of a macroscopic crack<br />in the ceramic layers while the metal layers remain intact. The criterion for the transition<br />from single to multiple cracking is a key parameter for the design of metal/ceramic<br />laminates. A plot (which is called a ‘Fracture map’) has been constructed to enable the<br />designer to determine the fracture mode for a given laminate.<br />In the present work, a new fracture map is proposed which includes the effect of the<br />non-deterministic strength of the ceramic on the transition from single to multiple<br />cracking. The proposed probability-based fracture map is compared with previous<br />maps, and compared with experimentally observed fracture modes of different<br />ceramic/metal laminates.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
INTERGRATION OF SEAWATER DESALINATION IN A SOLAR HEAT TRANSFORMER: ANALYSIS BY THE FIRST AND SECOND LAW OF THERMODYNAMICS
133
147
39260
10.21608/amme.2008.39260
EN
Rabah
GOMRI
Assistant professor, Engineering Faculty, Dpt. of «Génie Climatique», Constantine
University, 25000 Constantine, Algeria.
Journal Article
2019
07
07
ABSTRACT<br />In this paper, an attempt has been made to study the combination: flat plate solar<br />collectors, a single effect heat transformer and desalination system used to provide a<br />seaside house with drinking water. Mathematical models of the solar flat plate collectors<br />(FPC), absorption heat transformer (AHT) operating with the H2O-LiBr solution and the<br />overall desalination system (WP) were developed to simulate the performance of this<br />combination system. The energy and exergy analysis is carried out for each<br />component of the system. All exergy losses that exist in this solar desalination system<br />are calculated. Energy and exergy efficiencies are estimated.<br />The energy efficiency of WP is higher then that for FPC and AHT. An acceptable<br />thermal efficiency of 0.62 is obtained. From the view point of energy the combination<br />FPC-AHT for desalination is an interesting system. Considering the overall desalination<br />plant, the FPC is the component in which the highest exergy loss is generated.<br />Exergetic efficiency of AHT increases slightly with an increase in the time of day. The<br />daily exergetic efficiency of WP is higher then that for FPC and lower than that for<br />AHT. An average value of exergetic efficiency of WP is 0.124. This small value of the<br />exergetic efficiency of FPC is due to the important amount of exergy destructed in FPC.<br />From the view point of exergy analysis and excluding the effect of exergy destructed in<br />the FPC the combination FPC-AHT for desalination is an interesting system.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THERMAL ANALYSIS OF A MICRO DEVICE USED FOR DETECTION OF COLORECTAL CANCER
148
157
39261
10.21608/amme.2008.39261
EN
AHMED M.
I.
Department of Mechanical Engineering, Faculty of Engineering, International Islamic
University, Kuala Lumpur, Malaysia.
HRAIRI
M.
Department of Mechanical Engineering, Faculty of Engineering, International Islamic
University, Kuala Lumpur, Malaysia.
Journal Article
2019
07
07
ABSTRACT<br />Finite element modelling is widely used in technological applications. The benefits of<br />using simulation are clear: reduced time and cost when introducing new products to<br />market, better knowledge of part dynamic and static properties, and the opportunity to<br />replace life cycle device tests, among others. Finite element analysis (FEA) is<br />extensively used in medical devices development cycle especially during the<br />preliminary analysis of re-design and optimization and when passing the final design<br />analysis and reliability evaluation. Typical analysis of implantable medical devices is<br />challenging due to the highly nonlinear nature of the physical problem due to large<br />geometric changes, contact and material behaviour. The current paper will investigate<br />the design of a micro device intended for detection of colorectal cancer through a<br />thermal analysis process and optimum sizing of air slits and side cuts between the<br />different thermal zones of the device. By comparing the results of the numerous carried<br />out simulations, an optimum design was found.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
A COMPARISON BETWEEN FLOWS OF THREE REACTION SYSTEMS THROUGH SUPERSONIC PROPULSIVE NOZZLES
158
175
39262
10.21608/amme.2008.39262
EN
KEMRY M.
M.
Prof., Mechanical Engineering Department, Al-Azhar University, Cairo, Egypt.
EL-KADY E.A.
A.
Associate Prof. , Mechanical Engineering Department, Al-Azhar University, Cairo, Egypt.
Journal Article
2019
07
07
ABSTRACT<br />The present study is concerned with the analytical solution of frozen flows of<br />combustion gases through the supersonic region of an axisymmetric nozzle. The<br />product gases of C12H26–O2 , H2–O2 and H2–F2 reaction systems are considered. A<br />predictor-corrector method is employed for approximating the differential terms of the<br />governing equations; while the method of characteristics is used to solve the resulting<br />equations for variable specific heat ratio. The study includes a comparison of the results<br />of the three reaction systems. The results involve the flow field parameters; namely ,<br />the temperature T, the pressure P, the velocity V and Mach number M. The results of<br />the propulsion Parameters namely; thrust force F, the specific impulse Isp, specific<br />impulse based on fuel combustion Isp,f and thrust efficiency ηf are also presented. All<br />results are presented for a combustion chamber dimensionless pressure , Pc=30 , an<br />equivalence ratio, Φ=1, a dimensionless throat radius of curvature of the nozzle, ρt=2 ,<br />and a straight nozzle wall angle, ψ=20°, as a controlling factors. Results show that the<br />point of tangency at nozzle wall is a source of creating oblique shock waves. The<br />C12H26–O2 , H2–O2 reaction systems produce approximately equal thrusts which are<br />higher than that produced by H2–F2 reaction system. Besides, the specific impulse<br />attained by H2–F2 system is of highest magnitude; and there are negligible influences of<br />the three systems on the thrust efficiency.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EVALUATION OF CO-GENERATION AND TRI-GENERATION SYSTEMS EMPLOYING RECIPROCATING AND GAS TURBINE ENGINES FOR POWER GENERATION
176
198
39266
10.21608/amme.2008.39266
EN
ELKADY E.
A.
Associate Prof., Mech. Eng. Dept., Faculty of
Engineering, Al-Azhar University, Nasr City, Cairo, Egypt.
SAID S.
A.
M.Sc Applicant., Mech. Eng. Dept., Faculty of
Engineering, Al-Azhar University, Nasr City, Cairo, Egypt.
ELKADY
M.A.
Professor, Mech. Eng. Dept., Faculty of
Engineering, Al-Azhar University, Nasr City, Cairo, Egypt.
Journal Article
2019
07
07
ABSTRACT<br />The present investigation is a trial to tackle the problem of energy rationalization in<br />power generation. It is believed that such target can be reached through employment of<br />tri-generation system for combined heating, cooling and power production (CHCP). The<br />power range selected for the present study is from few hundreds kilowatt to five<br />megawatts electric demand. The present study investigates four arrangements to select<br />the best solution to achieve the requirements of power, cooling load, and/or heating<br />load for various applications. These arrangements include tri-generation, cogeneration<br />with heating, cogeneration with cooling, and separate unit arrangement.<br />A computer program was developed in the present investigation using Lab-View<br />graphical language. The developed computer code allows the selection of the most<br />economical power generating system to satisfy given requirements of electric, heating<br />and cooling loads. Moreover, the program model can determine the optimal strategies<br />that minimize the overall cost of energy for the CHCP system.<br />A comparison between the economics of each arrangement was conducted in terms of<br />total cost saving ratio (TCSR). This comparison revealed a saving ranging from 15% to<br />25% of the total cost of the separate units arrangement within five years by using<br />cogeneration or tri-generation arrangements. This saving is associated with the<br />employed energy rationalization technique, which is defined in terms of the primary<br />energy saving ratio (PESR). Cogeneration and tri-generation arrangements proved to<br />be able to achieve primary energy saving ratios ranging from 25% to 30%.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
DYNAMIC STUDIES ON MOTORCYCLE HELMETS
66
73
39267
10.21608/amme.2008.39267
EN
PINNOJI P.
K.
Research Scholar, Dept. of Applied Mechanics, Indian Institute of Technology Delhi,
India.
P. MAHAJAN
P.
Professor, Dept. of Applied Mechanics, Indian Institute of Technology Delhi, India.
Journal Article
2019
07
07
ABSTRACT<br />Threes different motorcycle helmets were studied here to investigate the dynamic<br />performance. First is helmet with Acrylo-Butadiene Styrene (ABS) shell, second is<br />helmet with metal foam, and third is helmet with single groove and slot for providing the<br />ventilation. Computational fluid dynamics studies show considerable improvement in air<br />velocities inside the helmet in the presence of grooves and slot. Front impact analyses<br />with all the helmet models were carried out at 7 m.s-1 velocity. Forces, Head Injury<br />Criterion (HIC), and acceleration were evaluated by considering head as a rigid and<br />found not to change significantly due to the presence of groove and slot in the helmet.<br />The dynamic performance of a helmet with outer shell as metal foam was examined<br />and compared with ABS material.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
A POSTERIORI ERROR INDICATOR FOR COULOMB’S FRICTIONAL CONTACT
74
86
39270
10.21608/amme.2008.39270
EN
BECHEUR
A.
Assistant Professor, Laboratoire de Technologie des Matériaux et de Génie des
Procédés LTMGP. University of Bejaia. Route de Tharga-ouzemour.. 06000
BEJAIA. Algeria.
TAHAKOURT
A.
Professor, Laboratoire de Technologie des Matériaux et de Génie des Procédés
LTMGP. University of Bejaia. Route de Tharga-ouzemour.. 06000 BEJAIA.
Algeria.
COOREVITS
P.
Professor, Laboratoire des Technologies Innovantes LTI, EA3899, Université de
Picardie Jules Verne, France.
Journal Article
2019
07
07
ABSTRACT<br />In this paper, we present a new error indicator for the frictional contact problem<br />governed by Coulomb’s law. This indicator is built over the combination of two known<br />methods. The first concerns the error obtained from the projection techniques where<br />super convergence properties are used for smoothing the finite element stress fields.<br />The second method takes into account the errors in the constitutive relation of the<br />contact zones. By using both the error indicator and procedures of mesh adaptivities,<br />we show example of optimised computations.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
COMPUTATIONAL AND EXPERIMENTAL STUDY OF ENERGY ABSORPTION METTER BY COMPOSITE STRUCTURES
87
102
39272
10.21608/amme.2008.39272
EN
NIEZGODA
T.
Professor, Department of Mechanics and Applied Computer Science, Military
University of Technology, Warsaw, Poland.
BARNAT
W.
Resarch Associate, Department of Mechanics and Applied Computer Science, Military
University of Technology, Warsaw, Poland.
MORKA
A.
Resarch Associate, Department of Mechanics and Applied Computer Science, Military
University of Technology, Warsaw, Poland.
Journal Article
2019
07
07
ABSTRACT<br />The analysis considers the problem of transport safety improvement by application of<br />additional impact energy dissipating elements. The results from experimental tests and<br />numeric simulations of basic energy-absorbing element, in the form of sleeve made of<br />steel and glass-epoxide composite are presented. These results were also used for the<br />development of reliable numerical model of road barrier and for a simulation of barrier.<br />The obtained results allowed for the practical usability assessment of the proposed<br />solution.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
FRACTURE BEHAVIOR OF THE POLYMETHYL METHACRYLATE WITH TWO DIFFERENT CURING PROCESSES
117
127
39276
10.21608/amme.2008.39276
EN
EL-ASSAL A.
M.
Benha University.
AL-DOSARY
S.
King Abdulaziz University.
SHEHATA M.
M.
Tanta University.
BASALAH A.
A.
King Abdulaziz University.
Journal Article
2019
07
07
ABSTRACT<br />The usage of Polymers in different fields is enormous and crucial. Polymethyl<br />Methacrylate (PMMA) is one of the earliest widely used polymers, and well known<br />around the world by a variety of trade names; Lucite, Oroglas, Perspex, Plexiglas and<br />acrylic resin which may vary from country to country. This material is one of the hardest<br />polymers, rigid and good weather resistance.<br />The usage of PMMA is widely spread in the medical technologies which reflected from<br />a good degree of compatibility with human tissue, and can be used for replacement of<br />intraocular lenses in the eye when the original lens has been removed in the treatment<br />of cataracts. In orthopaedics, PMMA bone cement is used to affix implants and to<br />remodel lost bone caused by traffic accident and war injures. In cosmetic surgery, tiny<br />PMMA microspheres suspended in some biological fluid are injected under the skin to<br />reduce wrinkles or scars permanently.<br />Parts made of PMMA have high mechanical strength and good dimensional stability.<br />Other reported properties include a high Young's modulus and good hardness with low<br />elongation at break. Therefore, PMMA was used extensively as aircraft windshields for<br />many aircraft (hitting a bird at 600 mph is dangerous to aircraft as it is deadly for birds).<br />On the other side, typical working loads during Polymers service are the loads leading<br />to fracture. Even though this kind of loading resistance in PMMA is important, there is a<br />deficiency in the literature in this area. Accordingly, covering this area constitutes very<br />important potential for research and study.<br />Therefore, the purpose of this research is to investigate the fracture behavior of PMMA.<br />Two methods of preparing the specimens (method of cure) will be taken into<br />consideration. As a result of this research, more accurate data about fracture and<br />mechanical properties about this widely used material in dental applications are<br />becoming available for dentists. Tensile, compression and fracture tests were carried<br />out in this study. The results showed that a slight improve in the tensile strength of the<br />long curing process specimens compared with short curing specimens. However, the<br />compressive strength of the short curing is better than long curing specimens. The<br />fracture test results showed that the fracture toughness of the short curing specimens is<br />higher than that of the long curing specimens.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
DAMAGE PREDICTION OF AXIALLY CRUSHED CORRUGATED FRUSTA
103
116
39280
10.21608/amme.2008.39280
EN
YOUNES M.M.
A.
Egyptian Armed Forces.
Journal Article
2019
07
07
ABSTRACT<br />Failure analysis of corrugated shells requires knowledge of the behavior of a shell<br />structure as it is crushed. Investigation of this problem is presented in this paper. The<br />axial crushing of a right circular axi-symmetric corrugated frusta subjected to quasistatic<br />compression is numerically studied. The finite element code ABAQUS/Explicit<br />was employed to predict the crushing behavior and the effect of different geometric<br />parameters required to enhance the energy absorption capability of corrugated frusta.<br />The main objectives are to establish the load-deflection response of the axi-symmetric<br />corrugated frusta and to describe the overall deformation of the frusta, since this data<br />greatly affect the energy absorbed by frustum models. The present simulation also<br />provides a simple demonstration of the capabilities of ABAQUS/Explicit for modeling<br />contact problems between deformable bodies and rigid, impenetrable surfaces. Results<br />showed that as the number of corrugations along a frustum generator increases, the<br />amount of absorbed energy significantly increases, however the collapse modes of<br />those corrugated frusta are qualitatively similar. The influence of varying the axial<br />length-to-thickness ratio and the corrugation angle on the crashworthiness performance<br />of frustum models are predicted and the obtained finite element results are depicted<br />and assessed.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
A NEW PROCEDURE OF ROBOTS SPATIAL ROTATIONS TERMINAL CONTROL
1
12
39283
10.21608/amme.2008.39283
EN
MILNIKOV
A.
Doctor of Sciences, Ph.D., Professor, Dean of the Faculty of Computer Technologies and
Engineering of International Black Sea University (D. Aghmashenebelis Kheivani 13km. #2
Tbilisi, Georgia Tel:(+995 32) 595005 Fax: (+995 32) 595008.
Journal Article
2019
07
07
ABSTRACT<br />In the article, using spinor representation of orthogonal transformations, the expressions<br />between second order complex unitary transformations matrixes and real orthogonal<br />matrixes of spatial rotations in three dimensional Euclidean space L3 are received, that<br />allows easily calculating of corresponding Euler’s angles. The obtained results have<br />enabled reducing the actually three-dimensional problem of spatial motion control to the<br />one-dimensional problem; control kinematical functions of Euler’s angles and control<br />spinor matrix of rotation were constructed, by means of which control process of spatial<br />rotations is completely determine.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
A NEW TECHNIQUE FOR ACTUATING PARALLEL MANIPULATORS
13
24
39285
10.21608/amme.2008.39285
EN
KHIDIR E.
A.
Post Doctoral Fellow, Dpt. of Mech. and Mat. Eng., UKM, Bangi, Malaysia.
MOHAMED N.A.
N.
Professor, Dpt. of Mech. and Mat. Eng., UKM, Bangi, Malaysia.
NOR M.J.
M.
Professor, Dpt. of Mech. and Mat. Eng., UKM, Bangi, Malaysia.
MUSTAFA M.
M.
Professor, Dpt. of Electrical, Electronic and System, UKM, Bangi, Malaysia.
Journal Article
2019
07
07
ABSTRACT<br />This paper presents a new technique of actuating a parallel platform manipulator using<br />shape memory alloy (SMA). This is a type of smart materials that can attain a high<br />strength-to-weight ratio, which makes them ideal for miniature application. The work is<br />divided into two main parts; developing a new SMA actuator and then incorporating the<br />actuator in building the parallel manipulator prototype. The SMA used in this study is a<br />commercial NiTi wire. The SMA wire provides an actuating force that produces a large<br />bending and end displacement. A 3-UPU (Universal-Prismatic-Universal) parallel<br />manipulator using linear SMA actuators was developed. The manipulator consists of a<br />fixed platform, a moving platform and three SMA actuators. The manipulator workspace<br />was specified based on the restrictions due to actuator strokes and joint angle limits.<br />System identification techniques were used to model both heating and cooling processes.<br />An ON/OFF control was performed and the results showed closeness in simulation and<br />experimental results. This study showed that shape memory alloy actuated beam can<br />successfully be used to provide linear displacement. The built prototype indicates the<br />feasibility of using SMA actuators in parallel manipulators.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
DEVELOPMENT OF INDOOR NAVIGATION SYSTEM FOR MOBILE ROBOT BY USING RFID
25
32
39288
10.21608/amme.2008.39288
EN
SEON J.
A.
Professor, School of Mechanical Systems Engineering, Chonnam. National University,
South Korea.
KIM S.
S.
Professor, School of Mechanical Systems Engineering, Chonnam. National University,
South Korea.
KEE C.
D.
Ph.D. students, School of Mechanical Systems Engineering, Chonnam. National University,
South Korea.
Journal Article
2019
07
07
ABSTRACT<br />RFID system can be used to improve object recognition, map building and localization<br />for robot area. A novel method of indoor navigation system for a mobile robot is<br />proposed using RFID technology. The mobile robot with a RFID reader and antenna is<br />able to find what obstacles are located where in circumstance and can build the map<br />similar to indoor circumstance by combining RFID information and distance data<br />obtained from other sensors. Using the map obtained, the mobile robot can avoid<br />obstacles and finally reach the desired goal by A* algorithm. 3D map which has the<br />advantage of robot navigation and manipulation is able to be built using x, y, z<br />dimensions of products. The proposed robot navigation system is proved to apply for<br />SLAM and path planning in unknown circumstance through numerous experiments.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
SOCIAL POTENTIAL MODEL TO SIMULATE EMERGENT BEHAVIOUR FOR SWARM ROBOTS
33
47
39289
10.21608/amme.2008.39289
EN
MABROUK M.
H.
PhD research student, Dept. of Mechanical Engineering, University of Strathclyde, Glasgow, UK.
MCINNES C.
R
Professor, Dept. of Mechanical Engineering, University of Strathclyde, Glasgow, UK.
Journal Article
2019
07
07
ABSTRACT<br />Swarm robotics has a wide range of applications in numerous fields from space and subsea<br />exploration to the deployment of teams of interacting artificial agents in disposal<br />systems. In this paper, we introduce a model to simulate the emergent behaviour of multiagent<br />robot systems, based on principles from physical mechanics. The model is based on<br />mutual interactions among the swarm individuals. The main elements of these interactions<br />are repulsion forces, attraction forces, alignment forces and dissipative forces generated<br />by the swarm members. Using statistical tools, which are used to investigate simulated<br />group behaviour, we discuss the importance of introducing some dissipation to the system<br />as well as the effect of the interaction parameters on various components of the model.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
NONLINEAR ∞ H CONTROL OF A QUADROTOR UNMANNED AERIAL VEHICLE
48
57
39292
10.21608/amme.2008.39292
EN
MOKHTAR
A.
University of Sciences and Technology Oran, BP1505 El M'naour Oran Algeria.
BENALLEGUE
A.
Robotic Laboratory of Versailles, 10 avenue de l'Europe Velizy, France.
ORLOV
Y.
Scientific Research Technology Development (CITEDI-IPN), Ave. del Parque 1310 Mesa de Otay,
Tijuana, B.C., Mexico.
DAACHI
B.
Laboratoire Images, Signaux et Intelligence Artificielle (LISSI) 122-124, rue Paul Armangot
94200 Vitry sur Seine (France).
Journal Article
2019
07
07
ABSTRACT<br />A nonlinear ∞ H output feedback controller is proposed and coupled to a PI controller to<br />regulate an UAV in the presence of aerodynamic force and moment perturbations. The<br />plant to be controlled is a Quadrotor helicopter described by nonlinear dynamics with<br />plant uncertainties due to the variations of inertia moments and payload operation. A<br />robust state estimation is considered under model uncertainties as well as<br />external/measurement disturbances. Performance issues of the controller are illustrated<br />in a simulation study made for an UAV prototype.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
DESIGN AND DEVELOPMENT OF POWER RECIRCULATING GEAR TEST RIG
64
73
39295
10.21608/amme.2008.39295
EN
GONSALVIS
J.
Principal, St. Joseph Engineering College, Mangalore.
Author for correspondence.
SACHIDANANDA H.
K.
Assistant Professor Dept. of Mechanical Engineering Sahyadri Institute of Technology,
Mangalore.
PRAKASH H.
R.
Lecturer, Dept. of Mechanical Engineering, BMS College of Engineering, Bangalore.
RAJESH A.
R.
Senior Lecturer, Dept. of Mechanical Engineering DACG Polytechnic, Chickmagalur.
Journal Article
2019
07
07
ABSTRACT<br />Gears are used for transmission of motion or power from one shaft to another. The type<br />of gear, and design features, determine not only the operating characteristics of a gear<br />pair but also whether it may fail prematurely. Testing of gears is essential to know their<br />reliability in their field performance. Laboratory methods, though cannot fully create a<br />replica of the environment to which these gears are subjected to while working in the<br />fields, but these methods certainly help in building confidence in their level of<br />performance expected. In order to measure the performance of the gear it has to be<br />designed, fabricated and tested. Various types of gear testing machines are available<br />which use the principle of “four square” in which two gear sets are joined back to back<br />and locked together after applying a twisting couple to one of the connecting shafts.<br />The novelty of this gear testing machine is that in order to apply tooth loads back to<br />back, a torque meter is employed, which helps apply metered torque, which eliminates<br />twisting of a long shaft. The power required to drive this test rig is only the frictional<br />power loss occurring between gear tooth contacts. This paper discusses about design<br />and development of a power re-circulating test rig for testing gear samples.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EFFECT OF BOLT SCATTER ON DIFFERENT SIZES OF GASKETED BOLTED FLANGE JOINTS: A COMPARATIVE F.E. STUDY
74
83
39298
10.21608/amme.2008.39298
EN
ABID
M
Associate Professor, Faculty of Mechanical Engineering, Ghulam Ishaq Khan Institute of
Engineering Sciences and Technology, Topi, Pakistan.
Journal Article
2019
07
07
ABSTRACT<br />The performance of gasketed bolted flange joint depends on the proper joint assembly.<br />During gasketed joint assembly, joint relaxation is a known phenomenon which is<br />concluded due to the bolt scatter. Non-uniform gasket stress is concluded due to the<br />bolt scatter using torque control method and due to the presence of the elastic<br />interaction and flange deformation. In this paper, flange bending stress, flange rotation,<br />bolt bending, stress variation at gasket and centring ring of the gasketed flange joints<br />for class 900# and different sizes from 0.5-24 inch is analyzed during bolt up and<br />internal pressure loading for comparative study. Bolt scatter and overall joint relaxation<br />behaviour is discussed in detail for different sizes.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
HIGH TEMPERATURE FATIGUE BENDING PROPERTIES OF LOW CARBON STEEL
84
95
39301
10.21608/amme.2008.39301
EN
HASSAN M.
Y.
Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia,
43400 Serdang, Selangor, Malaysia.
ALI
A.
Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia,
43400 Serdang, Selangor, Malaysia.
SAPUAN S.
M.
Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia,
43400 Serdang, Selangor, Malaysia.
HOO C.
B.
Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia,
43400 Serdang, Selangor, Malaysia.
Journal Article
2019
07
07
ABSTRACT<br />High temperature fatigue bending properties of low carbon steel was studied. Tests<br />were carried out on a constant speed of 50Hz (3000rpm) at 300°C and 500°C by<br />decreasing stress amplitudes. The investigation was performed based on the stress-life<br />(S-N) approach for high cycle fatigue regime, to establish the empirical equations for<br />fatigue strength and endurance limit.<br />The endurance limit for 300°C is 249.9MNm-2 with knee at 10.03 million cycles while for<br />500°C it is expected to occur on 171.0MNm-2 at 43.29 million cycles. For low carbon<br />steel test at even higher temperature will experience further drastic drop in fatigue<br />strength.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
FINITE ELEMENT ANALYSIS OF A STEEL POST INSERTED IN POLYMER CYLINDER UNDER PULL-OUT AND TORQUE LOADINGS
96
107
39303
10.21608/amme.2008.39303
EN
DAMMAK
M.
Professor, Dpt. of Technology, Institut Préparatoire aux Etudes d’Ingénieurs
de Sfax, Sfax, Tunisia.
KHARRAT
M.
Associate professor, Dpt. of Technology, Institut Préparatoire aux Etudes
d’Ingénieurs de Sfax, Sfax, Tunisia.
SHIRAZI
A.
Professor, Dpt. of Mech., Ecole Polytechnique de Montréal, Montréal, Canada.
TRABELSI
M.
Graduate student, LASEM, Ecole Nationale d’Ingénieurs de Sfax, Tunisia.
Journal Article
2019
07
07
ABSTRACT<br />Posts are used in various implant designs to contribute to the short- and long- term<br />fixation stability of artificial joints. This study was undertaken to provide further<br />information on the effect of torque loading on the pull-out response of steel post<br />inserted in polymer material. 3 D finite element analysis, using ABAQUS program, were<br />developed on metallic post inserted in polymer cylinder with initial interference under<br />pull-out, torque and combined torque/pull-out loadings. For the polymer cylinder<br />materials we have considered a High Density Polyethylene (HDPE) cylinder with well<br />known mechanical and tribological properties. The predicted ultimate pull-out force<br />undergoes non linear decrease as the applied torque increases. The important<br />decreasing rate was observed when the applied torque exceeded 25 % of the ultimate<br />torque. The radial and shear stresses are significantly changed under pull-out and the<br />combined pull-out/torque forces. The finite element prediction corroborate with our<br />recently experimental results developed on HDPE material. The predicted results of<br />post inserted in polyethylene materials can, therefore, demonstrate the effect of torque<br />loading on the pull-out force.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THE EFFECT OF DROPLETS ON BUOYANCY IN VERY RICH ISO-OCTANE-AIR FLAMES
199
209
39305
10.21608/amme.2008.39305
EN
SULAIMAN S.
A.
Senior Lecturer, Dept. of Mech. Eng., Universiti Teknologi Petronas, Malaysia.
LAWES
M.
Senior Lecturer, School of Mech. Eng., University of Leeds, United Kingdom.
Journal Article
2019
07
07
ABSTRACT<br />An experimental study is performed with the aim of investigating the effect of the<br />presence of droplets in flames of very rich iso-octane-air mixture under normal gravity.<br />Experiments are conducted for initial pressures in the range 100-160 kPa and initial<br />temperatures 287-303 K at an equivalence ratio of 2.0. Iso-octane-air aerosols are<br />generated by expansion of the gaseous pre-mixture (condensation technique) to<br />produce a homogeneously distributed suspension of near mono-disperse fuel droplets.<br />The droplet size varies with time during expansion; hence the effect of droplet size in<br />relation to the cellular structure of the flame is investigated by varying the ignition<br />timing. Flame propagation behavior is observed in a cylindrical vessel equipped with<br />optical windows by using schlieren photography. Local flame speeds are measured to<br />assess the effect of buoyancy in gaseous and aerosol flames. It is found that the<br />presence of droplets results in a much earlier onset of instabilities, at a rate faster than<br />that taken for the buoyancy effect to take place. Flame instabilities, characterised by<br />wrinkling and cellular surface structure, increase the burning rate due to the associated<br />increase in surface area. Consequently, the presence of droplets results in a faster<br />flame propagation rate than that displayed by a gaseous flame. The mechanism of<br />flame instabilities that causes a significant reduction of the buoyancy effect is<br />discussed.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
SIMULATION OF COMPRESSION ENGINE RUNNING ON DIFFERENT TYPES OF FUELS
210
223
39307
10.21608/amme.2008.39307
EN
HAMDAN M.
A.
Professor of Mechanical Engineering, Dept. of Mechanical Engineering. Faculty of
Engineering and technology. University of Jordan.
Journal Article
2019
07
07
ABSTRACT<br />The present work describes a theoretical investigation concerning the performance of a<br />four strokes compression engine, which is powered by alternative fuels in the form of<br />diesel-ethanol and diesel –ether mixtures, the properties of which were sited from<br />literature. The amount of each alcohol added was 5, 10 and 15 % by volume. The<br />engine speed during the experimental work was within the range from 1000 to 4000<br />rpm, with engine was set at full throttle opening and hence the engine was operating<br />under full load conditions. Several parameters were calculated namely; engine torque,<br />brake mean effective pressure, brake power, specific fuel consumption and the thermal<br />efficiency, this was carried out using DIESEL-RK Software.<br />It was found that the engine is of highest thermal efficiency when it is powered by a 15<br />% ethanol-diesel blend, wile it is of minimum thermal efficiency when it is powered by<br />pure diesel fuel.. Further, it was found that both the thermal efficiency of the engine<br />and the specific fuel consumption increases with the percentage of either ethanol or<br />ether in the fuel blend . However, the power was found to decrease with the amount of<br />either ethanol or ether in the fuel blends.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
AN INNOVATIVE METHOD FOR DETERMINING MAXIMUM POWER OBTAINABLE FROM A COMMON RAIL TURBOCHARGED DIESEL ENGINE STARTING FROM EXPERIMENTAL DATA
224
234
39309
10.21608/amme.2008.39309
EN
FRANCIA
D.
PhD student, DIEM aerospace div., University of Bologna, Forlì, Italy.
PIANCASTELLI
L.
Professor, DIEM aerospace div., University of Bologna, Forlì, Italy.
Journal Article
2019
07
07
ABSTRACT<br />This paper presents an experimental method for determining the maximum power<br />obtainable from an aircraft diesel engine derived from the automotive field. Several<br />tests were performed to estimate the real values of pressure and thermal loads on the<br />piston and head. The simple and original method described in this paper made it<br />possible to define two constants for the description of the engine-performanceenvelope.<br />Maximum allowable pressure on the piston and the head was evaluated with<br />computer simulation. Two different indicator cycles of the same engine (in the<br />automotive and aircraft version) were analyzed to extrapolate three constants that<br />define the engine family:<br />• The contributing factor of compression (the exponent of the polytrophic curve n)<br />• The contributing factors of combustion (a constant and an exponent)<br />These contributing factors were examined and quantified separately.<br />The paper is composed of two parts: the first part highlights the ultimate loads on<br />critical engine parts while the second details the method for the extrapolation of the<br />ultimate power output value. Successive experimental tests performed on the engine<br />confirmed the simple method described herein.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
AIRCRAFT PROPULSION SYSTEMS : A DIESEL HYBRID ENGINE
235
245
39311
10.21608/amme.2008.39311
EN
FRANCIA
D.
Graduate student, Dpt. of Mechanical Engineering, Bologna University, Forlì, Italy.
PIANCASTELLI
L.
Professor, Dpt. of Mechanical Engineering, Bologna University, Forlì, Italy.
Journal Article
2019
07
07
ABSTRACT<br />Recent developments in diesel piston engine technology have increased performance<br />in a very significant way. In this paper a new hybrid diesel-turbine engine is introduced<br />and it is compared to up-to-date turboprops. The weak point of the common rail engine<br />is the difficulty to obtain very fast injectors for large engines. Automotive injectors are<br />available only for small power outputs. The problem was solved with a dual chambers<br />piston with two injectors per cylinder. It is then possible to use off-the-shelf automotive<br />common rail components even on very large diesel engines with benefits on<br />combustion especially at medium low power level. The other more interesting<br />advantage is a significant increase on crankshaft maximum speed and reduction of<br />head mechanical stress. It is then possible to have smaller and more powerful<br />turbodiesel and hybrid engines. Another advantage is the improved reliability of a dual<br />injection system. The diesel – turbine hybrid power unit proposed in this paper<br />combines the advantages of the turboprop/turbofan/turboshaft and piston turbo-dieselprop<br />/ turbo-diesel-fan / turbodiesel engines. However, It should be clear than the<br />automotive commercial common rail components should be treated to use jp4, jp8 and<br />jet(A1) fuels and to fulfil aeronautical requirements.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
IMPACT OF VARIABLE INTAKE-VALVE-TIMING ON HOMOGENEOUS CHARGE COMPRESSION IGNITION (HCCI) ENGINE PARAMETERS
246
256
39314
10.21608/amme.2008.39314
EN
MAHROUS A-F.
M.
Ass. Lecturer, Mechanical Power Engineering Dept., Menoufiya University, Shebin El-Kom, Egypt (On
leave), PhD student, Mechanical Engineering Dept, University of Birmingham, UK.
POTRZEBOWSKI
A.
PhD student, Mechanical Engineering Dept, University of Birmingham, UK.
WYSZYNSKI M.
L.
Professor of Novel Vehicle Technology and Applied Thermodynamics, Mechanical Engineering Dept,
University of Birmingham, UK.
XU H.
M.
Reader in Automotive Engineering, Mechanical Engineering Dept, University of Birmingham, UK.
TSOLAKIS
A.
Lecturer in Automotive Engineering, Mechanical Engineering Dept, University of Birmingham, UK.
LUSZCZ
P.
PhD student, Mechanical Engineering Dept, University of Birmingham, UK.
Journal Article
2019
07
07
ABSTRACT<br />The effects of variable intake-valve-timing on the gas exchange process and<br />performance of a 4-valve direct injection HCCI engine were computationally<br />investigated using a 1D fluid-dynamic engine cycle simulation code. A non-typical<br />intake valve strategy was examined; whereby the intake valves were assumed to be<br />independently actuated with the same valve-lift profile but at different timings. Using<br />such an intake valves strategy, the obtained results showed a significant improvement<br />of the engine parameters such as load and volumetric efficiency when compared with<br />those of the typical intake-valve-timing case. Additionally, minimizing the pumping work<br />penalty, and consequently improving the fuel economy, was shown as an advantage of<br />using the non-typical intake-valve-timing with the timing of the early intake valve<br />coupled with a symmetric degree of exhaust-valve-closing timing.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MICROSTRUCTURAL CHARACTERIZATON AND EFFECTS ON MECHANICAL PROPERTIES OF BORON ADDED ARMOR STEELS
50
62
39323
10.21608/amme.2008.39323
EN
KARAGOEZ
S.
Prof . Dr, Dpt. of Metallurgical and Materials Engineering, Kocaeli University, Turkey.
ATAPEK
H.
MSc, Dpt. of Metallurgical and Materials Engineering, Kocaeli University, Turkey.
YILMAZ
A.
Dr., Captain, Turkish Land Forces Command, Off. of Tech. Proj. & Adm., Turkey.
Journal Article
2019
07
07
ABSTRACT<br />The performance of steels depends on the properties associated with their<br />microstructures, that is type, volume fraction, form factor, size and the area distribution<br />of the various phases involved. Because all the phases in steels are crystalline, steel<br />microstructures are made up of various crystals, sometimes as many as three or four<br />different types which are physically blended by solidification, solid-state phase changes,<br />hot deformation, cold deformation and heat treatment. Each type of microstructure is<br />developed to characteristic property ranges by specific processing routes that control<br />the microstructural changes. Thus processing technologies are used to tailor the final<br />microstructure.<br />In this study boron added armor steel has been rolled to form sheet product.<br />Austenitization treatment, rapidly quenching and then tempering at various<br />temperatures and times have been performed on the materials respectively. After all of<br />these operations, the phases of the alloy system formed during equilibrium state have<br />been examined and also their amounts are calculated with Thermocalc. Microstructures<br />formed after different heat treatments have been examined by optical microscopy. The<br />effect of formed microstructures on mechanical properties are comparatively given by<br />strength, toughness and elongation values.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
A FRACTOGRAPHICAL STUDY ON BORON ADDED ARMOR STEEL DEVELOPED BY ALLOYING AND HEAT TREATMENT TO UNDERSTAND ITS BALLISTIC PERFORMANCE
63
76
39319
10.21608/amme.2008.39319
EN
KARAGOEZ
S.
Prof . Dr, Dpt. of Metallurgical and Materials Engineering, Kocaeli University, Turkey.
ATAPEK
H.
MSc, Dpt. of Metallurgical and Materials Engineering, Kocaeli University, Turkey.
YILMAZ
A.
Dr., Captain, Turkish Land Forces Command, Off. of Tech. Proj. & Adm., Turkey.
Journal Article
2019
07
07
ABSTRACT<br />Fractographical examinations present a good relationship between fracture surface<br />topography and basic rupture mechanism. Fracture consists of crack formation (crack<br />nucleation) and crack growth (crack propagation). Many parametres such as type of<br />loading, sensitivity of materials to crack play an important role on failure. Fracture in<br />engineering alloys can occur by a transgranular (through the grains) or an intergranular<br />(along the grain boundaries) fracture path.<br />In this study newly developed boron added armor steel has been rolled to form sheet<br />product. Heat treatment series including austenitization, quenching and then tempering<br />have been applied on boron added armor steel respectively. The effects of formed<br />microstructures on mechanical properties have been studied extensively. Furthermore<br />failure mechanism has been determined through fractografical examinations by using<br />Scanning Electron Microscopy (SEM). due to its high resolution. In general SEM<br />examinations are an important part of failure analysis.<br />Failure analysis and type of fracture provide also a good approach to understand the<br />ballistic behaviour of armor steel. When the material is exposed to any kind of impact<br />loading as performed by kinetic penetrator etc., it is obvious that the failure mode will<br />give information about its ballistic performance.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
COMPUTER MODELLING OF INDUCTION HEATING FOR THE PROCESSES OF SURFACE HARDENING
77
88
39327
10.21608/amme.2008.39327
EN
BEHULOVA
M.
Lecturer, Dpt. of Applied Mechanics, Inst. of Production Systems and Applied
Mechanics, Faculty of Materials Science and Technology in Trnava, Slovak
University of Technology in Bratislava, Slovak Republic.
TARABA
B.
Associate professor, Dpt. of Applied Mechanics, Inst. of Production Systems and
Applied Mechanics, Faculty of Materials Science and Technology in Trnava, Slovak
University of Technology in Bratislava, Slovak Republic.
Journal Article
2019
07
07
ABSTRACT<br />Processes of induction heating for surface hardening are mostly designed using<br />engineering experience and a trial-and-error procedure. In connection with advance in<br />computational technique and numerical methods, computer modelling and simulation<br />are ever more exploited to support design and analysis of induction heat treatment<br />processes. Induction heating represents a complex problem requiring to perform<br />coupled electro-magnetic, thermal and static analyses. In the paper, the methodology of<br />computer modelling and analysis of high-frequency induction heating processes using<br />the program code ANSYS is discussed and applied for the numerical simulation of<br />induction heating of a power cylinder piston.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
PREDICTION OF ENERGY STATES OF THE PROBE DURING QUENCHING IN ISOMAX 166 OIL APPLYING BY EXPERIMENT AND NUMERICAL SIMULATION
89
99
39330
10.21608/amme.2008.39330
EN
TARABA
B.
Associate professor, Department of Applied Mechanics, Institute of Production
Systems and Applied Mechanics, Faculty of Materials Science and Technology
in Trnava, Slovak University of Technology in Bratislava, Slovak Republic.
LAŠČEK
M.
PhD. student, Department of Materials Engineering, Institute of Materials; Assistant,
Department of Applied Mechanics, Institute of Production Systems and Applied
Mechanics, Faculty of Materials Science and Technology in Trnava, Slovak
Journal Article
2019
07
07
ABSTRACT<br />In the article, the computer modelling of the energy states of the probe during<br />quenching process in the Isomax 166 oil is presented. The probe was cooled from the<br />initial temperature of 850 °C. The selected steady-state temperatures of the oil were<br />from 0 °C to 120 °C. The material of the probe was non-stabilized Cr-Ni austenitic<br />stainless steel 1Cr18Ni9. The simulation model involves nonlinear thermophysical and<br />thermomechanical material properties. Cooling curves were obtained using the<br />methodology of Wolfson test. Based on the numerical simulation of a cooling process<br />and experimental temperature measurement, the combined heat transfer coefficient<br />was calculated. To determine the combined heat transfer coefficient as a function of<br />probe surface temperature, the inverse-numerical-correlation method was applied. The<br />time histories of thermal elastic and plastic stress states, time dependences of residual<br />stresses and volume plastic work as a function of chosen temperature of quenching oil<br />were analysed using the finite element method and the engineering-scientific program<br />code ANSYS.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
AN INVESTIGATION OF THE EFFECT OF WORKING GAS TYPE ON MORPHOLOGICAL FEATURES OF THE DEPOSITED LAYERS ON A STEEL ALLOY PRODUCED BY IMPULSE PLASMA DEPOSITION TECHNIQUE
100
114
39334
10.21608/amme.2008.39334
EN
RASHAD M.
M.
Egyptian Armed Forces.
HASSAN M.F.
A
Egyptian Armed Forces.
HASSAN K.A.
A.
Egyptian Armed Forces.
OSMAN M.
M.
Egyptian Armed Forces.
Journal Article
2019
07
07
ABSTRACT<br />This paper is concerned with the nature and morphology of deposited Carbon - Alumina<br />coatings produced under various discharging conditions of the Impulse Plasma<br />Deposition (IPD) process. The deposition of the coating material was carried out on a<br />non-heated steel substrate by means of plasma pulses generated from a coaxial<br />plasma gun. The pulsed plasma mainly consists of two kinds of ions: working gas ions<br />and inner electrode ions. Coatings were produced by a number of plasma pulses (50 -<br />200) from 15.42 μF capacitor bank at 13.5 kV discharging voltage. The microstructure<br />of the deposited films was observed using scanning electron microscope (SEM).<br />Structural features were greatly affected by the type of the working gas which controls<br />the ionization potential. Using the Acetylene (C2H2) only as a working gas produces a<br />layer of graphite and coarse alumina particles (AL2O3) with non uniform distribution.<br />Mixing the used gas with a molecular gas (either N2 or H2) enhances the ionization and<br />gives more uniform distribution of finer alumina particles.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
AN ASSESSMENT OF SEMI-ACTIVE SUSPENSION FOR PASSENGER CARS USING FULL CAR MODEL
1
14
39338
10.21608/amme.2008.39338
EN
IHSAN S.
I.
Graduate Student, Mechanical Engineering Department, International Islamic University
Malaysia, Malaysia.
FARIS W.
F.
Assistant Professor, Mechanical and Mechatronics Engineering Departments, International
Islamic University Malaysia, Malaysia.
AHMADIAN
M.
Professor, Mechanical Engineering Department, Virginia Polytechnic and State University,
USA.
Journal Article
2019
07
07
ABSTRACT<br />Several control policies of F-car 7-DOF semiactive system, namely skyhook,<br />groundhook and hybrid controls are presented, as a continuation of the previous work<br />on Q-car 2-DOF and H-car 4-DOF models. Their ride comfort, suspension displacement<br />and road-holding performances are analyzed and compared with passive system. The<br />analysis covers both transient and steady state responses in time domain. The results<br />show that the hybrid control policy yields better comfort than a passive suspension,<br />without reducing the road-holding quality or increasing the suspension displacement for<br />typical passenger cars. The hybrid control policy is also shown to be a better<br />compromise between comfort, road-holding and suspension displacement than the<br />skyhook and groundhook control policies.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
ANAYSIS AND CONTROL LAWS OF SEMI-ACTIVE VEHICLE SUSPENSION SYSTEMS WITH RENDING AN ACCOUNT OF THE PHYSICAL CHARACTERISTICS OF MAGNETO-RHEOLOGICAL DAMPERS
15
31
39370
10.21608/amme.2008.39370
EN
GENOVE
J.
Associate professor, Dpt. of Mech., Technical University, Sofia, Bulgaria.
TASHKOV
S.
Assistant professor, Dpt. of Mech. Power, Technical University, Sofia, Bulgaria.
TRAYKOV
B.
Professor, Dpt. Transport Technologies, Technical University, Sofia, Bulgaria.
ARNAUDOV
K.
Professor, Dpt. Mech., Technical University, Sofia, Bulgaria.
VENKOV
G.
Professor, Dpt. Mech., Technical University, Sofia, Bulgaria.
Journal Article
2019
07
07
ABSTRACT<br />In the paper, comparative analysis of the semi-active suspension systems<br />effectiveness towards the passive ones is studied. Several control laws are<br />investigated depending on the analyses goals–comfort increasing, stability<br />improvement or a realized compromise between them. There are suggested few<br />implemented controller types, and their effectiveness is discussed. The influence upon<br />the effectiveness of the damper nonlinear physical model is analyzed.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MIXED-REALITY ENVIRONMENT FOR ONLINE SYSTEM IDENTIFICATION OF NONLINEAR SYSTEMS
32
43
39373
10.21608/amme.2008.39373
EN
ASHRAF I.
S.
Assistant professor, Dpt. of
Mechatronics, Philadelphia University, Amman, Jordan.
SABER
A.
Associate professor, Dpt. of
Mechatronics, Philadelphia University, Amman, Jordan.
TAREK
T.
Assistant professor, Dpt. of
Mechatronics, Philadelphia University, Amman, Jordan.
Journal Article
2019
07
07
ABSTRACT<br />This paper presents a method to identify non-linear-systems in a real time environment.<br />Acquiring the system's transfer function accurately could be extremely difficult once it<br />has been assembled, which causes a great difficulty in the non-linear system modeling<br />and control. Therefore in this research, Mixed Reality Environment (MRE) has been<br />employed to identify the system's transfer function using Auto-Regressive Moving<br />Average (ARMAX) model algorithm in order to avoid the complexity associated with<br />nonlinear systems modeling. Online system identification can be conducted effectively<br />and efficiently using the proposed method. The advantages of the proposed method are<br />high accuracy in the identified system, simplicity, and low cost. The results obtained<br />from on line experimental measured data are used to determine discrete transfer<br />function of the system, 4th order model with one step prediction shows best<br />performance.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
NON-PARAMETRIC MODEL FOR EMULATING MAGNETORHEOLOGICAL DAMPER BEHAVIOR
44
54
39374
10.21608/amme.2008.39374
EN
ELTANTAWIE M.
A.
Lecturer, Dpt. of Mech. Engineering, Higher Technological Institute, October
Branch, Giza, Egypt.
Journal Article
2019
07
07
ABSTRACT<br />The magnetorheological damper allows variable control of energy dissipation in a<br />simple design. Rapid response time and efficient power requirements make the device<br />one of the most effective means possible for interfacing mechanical components with<br />electrical controls. These properties are due to the MR fluids ability to change from a<br />free-flowing liquid to a semisolid in milliseconds when exposed to a magnetic field, and<br />instantly back to a liquid when the field is removed. But highly nonlinear dynamic<br />behavior is a significant challenge for applying to a control system. Research by others<br />has shown that a system of nonlinear differential equations can successfully be used to<br />describe the behavior of a MR damper. The paper presents a neuro fuzzy model for 0.3<br />ton MR-damper using Adaptive Neuro-Fuzzy Inference system (ANFIS). The results<br />show that the neuro fuzzy model can predict the force of the damper for different<br />excitation amplitudes and frequencies
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
SIMULATION OF ACOUSTIC GENERATION AND PROGRESSION IN A CLOSED CHAMBER
1
9
39376
10.21608/amme.2008.39376
EN
MOHD-GHAZALI
N.
Faculty of Mechanical Engineering, University Teknologi Malaysia, Malaysia
FAX: 07-5566159.
McHUGH J.
P.
Department of Mechanical Engineering, University of New Hampshire, Durham,
NH 03824, USA.
Journal Article
2019
07
07
ABSTRACT<br />Theoretical and experimental studies in thermoacoustics successfully explained the<br />phenomena with linear inviscid theory at lower oscillation amplitudes. The theory is<br />inadequate at higher oscillations because of dominant nonlinear and multidimensional<br />effects. This study is part of a research into the simulation of the nonlinear behavior of fluid<br />in an acoustic chamber at near incompressible flow. A time-dependent compressible<br />Navier-Stokes system was solved for a two-dimensional rectangular chamber with a<br />membrane and a closed end on the other. The generation and progression of the<br />simulated velocity field observed is significantly complex which include beatings, vortex<br />motions, and cross-waves, among others. Computations have shown vortex shedding<br />behavior near the membrane acoustic driver as well as near heat exchanging plates when<br />they are included for both pure Helium and mixtures. Simulations also showed acoustic<br />streaming, a secondary flow forced by the acoustic waves. Quantitatively small, the<br />streaming flow increases steadily with time. The paper reports the simulation results<br />obtained. These complexities have only been previously reported independently and to<br />date many open questions still remain on some issues.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
A MALAYSIAN PORTABLE THERMOACOUSTIC REFRIGERATOR SYSTEM
10
17
39380
10.21608/amme.2008.39380
EN
MOHD-GHAZALI
N.
Faculty of Mechanical Engineering, University Teknologi Malaysia, Malaysia
FAX: 07-5566159.
CHENG C.
F.
Curtin University of Technology Sarawak Campus, Sarawak, Malaysia.
NURUDIN
S.
Faculty of Mechanical Engineering, University Teknologi Malaysia, Malaysia
FAX: 07-5566159.
Journal Article
2019
07
07
ABSTRACT<br />The discovery that thermoacoustic phenomena can generate cooling for refrigeration<br />has escalated research into thermoacoustic heat engine and refrigeration systems<br />since the late twentieth century in developed countries. The simplicity of the<br />thermoacoustic systems and its environmentally friendly operations has encouraged<br />researchers in Malaysia to develop similar systems for specific purposes. A portable<br />thermoacoustic refrigerator prototype using pure Helium as the working fluid was<br />designed, fabricated and tested for thermoacoustic cooling effects. Based on the<br />standing wave system with sinusoidal resonator geometry, a temperature drop was<br />obtained repeatedly and consistently with cooling effects lower than the ambient when<br />operating only at 1 atmospheric pressure. This paper reports the theory behind the<br />design and fabrication procedure with initial temperature drop of 20K obtained from the<br />first thermoacoustic refrigerator in Malaysia. Investigations into different geometry stack<br />and the complete refrigerator system are underway to study the optimum performance<br />that can be obtained.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
SIX-PORT MODEL FOR SOUND PROPAGATION IN A POROUS MEDIA WITH APPLICATION TO DIESEL PARTICULATE FILTERS
18
31
39382
10.21608/amme.2008.39382
EN
HAMDAN M.
N.
Full Professor, Dpt. of Mechanical Engineering, University of Jordan, Amman, Jordan
university.
FAYYAD S.
M.
Assistant Professor, Dpt. of Mechatronics, Albalqa Applied University, Alsalt, Jordan.
HAMDAN M.
A.
Full Professor, Dpt. of Mechanical Engineering, University of Jordan, Amman, Jordan
university.
Journal Article
2019
07
07
ABSTRACT<br />This work presents a 2-D field model for the study of sound propagation in a diesel<br />particulate filter (DPF) unit. The 2-D model is formulated using the field Navier-stocks,<br />energy, and continuity equations and retains the normal as well as transverse<br />component of gas velocity. Temperature, pressure, density, and velocities are taken to<br />be as plane and time harmonic variations. By substituting the differentials of these<br />quantities with respect to both plane and time in field equations, a set of three coupled<br />linear 2-D field variation equations for pressure, axial and transverse velocities is<br />obtained. The obtained model is solved analytically using Fourier series<br />approximations. The approximate solution is used to build a 2D acoustic model for the<br />exhaust gases emission, with the existence of the diesel particulate filter, which<br />accounts for both attenuation and phase shift defining the propagation wave constant.<br />In addition the obtained approximate solution is used to determine the acoustics<br />impedance of the DPF unit, comparing between different types of DPF based on sound<br />transmission losses performance, soot loading, noise and vibration damping, in addition<br />to calculating the noise reduction factor (NRF). In the present study, unlike previous<br />ones, six, rather than four, roots for wave propagation constant are obtained<br />corresponding to the obtained six port acoustic DPF model. The results obtained using<br />the present six -port model, for selected system parameters are graphically displayed<br />and compared with those available in the open literature using four- port models. The<br />present model results show, in general, similar qualitative behavior and a significant<br />quantitative improvement of the available results in the open literature obtained using a<br />four port model.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THE USING OF POLYURETHANE FOAMS INSIDE AIRCRAFT FUSELAGE AS ACOUSTIC INSULATION
32
38
39384
10.21608/amme.2008.39384
EN
JURICKA
M.
Graduate student, Department of Physics and Material Engineering, Tomas Bata
University in Zlin, Czech Republic.
LAPCIK L.
Jr.
Professor, Department of Physics and Material Engineering, Tomas Bata University
in Zlin, Czech Republic.
Journal Article
2019
07
07
ABSTRACT<br />The paper is focused on problematic of noise inside a fuselage of one propeller<br />aeroplane. The aim of this paper is to analyse the noise produced by engine located in<br />front of cabin for two passengers and also to show an application of specific<br />polyurethane as an insulation layer. There were a sound absorption coefficient; a sound<br />reflection coefficient and a sound pressure level are the most important of acoustic<br />values. The measurements were made in laboratory and in aeroplane. The final<br />interpretation depends on test results.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
DETECTING STICK-SLIP OCCURRENCE BY NEAR FIELD NOISE MEASUREMENTS
39
49
39385
10.21608/amme.2008.39385
EN
GHAZY M.R.
A.
Department of Mechanical Engineering Design, Faculty of Engineering, Zagazig University.
EL-HADY A.
M.
Department of Space Science, National Authority of Remote Sensing and space Science,
Egypt.
Journal Article
2019
07
07
ABSTRACT<br />The present study is concerned with evaluating the pin-on-disk test rig usage and the<br />measurements conducted in recognizing the occurrence of stick-slip phenomenon. The<br />test rig consists of two separate blocks to ensure that the vibration of the elastic disk<br />and the emitted noise are completely adverted to friction between the moving pin and<br />the stationary steel disk.<br />The occurrence of stick slip is clearly picked up using the near field noise<br />measurements. It can be distinguished from the vibration signal as high consecutive<br />spikes, but the existence of these spikes is clearer and more definite in the noise<br />signature.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
COMBINED EFFECT OF INCIDENCE - FOREBODY ANGLES ON THE FLOW STRUCTURE INSIDE SPIKED SUPERSONIC INTAKES
257
272
39387
10.21608/amme.2008.39387
EN
AL-KAYIEM H.
H.
Associate Professor, Mech. Eng. Dept., Universiti Teknologi PETRONAS, Bandar
Seri Iskandar, 31750 Tronoh, Perak,Malaysia.
SALIH T.
W.
Assistant Lecturer, Mech. Eng. Dept. Al-Mustansiriyah University, Baghdad, Iraq,
Tel.: +964 770 254 1260.
Journal Article
2019
07
07
ABSTRACT<br />A high static pressure at the inlet face and minimal total pressure loss at the intake<br />entry are required for an efficient operation of the spiked supersonic jet engines. The<br />turning (Forebody) angles are optimized for a maximum total pressure recovery at the<br />intake entry for the design Mach number condition, so that the compression shocks fall<br />on the cowl lip. Non zero incidence angle changes the effective deflection angle up and<br />down the spike, so the combining effect of incidence and forebody angles is essential<br />for the intake performance. The present analysis investigates the pressure distribution<br />at the compressor face at different forebody-Incident combinations at different<br />supersonic fly speeds ranging from 1.8 to 2.2 Mach. The numerical analysis is carried<br />out under 2-D, steady and viscous flow assumptions. The external flow, which consists<br />of the set of waves, is solved analytically. CFD analysis using Control Volume<br />Formulation technique is applied to analyze the internal flow. In house program is built<br />to solve the governing sets of equations by using SIMPLE algorithm. The analyses are<br />carried out at incidence angles ranging from 0o to 10o and forebody angles ranging from<br />6o to 25o. The procedure has been verified by comparing with previous experimental<br />results. The results obtained have generally shown, that the pressure recovery<br />increases by the increasing of the wedge angle and decreases by increasing of<br />incidence angle. In some operating conditions, the combination of the three factors,<br />Mach no., the incidence, and the forebody angle results in a complicated mechanism<br />due to the presence of compression and expansion waves in the external part of the<br />intake simultaneously.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
ON THE NON-ISENTROPIC SOUND WAVES PROPAGATION OF A STATIONAY OR FLOWING FLUID IN A CYLINDERICAL TUBE FILLED WITH POROUS MEDIA
273
284
39389
10.21608/amme.2008.39389
EN
DUWAIRI H.
M.
Mechanical Engineering Department, Faculty of Engineering & Technology, The University
of Jordan, 11942 Amman, Jordan.
Journal Article
2019
07
07
ABSTRACT<br />It is shown that the five parameters governing the propagation of sound waves in a fluid<br />contained in rigid cylindrical tubes filled with a saturated porous media are the shear<br />wave number s = R ρω / μ , ratio of specific heats γ , the Prandtl number σ , porosityε<br />and the Darcy number Da = R2 K . A variational solution of the problem with nonisentropic<br />wave’s propagation in a cylindrical tube in the presence and absence of a<br />convective steady flow is presented. The manner in which the flow influences the<br />attenuation and the phase velocity of the forward and backward propagating acoustic<br />waves is deduced. It is found that the inclusion of the solid matrix or the increasing of<br />Darcy number increases the attenuation and decreases the phase velocities of the<br />forward, backward and hydrodynamic sound wave’s; this is due to favorable retarding<br />effect of the solid matrix. The increasing of porosity is found to decrease attenuation<br />and increases phase velocities of the forward, backward and hydrodynamic sound<br />waves; this is due to absent role of solid matrix in damping sound waves. The effect of<br />increasing Mach numbers is found to increase attenuation and decrease phase<br />velocities for the backward sound waves; this is due favorable retarding steady flow<br />velocities and decrease attenuation and increase phase velocities of the forward and<br />hydrodynamic sound waves; this is due to favorable steady flow velocities in driving<br />these two sound waves.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EXPERIMENTAL AND COMPUTATIONAL INVESTIGATION OF THE AERODYNAMICS OF A SUPERSONIC PROJECTILE WITH STREAMWISE SLOTS
285
313
39392
10.21608/amme.2008.39392
EN
IBRAHIM
A.
Egyptian Armed Forces.
FILIPPONE
A.
Lecturer, School of Mechanical, Aerospace and Civil Engineering, University of Manchester,
Manchester, U.K.
Journal Article
2019
07
07
ABSTRACT<br />The present paper investigates the effect of streamwise slots applied to the boattail<br />section of a projectile at supersonic speeds. Experimental work was performed to show<br />the effect of the slots on the drag at Mach numbers M=1.36, 1.65 and 1.83. A single<br />configuration of the slot pattern was used with two different slot widths (0.5mm and<br />2.0mm). The physics of the cavity flow was computationally investigated as well as the<br />effect of the slots on the overall aerodynamic drag. Unlike the case of streamwise slots<br />at transonic speeds, the suction and blowing mechanism is absent at supersonic<br />speeds. It was found that there is a significant base drag reduction due to the presence<br />of the streamwise slots. The reduction in total drag is modest when the width is<br />W=0.5mm. However, the experiments showed that the drag increases at Mach<br />numbers ranging from 1.36 to 1.83 for a slot width W=2.0mm.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EFFECTS OF OSCILLATORY PLUNGING MOTION ON ROTARY WING BLADES
314
323
39393
10.21608/amme.2008.39393
EN
ABOURAHMA A.
A.
Ph. D Head of ARC Engineering Department. Cairo, Egypt.
Journal Article
2019
07
07
ABSTRACT<br />The effect of blade oscillation on resulting air loads has promoted new interest in<br />oscillatory blade aerodynamics. Rotary wings aerodynamics is considerably more<br />complex than fixed wing aerodynamics. As an airfoil performs an oscillation, vortices<br />are shed into the medium with a circulation strength equal in magnitude to the increase<br />in circulation about the airfoil but opposite in direction. These disturbances are stored in<br />the fluid because the shed vorticity convicts down stream at a local flow field velocity.<br />The wake of the rotor consists of helical vortex sheet below the rotor b1ades. The wake<br />remains near the rotor and therefore passes close to the following blades.<br />The fundamental closed form solution of Theodorsen [1], and Lowey [2], provide the<br />basis for theoretical work in this area. The closed form theory shows rapid changes in<br />the lift deficiency function with changes in reduced frequency, wake spacing and<br />frequency ratio. In the past, emphasis in the study of unsteady aerodynamics has<br />tended to focus on flutter instability and the effect of unsteady aerodynamics on<br />generating lift and torsional loads. The classic reference on this subject is that by<br />Garrick [3]. While Garrick's work shows that an airfoil oscillating in pitch will typically<br />produce drag in the lower reduced frequency range, k, it is found that the presence of<br />another layer of shed vorticity of the proper phase can reduce the drag on plunging<br />airfoils and depending upon wake spacing, reduced frequency and phase, may even<br />enhance the propulsive force acting on the plunging airfoils.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MODELISATION OF THERMOELASTIC LINEAR BEHAVIOUR OF TUNGSTEN FILAMENTS IN TWIN HELICAL SPRING CONFIGURATION
128
143
39397
10.21608/amme.2008.39397
EN
BENGHANEM
N.
Assistant professor, Faculté des sciences de la nature et de la vie. Université de
Bejaia 06000 ALGERIA.
KAOUA
S.
Assistant professor, Faculté de génie Mécanique et de génie des procédés
USTHB ALGER16000 ALGERIA.
BECHEUR
A.
Assistant professor, Laboratoire de Technologie des Matériaux et de Génie des
Procédés LTMGP. Université de Bejaia 06000 ALGERIA.
AZZAZ
M.
Professor, Faculté de génie Mécanique et de génie des procédés USTHB
ALGER16000 ALGERIA.
Journal Article
2019
07
07
ABSTRACT<br />By trying to increase the luminosity or the life expectancy of an incandescent lamp, an<br />idea consists of a series of successive rolling up of the tungsten filament. This gives<br />geometrical configurations of filaments named simple, twin, or triple helical spring, etc.<br />In this paper, we will limit only to the case of the twin helical spring filament. Under the<br />combined effects of the high temperature and the stresses induced by its own weight,<br />the filament creeps by becoming plastically deformed in a permanent and a<br />continuously manner, until the rupture. The theoretical study of the behaviour of these<br />filaments needs the knowledge of internal loads distribution, deformations modes, and<br />their evolutions. The present work consists on an elastic structural analysis which must<br />be the first step. Since the objective is also to study the influence of the filament self<br />weight solicitation, the orientation with respect to gravitational direction should be taken<br />into account. Numerical results are obtained by finite element method. They showed a<br />negligible influence of the solicitations due to the variation of the temperature with<br />respect to those of the self weight, and a relative sensitivity to the position changes. For<br />the case of a vertical position, an analytical method has also been developed. Because<br />of some difficulties, the comparison between the numerical and analytical results could<br />not be carried out directly. However, the analytical approach proved to be qualitatively<br />useful for the analysis of numerical results.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THE HEAT DEFORMATION ANALYSIS IN BRIDGE CARRIER
144
153
39401
10.21608/amme.2008.39401
EN
TAECHAJEDCADARUNGSRI
S.
Researcher, Industry/University Cooperative Research Center (I/UCRC) in HDD
Component, Khon Kaen University, Khon Kaen 40002, Thailand.+
Assistant Professor, Dpt. of Mechanical Engineering, Khon Kaen University , Thailand. (Corresponding Author.
SAENSUMRONG
K.
Graduate student, Dpt. of Mechanical Engineering, Khon Kaen University, Khon
Kaen 40002, Thailand.
HORMDEE
D.
Researcher, Industry/University Cooperative Research Center (I/UCRC) in HDD
Component, Khon Kaen University, Khon Kaen 40002, Thailand.+
Assistant Professor, Dpt. of Computer Engineering, Khon Kaen University, Khon
Kaen 40002, Thailand.
Journal Article
2019
07
07
ABSTRACT<br />Bar lapping is a key process in Slider Micro-Fabrication Process of Hard Disk Drive<br />(HDD) industry. The purpose this process is to remove a small amount of material so<br />that the transducer Sensor Height (SH) variation across the bar is minimized. One of<br />the main problems occurred during the lapping process is bar bowing, which damages<br />both ends of slider bar causing the difficulty to control SH. In this study, the commercial<br />ANSYS software is employed to evaluate the bar bowing profiles before and after the<br />design improvement. Before the lapping process, the slider bar needs to be mounted<br />on a bridge carrier with the wafer gripper, which functions as an adhesive between<br />these two parts. The bridge carrier with wafer gripper and bar is then heated up in an<br />oven in order to melt the adhesive for the bonding process. In this process, the bridge<br />carrier is expanded and consequently causes the bar bow problem. In order to solve<br />the problem, the stainless bar is inserted into the bridge carrier for the reinforcement.<br />The results from the finite element model show that the deflection of the bar is reduced<br />by 38%. The actual data of bar bow profile before the reinforcement is measured from<br />the field. The results are similar to the profiles simulated via FEM. As a result, the<br />conclusions from FEM could be applied as a guideline to the new bar lapping<br />development.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
INTERLAMINAR FRACTURE TOUGHNESS OF MULTI-LAYER WOVEN SILK FIBRE/POLYESTER COMPOSITES
154
162
39403
10.21608/amme.2008.39403
EN
ZULKIFLI
R.
Senior Lecturer, Department of Mechanical & Materials Engineering, Universiti Kebangsaan Malaysia.
UCHENNA A.
U.
Graduate student, Department of Mechanical & Materials Engineering, Universiti Kebangsaan Malaysia.
PEI K.
S.
Undergraduate student, Department of Mechanical & Materials Engineering, Universiti Kebangsaan Malaysia.
AZHARI C.
H.
Professor,
Department of Mechanical & Materials Engineering, Universiti Kebangsaan Malaysia.
Journal Article
2019
07
07
ABSTRACT<br />The effect of the number of layers of woven silk fibre on the interlaminar fracture<br />toughness of silk/polyester composites which is a measure of the resistance of the<br />material to delamination crack propagation has been studied. The multi-layer woven silk<br />fibre/polyester composites were produced by compression moulding technique with<br />increasing layers of silk of between 8 and 14 layers in thermoset polyester. The<br />composite panels have been tested for mode I interlaminar fracture using double<br />cantilever beam specimens (DCB) testing method. It was found that the interlaminar<br />fracture toughness, GIC of the composite increases as the number of silk fibre layers<br />increases. Stable crack propagation is observed during the tests and the crack<br />propagation areas showed all the fibres were bare with no matrix covering them as<br />were seen at 100x and 500x magnification using SEM. Failure occurred at the fibrematrix<br />interface with no fibre bridging observed between the two fracture surfaces. The<br />smooth clean surface of the silk fibres is the result of poor interfacial debonding and the<br />increases in interlaminar fracture toughness is also due to improve strength of the<br />composites panel.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
AERO-THERMO-MECHANICAL CHARACTERISTICS OF SHAPE MEMORY ALLOY HYBRID COMPOSITE PANELS WITH GEOMETRIC IMPERFECTION
163
176
39405
10.21608/amme.2008.39405
EN
IBRAHIM H.
H.
Assistant Professor, Space Division, National Authority for Remote Sensing and
Space Sciences, Cairo, Egypt.
TAWFIK
M.
Assistant Professor, Mechanical Department, British University in Egypt, Cairo,
Egypt.
Journal Article
2019
07
07
ABSTRACT<br />A new nonlinear finite element model is presented for the static aero-thermal deflection<br />of a shape memory alloy (SMA) hybrid composite panel with initial geometric<br />imperfection and under the combined effect of thermal and aerodynamic loads. The<br />nonlinear governing equations are obtained using Marguerre curved plate theory and<br />the principle of virtual work. The effect of large deflection is included in the formulation<br />through the von Karman nonlinear strain-displacement relations. To account for the<br />temperature dependence of material properties, the thermal strain is stated as an<br />integral quantity of the thermal expansion coefficient with respect to temperature. The<br />aerodynamic pressure is modeled using the quasi-steady first-order piston theory. The<br />Newton-Raphson iteration method is employed to obtain the nonlinear aero-thermal<br />deflections, while an Eigen value problem is solved at each temperature and static<br />aerodynamic load to predict the free vibration frequencies about the deflected<br />equilibrium position. Finally, the nonlinear deflection and free vibration characteristics of<br />a SMA hybrid composite panel are presented, illustrating the effect of SMA fiber<br />embeddings, temperature rise, dynamic pressure, boundary conditions and an initial<br />geometric imperfection on the panel response.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
FINITE ELEMENT ANALYSIS OF COMPRESSOR BLADES UNDER EXTENSION, BENDING, AND TORSION LOADS
177
195
39408
10.21608/amme.2008.39408
EN
FARID A.
M.
Egyptian Armed Forces.
ELSHAFEI M.
A.
Egyptian Armed Forces.
KOUSA
S.
Egyptian Armed Forces.
Journal Article
2019
07
07
ABSTRACT<br />The objective of this research is to develop a finite element model for the analysis of the<br />dynamic as well as the static response of a compressor blade made of composite<br />materials subjected to extension, transverse, and torsion loads. The equation of motion<br />is derived based on the variation technique with the principle of the total potential<br />energy of a laminated fiber reinforced structures with different fiber orientation angles.<br />The formulation is based on the classical laminate theory and the warping effect is<br />taken into consideration. A one dimensional linear isoperimetric element with Lagrange<br />and hermit cubic shape function are used to model the axial and transverse<br />deformation. A two end nodes and one intermediate node as well is implemented for<br />modeling the torsion deformation. The bending – torsion and axial coupling are<br />introduced in the stiffness and mass matrices. The obtained results of the present<br />model are compared to the available finite element and analytical results of others<br />investigators, a good agreement is generally obtained.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
BASE CONDITIONS OF MULTISPINDLE HEAD DESIGN
61
67
39410
10.21608/amme.2008.39410
EN
HRUŠKOVÁ
E.
Research worker, Institute of Production Systems and Applied Mechanics, Slovak
University of Technology, Rázusova 2, 917 01 Trnava, Slovak Republic.
VELÍŠEK
K.
Professor, Rázusova 2, 917 01 Trnava, Institute of Production Systems and Applied
Mechanics, Slovak University of Technology, Slovak Republic.
KOŠŤÁL
P.
Assoc. Prof., Institute of Production Systems and Applied Mechanics, Rázusova 2,
917 01 Trnava, Slovak University of Technology, Slovak Republic.
Journal Article
2019
07
07
ABSTRACT<br />In this article, the structural relations between particular multispindle head parts are<br />analyzed. The accurate principles and calculations create the base conditions for the<br />development of an optimal engineering design of multispindle operational heads<br />(MSOH). These conditions are the same as required from MSOH producer by users.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
COMPUTER SIMULATION OF BLANKING PROCESS
68
80
39413
10.21608/amme.2008.39413
EN
AHMED
A.
Professor, Institute of Manufacturing Engineering, Navy Engineering College,
National University of Sciences and Technology, Karachi, Pakistan.
HASMIRA
HASMIRA
Professor, Institute of Manufacturing Engineering, Navy Engineering College,
National University of Sciences and Technology, Karachi, Pakistan.
Journal Article
2019
07
07
ABSTRACT<br />Blanking process can be simulated on computer and it will aid in die , punch design and<br />press selection. Further effect of punch wear on fracture height and bur height in blank<br />can be ascertained by simulation. This paper demonstrates the blanking process by<br />simulation using ABAQUS v 6.4. For a 2mm mild steel sheet the simulation shows that<br />for the punch force of 240 kN the crack starts at 30% punch penetration depth and<br />punch force suddenly drops to value of 70kN and remains steady till the blanking is<br />complete. In the elastic plastic range the experimental and simulation results agree well<br />with rising punch force up to the point of creation of crack, however there is slight<br />discrepancy in the down fall of force with depth of penetration of punch. With increase<br />of the thickness of sheet the crack height is reduced and blank quality is improved.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THICK AND WELL ADHERENT CARBON LAYERS FOR AUTOMOTIVE INDUSTRY
82
88
39415
10.21608/amme.2008.39415
EN
BATORY
D.
Institute of Materials Science and Engineering, Technical University of Lodz,
ul. Stefanowskiego 1, 90 – 924 Lodz, Poland.
CLAPA
M.
Institute of Materials Science and Engineering, Technical University of Lodz,
ul. Stefanowskiego 1, 90 – 924 Lodz, Poland.
MITURA
S.
Institute of Materials Science and Engineering, Technical University of Lodz,
ul. Stefanowskiego 1, 90 – 924 Lodz, Poland.
Journal Article
2019
07
07
ABSTRACT<br />Diamond-like carbon (DLC) layers due to their good mechanical properties are a very<br />interesting material for many industrial applications. But to thick DLC layer results in<br />high internal stress, and is the reason of problems, connected with their poor adhesion<br />and self delamination processes. This problem is widely discussed in world literature.<br />Despite of their very good friction parameters very often the maximum thickness<br />possible to obtain is not sufficient to be applied. Authors of this work propose<br />improvement of adhesion and increase of the thickness of carbon layers by the<br />deposition of Ti inter and buffer layer between the substrate surface and the carbon<br />layer on the top. Specially to that purpose a new apparatus was designed, which is the<br />connection of impuls magnetron sputtering and plasma assisted chemical vapor<br />deposition in one reaction chamber. Gradient layers were deposited on typical materials<br />which are used in automotive industry and work under friction conditions. Manufactured<br />layers were investigated on SEM and AES, friction coefficient and wear resistance was<br />measured by ball – on – disc method. As the result of investigation it was noticed that<br />carbon layers manufactured in new deposition system are very promising material for<br />automotive applications. It was possible to obtain thick and well adherent DLC layers<br />with keeping of their very good friction parameters.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
ASSESSING THERMAL VARIATION IN BENCH AND CAROUSELTYPE PRODUCTION TOOLS
89
96
39417
10.21608/amme.2008.39417
EN
ABDUL-RANI A.
M.
Senior Lecturer, Dept. of Mech. Eng., Universiti Teknologi Petronas, Malaysia.
AHMAD
F
Associate Professor, Dept. of Mech. Eng., Universiti Teknologi Petronas, Malaysia.
MURAD M.
N.
Lecturer, School of Manufacturing Engineering, Universiti Malaysia Perlis, Malaysia.
Journal Article
2019
07
07
ABSTRACT<br />Uniform mould temperature is very much desired in foam production tools. Mould<br />temperature variation can result in low part quality. It is suspected that uniform mould<br />temperature is not achieved during foam moulding process. A series of experiments<br />was conducted to assess production tools’ mould surface temperature. The work was<br />performed to quantify any temperature variations in existing production tools. It was<br />also intended as a preliminary inspection of any effects on flexible PU foam part quality<br />resulting from tool temperature variations. Experiments were conducted on bench and<br />carousel-type moulds at an industrial plant using non-contact and contact technique to<br />measure and quantify the mould surface temperature. A grid of locations and features<br />on the mould surface are identified and temperature recordings were conducted a<br />number of times for each spot. Distance between mould surface and heating channels<br />for each spot are also noted. It was found that there exists a mould surface temperature<br />variation between 40C to 80C on some parts of the mould surface. The locality where<br />the mould surface was lower coincided with a negative effect on the final part such as<br />scaling and shrinks mark. It was established through experimental results that the<br />mould surface temperature was affected by the distance from the heating channel to<br />the mould surface. Consequently a uniform distance between heating channel and<br />mould surface was proposed to be incorporated in the design of future production tools<br />to attain a uniform mould surface temperature
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MODELLING OF LIGHT RANGE COMMERCIAL VEHICLE PROPELLER SHAFTS UNDER DYNAMİC EFFECTS
1
11
39643
10.21608/amme.2008.39643
EN
TAYMAZ
I.
Professor, Engineering Faculty, Sakarya University, Sakarya-Turkey.
CAKIR
K.
Professor, Engineering Faculty, Sakarya University, Sakarya-Turkey.
GUNEY
B.
Professor, Engineering Faculty, Sakarya University, Sakarya-Turkey.
GUNDOGAR
E.
Professor, Engineering Faculty, Sakarya University, Sakarya-Turkey.
CETINER
I.
Graduate Student, Engineering Faculty, Sakarya University, Sakarya-Turkey.
Journal Article
2019
07
08
ABSTRACT<br />Propeller shafts are the main components of a vehicle that transmit power from gearbox<br />flange to differential flange enabling the wheels of the vehicle to rotate. Depending<br />upon the vehicle geometry and dimensions the vehicle might have one or more<br />propeller shafts at a time. In case of two or more shaft usage, most of the time the shaft<br />connected to gearbox flange has no length compensation while the latter one does.<br />In this study front and rear propeller shafts of a selected vehicle have been analysed as<br />finite element models under the effects of torque transmitted from gearbox. Various<br />levels of torque values have been considered and stress analysis have been made.<br />Additionally the angle between shaft axes has been altered to find Von-Mises stress<br />levels. Finally fatigue criteria have been used to find fatigue life expectancy of shafts.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
HISTORICAL REVIEW OF VARIABLE VALVE ACTUATION SYSTEMS
12
38
39647
10.21608/amme.2008.39647
EN
PATRIZIO
NUCCIO
Professor, Department of Energetics, Politecnico di Torino, Italy.
MARIO R.
MARZANO
Professor, Department of Energetics, Politecnico di Torino, Italy.
Journal Article
2019
07
08
ABSTRACT<br />The internal combustion reciprocating engines that are usually employed in automotive<br />applications need high torque at low revolution speeds to quickly increase car velocity<br />without shifting gears. However, high power at top speed is required to obtain an<br />adequate maximum speed as well as sufficient acceleration, through up-shifting.<br />Designers can decide, according to different valve-timing diagrams, whether to improve<br />torque at low speeds or power at top speeds. Unfortunately, both these improvements<br />cannot be carried out at the same time, if the valve-timing diagram does not change<br />with the engine revolution speed. Therefore, the current solutions for ordinary massproduced<br />automotive engines are often a compromise between torque and power<br />performance. A suitable choice of intake-valve and exhaust-valve timing, by means of<br />Variable Valve Actuation (VVA), could instead satisfy both these requirements at the<br />same time and even reduce fuel consumption and pollutant emissions. The aim of this<br />review is to outline some of the most significant proposals over the last forty years as far<br />as VVA systems are concerned.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
INVESTIGATION OF LOW END TORQUE DIP PROBLEM OF CAMPRO 1.6L ENGINE
39
53
39652
10.21608/amme.2008.39652
EN
MOHIUDDIN A.K.
M.
Professor, Dpt. of Mech. Engineering, International Islamic University Malaysia.
RAHMAN
A.
Asst. Prof., Dpt. of Mech. Engineering, International Islamic University Malaysia.
ARFAH
A.
Grad. student, Dpt. of Mech. Engineering, International Islamic University Malaysia.
FARRAEN M.
A.
Grad. student, Dpt. of Mech. Engineering, International Islamic University Malaysia.
Journal Article
2019
07
08
ABSTRACT<br />The main objective of this work is to perform an extensive study on the causes of the<br />torque dip in CAMPRO engine and subsequently to provide the best solution that will<br />improve the performance, reliability as well as production cost. CAMPRO engine is a<br />basic Double Overhead Camshaft (DOHC) which has a capacity of 1597 cc and<br />installed with a total of 16 valves developed by Malaysian car manufacturer PROTON in<br />the year 2000.The CAMPRO engine experiences performance downfall when it<br />reaches at certain rpm. The phenomenon is known as torque dip or torque loss where<br />the output torque is not smooth, consequently formed a dip in the torque curve. The dip<br />which occurs at 2500 – 3500 rpm is mainly influenced by the geometry of the designed<br />intake manifold and valve timing. Analysis is mostly confined on the intake manifold<br />geometry and the valve timing. Two possible solutions viz., dual length intake manifold<br />and variable valve timing are analyzed.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EVALUATION OF WHEELED VEHICLE MOBILITY AND PERFORMANCE PREDICTION ON DEFORMABLE SOIL
54
66
39656
10.21608/amme.2008.39656
EN
RAGHEB
H.
Egyptian Armed Forces.
HEGAZY
S.
Egyptian Armed Forces.
GIRGIS
N.
Egyptian Armed Forces.
Journal Article
2019
07
08
ABSTRACT<br />Mobility is the ability to move freely and rapidly over the terrain of interest to accomplish<br />varied combat objectives. The vehicle weight and its footprint determine the resultant<br />ground pressure that the vehicle imparts on the soil. The soil strength, coupled with the<br />ground pressure, determines vehicle cone index, VCI, which is the key for vehicle<br />mobility. This paper presented a theoretical evaluation of the vehicle mobility and<br />predicts its performance on deformable soil. For this purpose, soil field test was carried<br />out using cone penetrometer in situ to measure the strength of different soils. The<br />vehicle cone index was calculated using vehicle parameters.<br />A comparison of rating cone index with the vehicle cone index indicates whether the<br />vehicle can negotiate the given soil condition for a given number of passes.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EFFECT OF VARIABLE THERMAL CONDUCTIVITY ON HEAT TRANSFER FROM SPINES OF UNIFORM CROSS SECTIONS USING HPM
324
333
39671
10.21608/amme.2008.39671
EN
WAQAR A.
KHAN
Associate Professor, Department of Mechanical Engineering, National University of Sciences and Technology, PNS Jauhar, Karachi, Pakistan.
AMIR
SHAHZAD
Researcher Associate, Department of Mathematics, COMSATS Institute of Information Technology, Abbottabad, Pakistan.
Journal Article
2019
07
08
<strong>ABSTRACT:</strong>
Homotopy perturbation method (HPM) is employed to investigate the effects of temperature dependent thermal conductivity on the dimensionless temperature distribution along spines of arbitrary uniform cross sections (rectangular, square, elliptical and circular) in still ambient air. Thermal performance of each cross section is compared in terms of efficiency based on equal cross sectional area of the spines. It is noticed that elliptical and rectangular cross sections with smaller axis ratios have higher efficiencies and they approach to circular and square cross sections in the limiting case when their axis ratios tend to unity. The effect of Biot number on dimensionless temperature distribution and on efficiency of each cross section is also presented graphically.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EXPERIMENTAL AND NUMERICAL INVESTIGATIONS OF FORCED CONVECTION OVER AN INCLINED HEATED FLAT PLATE
334
348
39674
10.21608/amme.2008.39674
EN
FAYEK M.
A.
Faculty of Engineering, Banha University, Cairo, Egypt.
GOMAA A.
G.
Faculty of Industrial Education, Helwan University, Cairo, Egypt.
MOAWED M.
A.
Faculty of Engineering, Banha University, Cairo, Egypt.
El-HENDAL Y.
A.
Faculty of Engineering, Banha University, Cairo, Egypt.
Journal Article
2019
07
08
ABSTRACT<br />This work presents the considerations and results of thermofluid characteristics of air<br />flow over an inclined heated flat plate with particular reference to solar collector. The<br />study is motivated by the need to better understanding of heat transfer from the top<br />surface of flat-plate solar energy collectors. The effects of angle of attack, heat flux and<br />Reynolds number are experimentally and numerically investigated. The plate was fixed<br />in the test section with a special mechanism have a capability of changing the angle of<br />attack. A finite volume descretization method using body-fitted coordinates and<br />SIMPLE-based solution algorithm are applied with a segregated solver. The momentum<br />and energy equations were solved by the second order upwind scheme. The fluid flow<br />and heat transfer over the inclined flat plate are treated using k-ε RNG turbulent model.<br />The model results are validated with the experimental results at the same particular<br />conditions. The validated CFD model was extended to obtain the performance of a wide<br />range of angle of attack and flow rate. The local distributions of the velocity, pressure<br />and turbulence with different angle of attack are presented.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
SIMULATION AND OPTIMIZATION OF H2O-LIBR ABSORPTION REFRIGERATION SYSTEM OPERATED BY SOLAR ENERGY UNDER EGYPTIAN CLIMATIC CONDITIONS
349
368
39677
10.21608/amme.2008.39677
EN
FATOUH
M.
Professor, Dpt. of Mech. Power Eng., Helwan University, Cairo, Egypt.
HASSAN
M.
Lecturer, Dpt. of Mech. Power Eng., Helwan University, Cairo, Egypt.
Abdel Dayem A.
M.
Associate Professor, Dpt. of Mech. Power Eng., Helwan University, Cairo, Egypt.
Journal Article
2019
07
08
ABSTRACT<br />Among various types of clean energies, special attention has given to a solar energy<br />because it is freely available in hot regions where more than half the world's population<br />lives. Use of solar energy in vapor absorption refrigeration systems should be one<br />application which can achieve cooling/heating needs. In general, solar cooling systems<br />can be considered as combination of energy conversion and refrigeration subsystems.<br />The energy conversion subsystem transforms solar energy to power the refrigeration<br />system. In the present work, a solar cooling system for air conditioning applications is<br />simulated and optimized under Egyptian meteorological conditions. According to the<br />required comfort dry bulb air temperature, available cooling water temperature and<br />cooling coil capacity, optimal heat source mass flow rate and temperature to operate a<br />single-stage continuous absorption cycle was obtained. Then, economical optimization<br />of the solar system that can meet the required load was carried out for various types of<br />solar collectors. Results revealed that the flat-plate solar collector is the most efficient<br />collector from the economical point of view. Annual visualization of the system<br />performance was presented to investigate the system behavior under different weather<br />conditions for heating and cooling processes during the year to improve its life-cycle<br />savings. The environmental impact of using such system is considered. It is found that<br />the reduction of CO2 emission is a significant advantage of using solar energy.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
PROCESSING CONDITIONS AND HARDNESS DEVELOPMENT IN NITRIDED COMMERCIAL STEELS
115
129
39678
10.21608/amme.2008.39678
EN
MRIDHA
S.
Professor, Dept. of Manufacturing and Materials Engineering, International Islamic
University Malaysia, P. O. Box 10, 50728 Kuala Lumpur, Malaysia.
Journal Article
2019
07
08
ABSTRACT<br />The effects of pre-nitriding heat treatments and the influence of alloying e1ements on<br />the development of surface hardness have been investigated using Enl9 and En4lB<br />steels, gas-nitrided at different temperatures and nitriding potentials for 24 to 96 h. The<br />surface hardness is lower at 5700C than those nitrided at 4700 and 5200C. The<br />hardness is reduced with increasing the tempering temperature and this effect is<br />pronounced in En19 steel. The hardness profile is independent of tempering<br />temperatures on nitriding at 5200C. The profiles are shallower with increasing<br />tempering temperature in Enl9 steel when nitrided at 5700C. The prior austenitizing<br />temperatures appeared to have no influence on hardness or hardness profile of the<br />nitrided case. The build up of hardness up to a certain depth is established rapidly and<br />remains constant with nitriding time. Below that depth the initial hardness is low and it<br />increases steadily with nitriding time. The combined hardness curves after different<br />treatment times have the appearance of a hysteresis loop.<br />The results show a constant proportionality of hardness increment to square root of<br />alloy content when nitrided in 80% NH3 at low temperatures. The hardness increment<br />per percentage of alloying element is sensitive to the choice of base hardness of iron.<br />The low hardness development at 5700C is related to reduction in the volume fraction of<br />the fine CrN precipitates due to a coarsening effect and also due to precipitation of<br />coarse nitrides on lath boundaries. This arises since more chromium segregates as<br />(FeCr)3C at high temperatures and in-situ nucleation of CrN occurs at the carbides<br />(mainly at lath boundaries), giving non-hardening coarser CrN. This phenomenon was<br />found to be less effective in aluminium containing steel (En41B). Since aluminium does<br />not segregate to carbide as does chromium in En19 steel, fewer large nitride particles<br />will form and the volume fraction of fine precipitate will be comparatively high in En41B<br />steel.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EFFECT OF STRONTIUM MODIFICATION ON MACHINABILITY OF ALUMINIUM-SILICON EUTECTIC ALLOY
130
137
39680
10.21608/amme.2008.39680
EN
HAQUE M.
M.
Professor, Department of
Manufacturing and Materials Engineering, Kulliyyah of Engineering, International
Islamic University Malaysia (IIUM), Gombak, P.O. Box 10, 50728 Kuala Lumpur,
Malaysia.
KHAN A.
A.
Associate Professor, Department of
Manufacturing and Materials Engineering, Kulliyyah of Engineering, International
Islamic University Malaysia (IIUM), Gombak, P.O. Box 10, 50728 Kuala Lumpur,
Malaysia.
HAJJAJ S.
S
Graduate Student, Department of
Manufacturing and Materials Engineering, Kulliyyah of Engineering, International
Islamic University Malaysia (IIUM), Gombak, P.O. Box 10, 50728 Kuala Lumpur,
Malaysia.
Journal Article
2019
07
08
ABSTRACT<br />This work demonstrates and explains the effect of strontium modification on<br />machinability of aluminium-silicon eutectic (LM-6) type alloy. This alloy is known to have<br />many favourable features including great weight to strength ratio, high corrosion<br />resistance and excellent castability. However, LM-6 alloy has poor machinability, which<br />reduces its applications range. In this study, various samples of LM-6 alloy were cast<br />using sand and metallic chill mould with and without strontium addition. Machining on<br />each cast product, was carried out using recommended cutting parameters for Al-Si<br />alloys. Strontium modified samples have recorded a reduction in average flank wear, an<br />increase in shear plane angles and a reduction in chip thickness. The main reason for<br />this improvement is the refining effect of strontium, which reduces the size of the hard<br />silicon particles. As a result, their abrasive action on the tool face has reduced a lot.<br />Dramatic reductions in tool wear rate were also recorded only when the microstructures<br />were refined. On the other hand, when no refinement of microstructure occurs, tool<br />wear rate becomes high. The tool wear depends not only on the phases present in the<br />work material, but also on their sizes and distribution over the entire structure.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EFFECT OF TITANIUM, MOLYBDENUM AND MANGANESE ON WEAR BEHAVIOUR OF HIGH CHROMIUM CAST IRON
138
145
39681
10.21608/amme.2008.39681
EN
BOUHAMLA
K.
Iron and Steel Applied Research Unit, Annaba, Algeria.
MAOUCH
H.
Graduate student, Foundry Laboratory, Badji-Mokhtar University, Annaba,
Algeria.
HADJI
A.
Professor, Foundry Laboratory, Badji-Mokhtar University, Annaba, Algeria.
Journal Article
2019
07
08
ABSTRACT<br />High chromium cast irons are widely used in many engineering practices where wear<br />resistance is required. This paper studies the effect of titanium concentration on the<br />wear behaviour of slightly hypoeutectic high chromium white cast iron. Other<br />approach was investigated by adding other carbide forming elements such as<br />manganese and molybdenum as a combination of two and three elements. The aim<br />is mainly to see the influence of these elements on the toughness of the matrix, the<br />smoothness of the structure as well as the wear properties of this kind of cast iron.<br />Results, discussed in terms of the wear behaviour, shows that lower volume loss is<br />seen for the sample having higher titanium content (3% Ti). This explains that<br />titanium proeutectic carbide is the first phase precipitation during solidification which<br />contributes to a reinforcement of the matrix. The formation of these carbides<br />consumes parts of the carbon present in the alloy so that during eutectic solidification<br />the volume of eutectic carbides diminished. The addition of manganese and<br />molybdenum gives less important results.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
ENHANCEMENT OF WEAR RESISTANCE OF DIE STEEL BY DEEP CRYOGENIC TREATMENT
146
158
39684
10.21608/amme.2008.39684
EN
DAS
D.
Senior Lecturer, Department of Metallurgy and Materials Engineering, Bengal
Engineering and Science University, Shibpur, Howrah - 711103, India.
DUTTA A.
K.
Professor, Department of Mechanical Engineering, Bengal Engineering and
Science University, Shibpur, Howrah - 711103, India.
RAY K.
K.
Professor, Department of Metallurgical and Materials Engineering, Indian
Institute of Technology, Kharagpur - 721302, India.
Journal Article
2019
07
08
ABSTRACT<br />A comparative study of the wear behavior of deep cryogenically treated vis-à-vis<br />conventionally treated AISI D2 steel has been made to critically examine the extent of<br />improvement in wear resistance of tool steels by cryotreatment. A series of experiments<br />have been done to determine dry sliding wear resistance together with examinations of<br />the worn surfaces and generated debris, characterization of the microstructures, and<br />measurement of the hardness values of the differently heat treated steels. The obtained<br />results unambiguously assist to infer that cryotreatment substantially improves wear<br />resistance of D2 steel, but the extent of improvement is a strong function of the test<br />load. These observations have been explained with appropriate identification of the<br />operative wear mechanisms at different test conditions. Microstructural<br />characterizations reveal that the improvement in hardness and wear resistance by<br />cryotreatment is due to near complete removal of soft retained austenite with<br />concurrent increase in the amount of secondary carbides and tempered martensite.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
CHANGE IN MICROSTRUCTURE AND HARDNESS OF TI-6%AL-4%V ELI ALLOY ON TEMPERING PROCESS
159
165
39688
10.21608/amme.2008.39688
EN
SYARIF
J.
Depart. of Mech.& Mat. Eng., National Univ. of Malaysia, Bangi, Malaysia.
ZULHANIF
ZULHANIF
Graduate student, Dpt. of Mech.& Mat. Eng., National Univ. of Malaysia, Bangi,
Malaysia.
ABD. SALAM M.
A.
Graduate student, Dpt. of Mech.& Mat. Eng., National Univ. of Malaysia, Bangi,
Malaysia.
SAJURI
Z.
Depart. of Mech.& Mat. Eng., National Univ. of Malaysia, Bangi, Malaysia.
Journal Article
2019
07
08
ABSTRACT<br />A Ti-6Al-4V alloy is one of important titanium alloys used for aerospace, power<br />generation, chemical and biomedical applications. The alloy is available in two grades;<br />commercial grade (0.16mass% (%)-0.2% oxygen) and extra-low interstitial (ELI) grade<br />(0.10%-0.13% oxygen). In this study, effect of tempering on microstructure and<br />hardness of the Ti-6Al-4V ELI alloy was investigated. The alloy was heat-treated at<br />temperature of 1323K for 3.6ks for solution treatment at a bcc (β) phase region. The<br />alloy is subsequently quenching into the water to promote a martensitic transformation,<br />and then tempered at temperatures from 923K-1123K for various times from 0.6ks to<br />7.2ks. Microstructure of quenched specimen is a martensitic structure, which exhibits a<br />needle-like structure. On the other hand, the microstructure of the tempered specimens<br />are hcp+bcc (α+β) dual-phase. It is observed that the β phase increases as the<br />tempering temperature increases or time prolongs. Hardness measurement shows that<br />the hardness of the tempered specimen gradually increased as the time and the<br />temperature increase. It is thought that the increase in hardness of the tempered<br />specimen is due to precipitation hardening of the β phase.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THE EFFECTS OF CENTRIPETAL AND CORIOLIS FORCES ON THE DYNAMIC RESPONSE OF A CRACKED BEAM UNDER A MOVING MASS LOAD
63
82
39690
10.21608/amme.2008.39690
EN
REİS
M.
Graduate student, Dpt. of Mechanical Engineering, Uludağ University, Bursa, Turkey.
PALA
Y.
Professor, Dpt. of Mechanical Engineering, Uludağ University, Bursa, Turkey.
Journal Article
2019
07
08
ABSTRACT<br />This study is devoted to the investigation of the effects of centripetal and Coriolis forces<br />on the forced vibration of a simply supported beam with a single crack under moving<br />mass load. As in the case of beams without a crack, it is shown that these forces must<br />be considered in the analysis. The combined effects of these forces are especially<br />important for the cracked long beams. The response of the system is obtained in terms<br />of Duhamel integral. The differential equation which involves a non-linearity on its right<br />hand side is solved via an iterative procedure. The results are exemplified for various<br />values of the variables.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
DYNAMIC RESPONSE OF AN ADHASIVE BONDED JOINT FOR COMPOSITE STRUCTURE
83
94
39692
10.21608/amme.2008.39692
EN
GHONEAM S.
M.
Department of Production Engineering and Mechanical Design, Faculty of
Engineering, Menoufiya University, Shebin El-Kom, EGYPT.
HAMADA A.
A.
Department of Production Engineering and Mechanical Design, Faculty of
Engineering, Menoufiya University, Shebin El-Kom, EGYPT.
EL-ELAMY M.
I.
Department of Production Engineering and Mechanical Design, Faculty of
Engineering, Menoufiya University, Shebin El-Kom, EGYPT.
Journal Article
2019
07
08
ABSTRACT<br />The dynamic response of boned joint for composite beam under pulse load was studied<br />theoretically and experimentally. In the theoretical part, the validity of the theoretical<br />model for evaluating natural frequencies, mode shape and dynamic response of boned<br />joint composite beams at various types of bond line configuration has been examined<br />by utilizing of the finite element technique. The finite element results indicated that the<br />deformation mechanism of the boned joint composite beam depends on mechanical<br />properties of the adhesive material. The mathematical finite element model is<br />represented by introducing unified mechanical parameters to compute efficiently the<br />Eigen-nature for composite bonded structures.<br />In the experimental part, the response of fiberglass-reinforced polyester composite<br />specimens with various types of bond line configuration and five lamina orientations<br />were measured by hammer test technique "frequency response function" (FRF).<br />The comparison between experimental and numerical model shows the efficiency of the<br />proposed mathematical model of the composite structural beam with bonded joints. The<br />results show that the changes of the dynamic response provide a proper indicator for<br />predicting the current state of adhesive bonded joint.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THE USE OF BASELINE MEASUREMENTS FOR IMPROVED DAMAGE DETECTION USING DAMAGE LOCATION VECTORS
95
104
39694
10.21608/amme.2008.39694
EN
MOSTAFA K.
F.
Graduate student, Auburn Science and Engineering Center, The University of
Akron, Akron, OH, USA.
ARAFA M.
H.
Assistant Professor, Mechanical Engineering Department, American University in
Cairo, Cairo, Egypt.
Journal Article
2019
07
08
ABSTRACT<br />Vibration-based techniques are increasingly being recognized as effective nondestructive<br />structural damage identification tools. One promising technique relies on<br />combining a finite element model (FEM) of the structure under investigation with a set<br />of experimental frequency response functions (FRFs) to construct a so-called damage<br />location vector (DLV). Emphasis in this paper is placed on investigating, both<br />theoretically and experimentally, damage detection using DLVs while attempting to<br />achieve an enhanced sensitivity through comparisons with baseline measurements of<br />an initially damaged structure. To this end, the method is first studied theoretically on a<br />space truss using simulated damage to illustrate its capability. The method is then<br />improved to handle randomly assigned initial damage that is not predicted by the FEM<br />through subtraction and normalization of the DLV with respect to baseline data. The<br />improved method is finally tested experimentally on cantilever beams provided with<br />damage of various sizes. The proposed technique is effective in identifying damage that<br />would otherwise be concealed within an initially damaged structure, and provides useful<br />insight into the location and severity of damage.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
INPUT SHAPING TECHNIQUES FOR LIQUID SLOSH SUPPRESSION
105
117
39701
10.21608/amme.2008.39701
EN
ABOEL-HASSAN
A.
Assistant Professor, Mechanical Engineering Department, American University in
Cairo, Egypt.
ARAFA
M.
Assistant Professor, Mechanical Engineering Department, American University in
Cairo, Egypt.
NASSEF
A.
Associate Professor, Mechanical Engineering Department, American University in
Cairo, Egypt.
Journal Article
2019
07
08
ABSTRACT<br />The need for fast maneuvering and accurate positioning of flexible structures<br />poses a control challenge. The inherent flexibility in these lightly damped systems<br />creates large undesirable residual vibrations in response to rapid disturbances. Several<br />control approaches have been proposed to tackle this class of problems, of which the<br />input shaping technique is appealing in many aspects.<br />While input shaping has been widely investigated to attenuate residual vibrations in<br />flexible structures, less attention was granted to expand its viability in further<br />applications. The aim of this work is to develop a methodology for applying input<br />shaping techniques to suppress sloshing effects in open moving containers to facilitate<br />safe and fast point-to-point movements. The liquid behavior is modeled using finite<br />element analysis. The input shaper parameters are optimized to find the commands<br />that would result in minimum residual vibration. Other objectives, such as improved<br />robustness, and motion constraints such as deflection limiting are also addressed in the<br />optimization scheme. Numerical results are verified on an experimental setup<br />consisting of a small motor-driven water tank undergoing rectilinear motion, while<br />measuring both the tank motion and free surface displacement of the water. The<br />results obtained suggest that input shaping is an effective method for suppressing<br />residual liquid vibrations.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
NUMERICAL INVESTIGATION OF FATIGUE LIFE ON OPTIMUM AUTOFRETTAGED PRESSURIZED THICK-WALLED CYLINDERS.
1
17
39704
10.21608/amme.2008.39704
EN
BIN AYOB
A.
Associate professor. Faculty of Mech. Engineering, Universiti Teknologi Malaysia.
ELBASHEER M.
K.
Postgraduate student, Faculty of Mech. Engineering, Universiti Teknologi Malaysia.
Journal Article
2019
07
08
ABSTRACT<br />The numerical study presents a procedure to determine the optimum autofrettage<br />pressure for a given operating pressure, so as to achieve the longest fatigue service life<br />of thick-walled cylinders. The study investigates the fatigue life of pressurized cylinders<br />under the effect of applied cyclic internal operating pressure. The cylinders had<br />previously undergone a process of optimum autofrettage to induce a minimum total<br />equivalent stress under the operating pressure. A nonlinear material property with a<br />kinematic hardening was used. Experiments were carried out to validate the numerical<br />results of residual stress where strain gages provided the strain values used to find the<br />hoop stresses present on the outer surface. There was good agreement between the<br />FE simulation and the strain measurement in obtaining residual stresses. The<br />performance of the cylinders was evaluated in terms of fatigue damage accumulation<br />for various levels of autofrettage. The results clearly indicate the importance of<br />autofrettage in increasing the fatigue life. In increasing the autofrettage level, the fatigue<br />life increases first, reaches a maximum optimum level and then decreases. In<br />conclusion, optimum autofrettage level leads to an optimum fatigue life.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THE EFFECT OF AIR LATCH ON THE AIRFLOW IN 3.5-INCH HARD DISK DRIVE
369
381
39710
10.21608/amme.2008.39710
EN
BOONYARITCHAIKIT
P.
Researcher, Industry/University Cooperative Research Center (I/UCRC) in HDD
Component, Khon Kaen University, Khon Kaen 40002, Thailand.+
Graduate student, Dpt. of Mechanical Engineering, Khon Kaen University, Khon
Kaen 40002, Thailand.+
Staff, Seagate Technology (Thailand).
TAECHAJEDCADARUNGSRI
S.
Researcher, Industry/University Cooperative Research Center (I/UCRC) in HDD
Component, Khon Kaen University, Khon Kaen 40002, Thailand.+
Assistant Professor, Dpt. of Mechanical Engineering, Khon Kaen University, Khon
Kaen 40002, Thailand.
Corresponding Author.
HORMDEE
D.
Researcher, Industry/University Cooperative Research Center (I/UCRC) in HDD
Component, Khon Kaen University, Khon Kaen 40002, Thailand.+
Assistant Professor, Dpt. of Computer Engineering, Khon Kaen University, Khon
Kaen 40002, Thailand.
Journal Article
2019
07
08
ABSTRACT<br />Nowadays, the performance of computers has improved very fast. The design<br />development of data storage devices such as Hard Disk Drive (HDD) has also<br />improved in order to gain more capacity with less access time. Therefore, the higher<br />spindle motor speed is needed. This requirement will then directly affect to the airflow<br />inside the HDD, which is one of the major factors causing the vibration on the recording<br />head whilst flying on the data track. The objective of this paper is to study on the airflow<br />in 3.5-inch with 7200-rpm motor speed, single head HDD, one of the most common<br />HDD models in the current market. Three-dimensional RNG K-epsilon Model will be<br />used in this study by comparing the airflow of two different models: the former is the<br />model with air latch and the latter is the model without air latch. The Head Gimbal<br />Assembly (HGA) position at Outside Disk (OD) position and Inside Disk (ID) position<br />are also studied. The simulation results with RNG K-epsilon Model showed that by<br />repositioning the HGA, the airflow inside the HDD is also changed. The airflow inside<br />the HDD across the arm and the HGA is significant faster when the HGA is positioned<br />at OD. Therefore, the arm and the HGA at OD position will face the vibration problem<br />higher than at the ID position. The air latch is found to reduce air velocity about 35%.<br />The conclusions of this paper would be useful for further study on flow induce vibration<br />on the HGA.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EFFECTS OF A DIRECTED CO-FLOW ON A TURBULENT METHANE JET
382
391
39712
10.21608/amme.2008.39712
EN
IMINE
B.
Faculté de Mécanique, Laboratoire de Mécanique Appliquée - U.S.T.O. B.P 1505 USTO –
Oran El Mnaouer – Algeria- Fax 00 213 41 34 21 99.
SENOUCI
M.
Faculté de Mécanique, Laboratoire de Mécanique Appliquée - U.S.T.O. B.P 1505 USTO –
Oran El Mnaouer – Algeria- Fax 00 213 41 34 21 99.
BOULENOUAR
M.
Faculté de Mécanique, Laboratoire de Mécanique Appliquée - U.S.T.O. B.P 1505 USTO –
Oran El Mnaouer – Algeria- Fax 00 213 41 34 21 99.
Journal Article
2019
07
08
ABSTRACT<br />In the present study, the effects of a directed co-flow on the process of Methane jet<br />have been investigated numerically. The directed co-flow preserves its axial symmetry<br />at the inlet and its direction varies between α=+20° and α= -20°. In addition, the k –ε<br />model is used to investigate effects of the variable density in axisymmetric turbulent jet.<br />The results obtained indicate that the directed co-flow with positive angles enhances<br />considerably the mixing.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
ON-LINE MEASUREMENTS AND ANALYSIS OF HIGH TURBULENT AND REVERSE FLOW FIELDS
392
403
39714
10.21608/amme.2008.39714
EN
Al-KAYIEM H.
H.
Associate Professor, Mech. Eng. Dept., Universiti Teknologi PETRONAS, Bandar Seri
Iskandar, 31750 Tronoh, Perak, Malaysia.
Journal Article
2019
07
08
ABSTRACT<br />As with most recent turbulence experimental researches, data are collected, stored and<br />analyzed by digital computers. In this investigation, a wind tunnel measurement and<br />analysis of flow field with high turbulence and recirculation is carried out. A sophisticated<br />electronic/computer system is designed and implemented to permit data acquisition and<br />on-line analysis either for in-situ calibration of the X-hot-wires or for measurement of high<br />turbulence quantities and re-circulating flows. The technique is called Flying Hot-Wire<br />probe system which is entirely controlled and operated by computer interfacing. The<br />present paper involves description the interfacing of the measuring instruments with a<br />PDP11-23 minicomputer. Also, it presents the digitizing technique to capture high<br />turbulence and reverse flow. The hardware and the software which permit precise<br />positioning of the measurement points in the flow field and the transfer of the flow field<br />signals are presented. The procedure allows evaluation of the velocity components and<br />the Reynolds stresses in axial and traverse directions. Validation test in still air and in<br />uniform flow are conducted. The results are compared with those obtained from stationary<br />hot-wires system. The in-situ calibration of the wires is successfully carried out with<br />resulted normalized standard deviation of 0.7. The measurements error in the mean flow<br />velocity is within 0.01% to 0.2%. The longitudinal turbulence intensity measured by the<br />present technique is 1% compared with 0.8% measured by stationary hot wire. The results<br />obtained are demonstrating that this is a successful technique for high turbulence intensity<br />measurement
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
APPLICATION OF PRESSURE SENSTIVE FOIL TECHNIQUE TO VISULAIZE SUBSONIC JET FLOW OVER A PLATE
404
415
39717
10.21608/amme.2008.39717
EN
IBRAHIM M.
K.
Lecturer, Aerospace Engineering Department, Faculty of Engineering, University of Cairo, Giza,
12613 Egypt.+
Currently Assistant Professor, Aerospace Engineering
Department, Graduate School of Engineering, Nagoya University, Nagoya
464-8603, Japan.
MORI
K.
Lecturer, Aerospace Engineering Department, Graduate School of Engineering, Nagoya University,
Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
NAKAMURA
Y.
Professor, Aerospace Engineering Department, Graduate School of Engineering, Nagoya
University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
Journal Article
2019
07
08
ABSTRACT<br />The present study proposes new technique to implement pressure sensitive coating on<br />porous anodized aluminum. The new technique is called pressure sensitive foil (PSFoil).<br />It is based on the conventional anodized aluminum pressure sensitive paint (AAPSP)<br />technique. In this technique, a very thin aluminum foil is coated with pressure<br />sensitive paint using anodization method. The resulting pressure sensitive foil (PS-Foil)<br />can be stick over any flat surface using a very thin silicon layer. The PS-Foil technique<br />shows very fast time response as conventional porous anodized aluminum and high<br />spatial resolution compared with conventional PSP binder based techniques. It can also<br />be applied to any existing model surface without the need to fabricate the model from<br />aluminum. The total thickness of the aluminum foil and silicon layer is as small as 250<br />micro-meters. The paint employed in the present research is Bathophen Ruthenium<br />Chloride (Ru(ph2-phen) or Ru(dpp) ). Commercially available inexpensive, high quality,<br />14-bit, CCD camera is used to capture the PSP images. Intensity based method and<br />"in-situ" calibration procedure are used to obtain the calibrated PSP images. The<br />proposed technique was applied to measure the pressure distribution over a flat plate<br />due to subsonic jet impingement at different impingement angles. The resulting PSP<br />images showed high spatial resolution of the pressure distribution and pressure<br />difference as low as 0.5 kPa can be measured.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MATERIAL PROPERTY MEASUREMENTS USING NDT METHODS
166
177
39718
10.21608/amme.2008.39718
EN
BALASUBRAMANIAM
K.
Center for Nondestructive Evaluation and Department of Mechanical Engineering, Indian Institute of
Technology Madras, Chennai INDIA 600036.
Journal Article
2019
07
08
ABSTRACT<br />In this paper, a summary of some of the NDT methods that can be used for the<br />evaluation of material properties such as stiffness, strength, residual stress, plastic<br />deformation, creep damage, fatigue damage, etc. will be addressed. NDT methods<br />includes ultrasonics, electromagnetics, and thermal. In some applications, the NDT<br />methods provides a direct measurement of the required property, while in others, the<br />correlation is indirect.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
PRE-MOULD PROCESSING FOR SYNTACTIC FOAMS: MODELLING, THEORY AND EXPERIMENT
178
191
39719
10.21608/amme.2008.39719
EN
ISLAM M.
M.
Discipline of Mechanical Engineering, School of Engineering, Faculty of Engineering, and Built
Environment, The University of Newcastle, Callaghan, NSW 2308, Australia.
KIM H.
S.
Discipline of Mechanical Engineering, School of Engineering, Faculty of Engineering, and Built
Environment, The University of Newcastle, Callaghan, NSW 2308, Australia.
Journal Article
2019
07
08
ABSTRACT<br />Pre-mould processing for syntactic foams made of starch and ceramic hollow<br />microspheres was studied. A statistical model to relate various parameters such as<br />volume expansion rate (VER) of initial bulk volume of microspheres (IBVMS),<br />microsphere size, microsphere volume fractions, minimum inter-microsphere distance<br />(MID), and mixing ratio of microspheres was developed for theoretical relations. The<br />statistical model consists of cubic cells which can optionally be simple cubic (SC) or<br />face centred cubic (FCC) or body centred cubic (BCC) cells. The theoretical relations<br />were verified with experimental/ numerical data for various mixtures of microspheres<br />and found to be capable of predicting effects of microsphere size and mixture ratio of<br />microsphere size groups on VER under various conditions arising from starch content<br />in binder and IBVMS.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
DETECTION OF HIDDEN CORROSION USING ULTRASONIC NONDESTRUCTIVE EVALUATION
192
199
39722
10.21608/amme.2008.39722
EN
HRAIRI
M.
Assistant professor, Dept. of Mechanical Engineering, IIUM, Kuala Lumpur, Malaysia.
KHAMIS
H.
Graduate student, Dept. of Mechanical Engineering, IIUM, Kuala Lumpur, Malaysia.
Journal Article
2019
07
08
ABSTRACT<br />Hidden corrosion detection is a serious problem in many industries and in the<br />aerospace industry in particular. Initiating on the inside or in the interface of an aircraft’s<br />skin, the corrosion must be tested from the outside surface. Ultrasonic bulk waves are<br />often used in thickness detection of plate structures by measuring the time-of-flight. An<br />experimental study of hidden corrosion detection by using ultrasonic non-destructive<br />evaluation (NDE) in the laboratory is presented. Corroded metal as well as corrosion<br />simulation samples were used as specimen for investigation. Normal beam probe was<br />used for testing and qualitative results based on the A-scan oscilloscope display<br />outputs were obtained.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EXPERIMENTAL AND NUMERICAL STUDY OF POWDER METALLURGY PERFORMANCE FOR AUTOMOTIVE APPLICATIONS
200
208
39724
10.21608/amme.2008.39724
EN
HRAIRI
M.
Assistant professor, Dept. of Mechanical Engineering, IIUM, Kuala Lumpur, Malaysia.
HUSSIN M.
A.
Graduate student, Dept. of Mechanical Engineering, IIUM, Kuala Lumpur, Malaysia.
RAVI N.M.
F
Graduate student, Dept. of Mechanical Engineering, IIUM, Kuala Lumpur, Malaysia.
Journal Article
2019
07
08
ABSTRACT<br />Powder metallurgy (P/M) processes using sintering are able to form net-shaped<br />products and have been used widely in the production of automobile parts to improve<br />productivity. In this work, an experimental and numerical study on the substitution by<br />P/M in automotive parts was carried out. Aluminium alloy A356 powder was used in the<br />experimental part while stainless steel 316L powder was the material of choice in the<br />numerical study. The A356 powder was shaped by a uniaxial press then sintered at 520<br />ºC. The density, compressive strength, and hardness of the produced part were<br />evaluated and compared to the values for the same material produced by the<br />permanent mould cast process. In the simulation component of this study, ANSYS™<br />Finite Element software was used to model an axisymmetric flanged part via the LSDYNA<br />™ module using the geological Cap material model. The effect of density<br />distribution in the part was analyzed through the plastic strain that was generated. The<br />result was compared to the experimental density map.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MODELING CRYSTALLINE STRUCTURE FOR METALS USING A THREE DIMENSIONAL SIMULATION CODE: PART I
209
217
39727
10.21608/amme.2008.39727
EN
ELSHARKAWY S.
G.
Ass. Prof., Dpt. of Basic Science Studies, AASTMT, Alexandria, Egypt.
SHEHADEH M.
F.
Ass. Prof, Dpt. of Mechanical and Marine Engineering, AASTMT, Alexandria, Egypt.
Journal Article
2019
07
08
ABSTRACT<br />The field of crystalline structure research is considered as an important field in material<br />technology for making a good decision on mechanical engineering design. This paper<br />presents a code for simulating a crystal structure of crystalline materials. This code<br />enables to avoid implications due to difficulty of analytical methods. The 3D of a<br />crystalline structure for a body-centered cube (BCC) Fe-metal lattice is simulated. The<br />physical inputs into the model are number of atoms, atomic volume, and vacancyformation<br />energy. This code simulates the deviation of atoms orientation as well as the<br />estimation of relative embedded energy at different temperature values. The new atom<br />poistions have been traced, also, the transition phase of Fe crystalline structure is<br />pointed out.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
COMPUTER SIMULATION TECHNIQUE TO REDUCE RESULTED RESIDUAL STRESSES AND DISTORTION IN HIGH STRENGTH THIN BUTT WELDED SHIP PANELS
97
110
39730
10.21608/amme.2008.39730
EN
EL-AFANDY M.
M.
Postgraduate Research Student, Naval Architecture and Marine Engineering
Department, Faculty of Engineering, University of Alexandria, Egypt.
EL-GAMMAL M.
M.
Emeritus Professor of Material Technology and Welding Engineering, Naval
Architecture and Marine Engineering Department, Faculty of Engineering, University
of Alexandria, Egypt.
RASHWAN A.
M.
Professor of Shipyard Technology, Naval Architecture and Marine Engineering
Department, Faculty of Engineering, University of Alexandria, Egypt.
Journal Article
2019
07
08
ABSTRACT<br />Welding of thin-plate ship structures often results in warping of finished fabricated<br />panels. Some manufacturers use preheating and/or pre-stressing the plates during<br />assembly or post heating after assembly as a mitigation method to reduce final product<br />distortion with variably satisfactory results. The current paper aims to study the effect of<br />tensile force application (on the plates undergoing welding) on the residual stresses<br />and distortion behaviours of butt welded thin ship panels using the finite element<br />method. The effects on the butt welded thin panel applying several components of<br />different magnitudes of tensile forces before and during welding are shown. Those<br />external forces are released after the welded joint has reached the room temperature.<br />The stretching force leads to a reduction in the longitudinal residual stresses,<br />consequently reduced the buckling deformation. All those diagnostics will demolish the<br />welded plate distortion making it close to zero.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MATERIAL FLOW IN FLEXIBLE MANUFACTURING
111
120
39731
10.21608/amme.2008.39731
EN
KOŠŤÁL
P.
Assoc. Prof., Institute of Production Systems and Applied Mechanics, Slovak
University of Technology, Rázusova 2, 917 01 Trnava, Slovak Republic.
MUDRIKOVÁ
A.
Senior lecturer, Institute of Production System and Applied Mechanics, Slovak
University of Technology, Rázusova 2, 917 01 Trnava, Slovak Republic.
VELÍŠEK
K.
Full professor, Institute of Production Systems and Applied Mechanics, Slovak
University of Technology, Rázusova 2, 917 01 Trnava, Slovak Republic.
Journal Article
2019
07
08
ABSTRACT<br />The flexible manufacturing system contains some CNC machine tools supported by<br />industrial robot for material handling. This system is designed to manufacturing a group<br />of similar workpieces. The system is characterized by its internal material and<br />information flow. The manufacturing process represents a complex dynamical process<br />included technological, manipulation and control operations.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
FEATURE RECOGNITION TECHNIQUE FOR TURNING OPERATION
121
134
39733
10.21608/amme.2008.39733
EN
EL-HAKIM M.
A.
Professor, Dpt. of Mechanical Engineering, Ain-Shams University, Cairo, Egypt.
AFIFI A.
A.
Assist. Prof., Dpt. of Mechanical Engineering, Modern Academy , Cairo, Egypt.
EL-MESALLAMY A.
S.
Egyptian Armed Forces.
Journal Article
2019
07
08
ABSTRACT<br />The paper presents a new feature recognition technique which is considered the first<br />module of an implemented computer aided process planning system [CAPP] for turning<br />parts. The developed feature recognition technique involves the reconstruction of the<br />part design features (lines, arcs), which are extracted from the CAD file in the form of<br />manufacturing features (16 external features, and 10 internal features). It includes also<br />retrieval of important data related to the created features (dimensions, tolerances and<br />roughness) to be an efficient tool in process planning. Output data are displayed to the<br />user as design features, and manufacturing features with all required data technique for<br />manufacturing. A case study is given to demonstrate, and verify the proposed<br />algorithm.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MACHINING PROCESS PLANNING THROUGH LATENT VARIABLE MODEL INVERSION
135
155
39734
10.21608/amme.2008.39734
EN
HUSSEIN W.
M.
Egyptian Armed Forces.
MAC-GREGOR J.
F.
McMaster University, Hamilton, Canada.
MANSOUR D.M.
M.
Ain shams University, Cairo, Egypt.
ELBESTAWI M.
A.
McMaster University, Hamilton, Canada.
Journal Article
2019
07
08
ABSTRACT<br />Manufacturers are always exerting significant effort to improve the quality of machined<br />parts by suitable choice of process parameters. Furthermore, there is a trend within<br />industry to improve process performance and product quality through analyzing<br />available historical data especially in chemical industry. This trend is driven by the need<br />to reduce product development time and cost. The use of latent variable modeling using<br />historical data has been proposed in the past for product design and quality<br />improvement (C.M. Jaeckle and J.F. MacGregor) [23]. This paper outlines the<br />application of such approach using Projection to Latent Structure (PLS) and its model<br />inversion to facilitate the choice of cutting parameters for a desired surface roughness<br />while maximizing the Metal Removal Rate (MRR). The approach is mainly based on<br />using historical data readily available on most of factory platform and simulated through<br />experiments conducted on three different milling machines under normal conditions<br />(sharp tool and stable cut). The model inversion approach is formulated in an<br />optimization problem using the latent space linear model with nonlinear constraint. The<br />approach output solutions were validated with the results showing that the proposed<br />technique can be used for process planning and quality improvement of machining<br />data.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MODELING AND IMPLEMENTATION OF THE EGYPTIAN RAILWAYS TRACKING AND CONTROL SYSTEM
156
170
39736
10.21608/amme.2008.39736
EN
IMAM T.
A.
Al Azhar University, Faculty of Science for Girls.
Journal Article
2019
07
08
ABSTRACT<br />Egypt Government decided to implement a new advanced Railways Tracking and Control<br />System (RTCS). The main aim is to protect the citizen’s (passengers) life, future, and business<br />through achieving quick trains-conflict detection, and resolution, short response times in the<br />event of disasters and other operational disturbances, and elimination of most or all “human<br />factors” trains accidents. TRCS can also overcome the problem of railways traffic congestion<br />which has increasingly become a major economic barrier to the flow of goods across the<br />country. A team has been dedicated for the Egyptian RTCS project where the system<br />investigation, data gathering, feasibility study, data analysis, system design phases have been<br />accomplished and the project is now in the real implementation phase. The new advanced<br />RTCS combines real-time rescheduling with an advanced train control tool. The system is<br />designed to increase railway network capacity and stability in heavily used mixed traffic<br />networks while minimizing the cost of building new railway infrastructure. The system combines<br />real-time rescheduling, train control, and a new strategy for train operations into a coordinated<br />Main Control Center (MCC) for traffic management. This approach is based on saturated use of<br />network capacity bottlenecks, which is implemented by ensuring that MCC and every train<br />always have up-to-date, conflict free schedule containing time, and speed and route<br />information. The implementation of the Egyptian RTCS shall provide the input data about the<br />railway subsystem (i.e. stations, locomotives, trains, trips…etc) that help in modeling the RTCS.<br />The objectives of the modeling are to assign the fleet of locomotives to a network of trains while<br />satisfying a variety of trips constraints and minimizing the total economic cost.<br />The research on the modeling of railways transportation include scheduling theory, graph theory,<br />mathematical programming, operational theory, and some have addressed the problem of traffic<br />controlling from multiple levels’ points of view. In this paper, RTCS planning is formulated as<br />Mixed Integer Programming (MIP) problem. The modeling network is a weekly space-time<br />network where arcs denote trains, nodes denote events (arrivals and departures of trains at<br />terminals), and different locomotive types define different commodities.<br />The objectives of this paper are to present the building of Egyptian RTCS project effort and to<br />emphasis on the benefits of implementing this project as well as to present the use of integer<br />MIP techniques for modeling such an RTCS.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
ACOUSTIC AND THERMAL PROPERTIES OF POLYMERIC AND BUILDING MATERIALS
50
57
39738
10.21608/amme.2008.39738
EN
FOJTU
D.
Graduate student, Inst. of Physics and Material Engineering. Faculty of
Technology, Tomas Bata University in Zlin, Zlin, Czech Republic.
LAPCIK L.
Jr.
Professor, Inst. of Physics and Material Engineering. Faculty of Technology, Tomas
Bata University in Zlin, Zlin, Czech Republic.
Journal Article
2019
07
08
ABSTRACT<br />Discordant sound annoys, awakens, angers, distracts, frustrates and creates stresses<br />that result in physiological and psychological problems. It is invisible, yet its effects are<br />clearly evident, and it pervades every facet of life.<br />Synthetic polymers and building materials play an important role in construction of<br />buildings mainly as a surface furnishing components.<br />That is why in this paper we present results of our experiments focused on<br />characterization of the basic acoustic material performance parameters, e.g. frequency<br />dependence of the sound absorption coefficient of the articles prepared from expanded<br />poly(styrene), poly(propylene), poly(vinyl chloride), mineral wool and plasterboard.<br />Paper was focused on determination of the acoustic properties (in the frequency range<br />16 – 6400 Hz) of selected synthetic polymer materials such as expanded poly(styrene),<br />poly(propylene), poly(vinyl chloride), mineral wool and plasterboard. Values of sound<br />absorption coefficient for frequency range were measured.<br />Second part of article forms measurements of thermal properties with non-stationary<br />conditions, e.g. thermal conductivity evaluated from dependence of temperature and<br />time by mathematical model with using Gauss-Newton method.<br />Obtained results allow optimization of the wall structure construction for household and<br />building industry applications. It’s possible to prepare and produce new materials,<br />optionally combinations of existing materials, to improvement damping and vibrating<br />properties.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MEASUREMENT AND ANALYSIS OF TRAIN NOISE DETECTED ON A BUILDING FAÇADE.
58
67
39741
10.21608/amme.2008.39741
EN
QUARTIERI
J.
Engineering Faculty, University of Salerno.
GUIDA
M.
Engineering Faculty, University of Salerno.
LENZA T.L.
L.
Engineering Faculty, University of Salerno.
GUARNACCIA
C.
Engineering Faculty, University of Salerno.
D’AGOSTINO
P.
Engineering Faculty, University of Salerno.
D’ARCHI M.
V.
Engineering Faculty, University of Salerno.
MAINO
D.
SAPU s.r.l. group.
Journal Article
2019
07
08
ABSTRACT<br />Noise produced by the transit of a train is affected by many variables: wheel-rail<br />contact, engine, aerodynamic noise, random events, etc.. Some of these components,<br />such as wheel-rail contact and aerodynamic noise are strongly dependent on high<br />velocity, while other components, such as noise due to engines and auxiliary devices,<br />are relevant in a low velocity regime, especially in proximity of a railway station, in the<br />approaching and leaving phases.<br />In this paper we describe both an experimental activity regarding the measurements of<br />noise produced by low velocity trains and detected on a building façade, close to a<br />railway station at night time, and a semi-quantitative theoretical model which gives the<br />principal shapes of freight trains in various dynamical situations.<br />At this stage of the study, we focus on different types of trains and of running<br />conditions, evaluating their influence on the time history by means of comparisons<br />between software predictions and experimental measurements. The experimental<br />method chosen rely upon the simultaneous detection of the acoustic signals detected<br />by two receivers placed some 30 meters apart and linked to the channels of a class 1<br />Measuring System.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
INFLUENCE OF THE VISCOTHERMAL EFFECTS ON THE VIBROACOUSTIC BEHAVIOR OF A DOUBLE PLATES SYSTEM
68
80
39745
10.21608/amme.2008.39745
EN
AKROUT
A.
Graduate student, Mechanics Modelling and Production Research Unit. National School of Engineers
of Sfax, Tunisia.
KARRA
C.
Associate professor, Mechanics Modelling and Production Research Unit. National School of
Engineers of Sfax, Tunisia.
HAMMAMI
L.
Associate professor, Mechanics Modelling and Production Research Unit. National School of
Engineers of Sfax, Tunisia.
HADDAR
M.
Professor, Mechanics Modelling and Production Research Unit. National School of Engineers of
Sfax, Tunisia.
Journal Article
2019
07
08
ABSTRACT<br />In this work, a numerical modeling to study the vibro-acoustic behavior of a double plate<br />system (such as double glazing system) taking into account of viscosity and the thermal<br />conductivity of the fluid between the two plates in the acoustic equations, is presented.<br />The dynamic equations of the coupled system are established. To solve these<br />equations, a variational formulation for the fluid and the two plates is developed. The<br />discretization by the finite element method of this variational formulation gives after<br />minimization a symmetrical coupled matrix system with nonlinear aspect. An iterative<br />procedure is derived to determine the eigenmodes of the coupled system. The modal<br />approach is adopted to determine the vibro-acoustic system’s response which<br />numerical results show the importance of the viscothermal effects in the case of thin<br />fluid layers.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MEASUREMENTS OF HIGH SPEED TRAIN NOISE DETECTED AT A RELEVANT DISTANCE AND A SIMPLE NUMERICAL MODEL.
81
91
39749
10.21608/amme.2008.39749
EN
QUARTIERI
J.
Engineering Faculty, University of Salerno.
GUARNACCIA
C
Engineering Faculty, University of Salerno.
LENZA T.L.
L
Engineering Faculty, University of Salerno.
D’AGOSTINO
P.
Engineering Faculty, University of Salerno.
MAINO
D.
SAPU s.r.l. group.
Journal Article
2019
07
08
ABSTRACT<br />In this paper an experimental activity regarding the detection of noise produced by a<br />high velocity train along a “almost” straight railway, and a semi-quantitative theoretical<br />model which gives the shape of trains noise in that running conditions, are described.<br />During this investigation the comparison between software predictions and<br />experimental measurements was focused. At the present stage of our study we are<br />starting with the theoretical reproduction of the time history of the phenomenon. In a<br />previous paper we reported about the same goal referred to low velocity trains with very<br />different operating conditions. So in this work we try to underline differences and<br />similarities.<br />The experimental measurements procedure is based on the detection of the sound<br />level outside a building placed in an interesting position with respect to the rail line. It is<br />some three hundred meters far and in a position from which one can observe more<br />than three kilometres of railway. Measurements were performed by a first class<br />Measuring System.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
ACOUSTIC PROPERTIES OF SOUND ABSORPTION PANELS USING MULTI-LAYER COIR FIBERS
92
98
39751
10.21608/amme.2008.39751
EN
ZULKIFLI
R.
Senior Lecturer, Department of Mechanical & Materials Engineering, Universiti Kebangsaan Malaysia.
NOR M.J.
M.
Professor, Department of Mechanical & Materials Engineering, Universiti Kebangsaan Malaysia.
MAT TAHIR
F.
Tutor, Department of Mechanical & Materials Engineering, Universiti Kebangsaan Malaysia.
ISMAIL A.
R.
Lecturer, Department of Mechanical & Materials Engineering, Universiti Kebangsaan Malaysia.
Journal Article
2019
07
08
ABSTRACT<br />The aim of the project was to study the potential use of an innovative acoustic<br />absorption panel using natural organic fiber as an absorbing materials to reduce<br />reverberation effect in closed spaces and to improve the acoustics performance of an<br />enclosed space. This innovative acoustic absorption panel is developed and fabricated<br />using treated coir fiber as sound absorber materials. The outer layer of the panel is<br />fabricated from natural fiber/polyester composite. This innovative panel was tested at<br />acoustic lab, faculty of engineering, Universiti Kebangsaan Malaysia using ISO 354<br />(1985) standard for noise absorption coefficient and ISO 717-1 Standard for the<br />transmission lost index. Simulation study was also conducted for the absorption panel<br />using the WinFLAGTM software. For the absorption coefficient, the experiment gives<br />around 0.70-0.80 from the range 1000 Hz until 1800 Hz while the simulation gives 0.7<br />until 0.85 for the range 500 Hz until 2500 Hz. Transmission lost index gives an average<br />of 20 dB for the panel.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
NUMERICAL SIMULATION OF AN IN-LINE TUBE BUNDLE USING THE URANS APPROACH
416
430
39755
10.21608/amme.2008.39755
EN
AMMOUR
D.
Faculty of Mechanical Engineering, Department of Marine Engineering University of
Science and Technology U.S.T.ORAN-MB, B.P.1505 Oran El Mnaouar 31000,
Oran, ALGERIA.
ADJLOUT
L.
Faculty of Mechanical Engineering, Department of Marine Engineering University of
Science and Technology U.S.T.ORAN-MB, B.P.1505 Oran El Mnaouar 31000,
Oran, ALGERIA.
ADDAD
Y.
School of MACE, Manchester University, M60 1QD, Manchester, UK.
REVELL
A.
School of MACE, Manchester University, M60 1QD, Manchester, UK.
Journal Article
2019
07
08
ABSTRACT<br />In the present work, a turbulent flow across a square in-line tube bundle is computed<br />using the Unsteady Reynolds Averaged Navier-Stokes (URANS) approach. The pitch<br />ratio used in the tube bundle configuration is P/D=T/D=1.44 and the Reynolds number<br />is 70000 based on tube diameter. Both 2D and 3D computational domains are<br />considered. Turbulence models tested include the standard k–ε model of Jones et al.<br />[12], the k-ω Shear Stress Transport (SST) model of Menter [10] and the Reynolds<br />Stress Model of Speziale et al. [11] (SSG). In addition, the recently developed, SST- as C<br />model by Revell [1] is also tested. The unstructured industrial code Code-Saturne has<br />been used for the present study. In general, the flow predictions using the 2D grid fail to<br />capture correctly the general flow physics; while on the other hand, the 3D calculations<br />give predictions of pressure fields and velocity profiles that are in broad agreement with<br />both LES results [2] and the more recent experimental data [4]. With regards to<br />turbulence models, a comparison of the pressure coefficient and velocity profiles<br />revealed that the SST- as C and RSM models, both seem to give reasonable predictions<br />of the flow, capturing the asymmetric behaviour of the flow as the reference data. As<br />expected, the standard κ – ε model fails to capture this behaviour and predicts a rather<br />symmetric flow field. The pressure spectra from the SST- as C calculation indicates a<br />single clear peak at around the frequency 45Hz (St=0.84), similar to that observed in<br />LES predictions. This suggests that both large and small re-circulations coexist on the<br />wake of centre tubes resulting in the shear stress to be higher in the bottom than on the<br />top of the tubes.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
LEAK DETECTION AND LOCALIZATION OF THE PIPELINE SYSTEMS
431
448
39757
10.21608/amme.2008.39757
EN
FOUAD M.
M.
Lecturer, Industrial Engineering Department, Faculty of Engineering, Zagazig University.
Al-AWADI
H.
Lecturer, Industrial Engineering Department, Faculty of Engineering, Zagazig University.
MOUSTAFA K.A.
F.
Professor Industrial Engineering Department, Faculty of Engineering, Zagazig University.
NAWARA G.
M.
Professor and chief Industrial Engineering Department, Faculty of Engineering, Zagazig University.
Journal Article
2019
07
08
ABSTRACT<br />Leaks of pipeline contribute to the environmental pollution, promote corrosion and<br />equipment failures and produce instabilities in the pipeline operation and control. The<br />paper purpose is to develop a mathematical model that accounts for the behavior of<br />pressure and flow-rate profiles in a pipeline systems and also involves simulation of<br />pipeline conditions using advanced models which describe the fluid behavior in pipeline<br />systems. The resulting advanced nonlinear mathematical model provides precise<br />information on the actual flow and pressure in the whole pipeline system and describes<br />the behavior of the underlying system. The proposed leak detection and localization<br />method evaluates the mismatch between actual variables and those of healthy pipeline<br />to detect leak. The proposed method appears attractive due to its simplicity. The<br />traditional leak detection and localization methods are very expensive as they require<br />the measurement of total pipeline flow and other variables at many points and are likely<br />to produce unsatisfactory results due to ignoring the transient changes in the product<br />variables.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
COMPRESSOR PERFORMANCE ADAPTATION FOR GAS PATH ANALYSIS AND DIAGNOSTICS
449
463
39760
10.21608/amme.2008.39760
EN
SALAMAT
R.
PhD Researcher, Dept of Power and Propulsion, School of Engineering, Cranfield University,
UK, employed at Qatar Petroleum.
Journal Article
2019
07
08
ABSTRACT<br />The importance of reliable engine diagnosis cannot be over emphasized as large<br />revenues are lost due to unplanned shut downs or unnecessary scheduled<br />maintenances. An accurate simulation model must be set up in order to minimize the<br />errors in performance predictions and diagnostics analysis.<br />The objective of the proceeding works is to have a compressor performance simulation<br />model matching the actual site data by a novel method and a model that can be reliably<br />used for performance predictions and diagnostics. In the adaptation process, Scaling<br />Factors (SF) are introduced and then applied to modify the compressor maps. Linear<br />adaptation is applied to single test point while non-linear adaptation is applied to<br />multiple test points. Three site real base cases are available and have been analyzed<br />and evaluated, at 99.6%, 93.0% and 90% RPM.<br />Predictions of compressor performance are compared with the manufacturer’s fleet<br />maps. The prediction accuracy has been improved significantly after the adaptation.<br />Moreover, the proposed adaptation approach could be applied for most situations.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
SIMULATION OF A REVERSE OSMOSIS SEAWATER DESALINATION PLANT, PART 1: THEORETICAL MODELING OF A REAL PLANT AND ITS VALIDATION
464
482
39764
10.21608/amme.2008.39764
EN
SEOUDY
A.
Egyptian Armed Forces.
LOTFY A.
H.
Egyptian Armed Forces.
SALEH
I.
Egyptian Armed Forces.
Journal Article
2019
07
08
ABSTRACT<br />The present work presents a theoretical modeling of a real reverse osmosis (RO) plant<br />from the hydrodynamic point of view. Mathematical models for all elements of the plant<br />have been developed including; booster pump; hydraulic filters; axial piston pump (high<br />pressure pump); RO membranes; hydraulic accumulator; reject header, and throttling<br />valve. These models have been simulated using SIMULINK 4 in MATLAB 6.1<br />environment. The pressure fluctuations of the axial piston pump have been determined<br />theoretically with and without using hydraulic accumulator in the plant system at<br />different flowrates and at different seawater salinities. Theoretical investigations have<br />been performed to predict the dynamic characteristics of the plant axial piston pump<br />and the RO membrane performance under normal and abnormal operating conditions.<br />Experimental investigations have been introduced in part 2 of this paper to verify the<br />theoretical model. The verified simulation model has been used to present a proposed<br />operational chart for the investigated desalination plant in case of working under<br />different seawater salinities and at different temperatures.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
SIMULATION OF A REVERSE OSMOSIS SEAWATER DESALINATION PLANT, PART 2: EXPERIMENTAL MEASUREMENTS AND PREDICTION STUDY ON THE VALIDATED SIMULATION MODEL
483
505
39791
10.21608/amme.2008.39791
EN
SEOUDY
A.
Egyptian Armed Forces.
LOTFY A.
H.
Egyptian Armed Forces.
SALEH
I.
Egyptian Armed Forces.
Journal Article
2019
07
08
ABSTRACT<br />The present work introduces experimental investigations of a real reverse osmosis<br />(RO) plant. Flowrate and pressure measurements have been performed. The pump<br />pressure fluctuations at different flowrates and the permeate pressure of RO membrane<br />at different seawater salinities have been measured experimentally. The results of the<br />present experimental measurements and some of the previously published<br />experimental results of RO membrane have been compared with the corresponding<br />theoretical results of the plant theoretical model in order to validate the simulation<br />program (presented in part 1 of this paper). In the present work the validated<br />simulation model has been used to carry out prediction study to investigate the dynamic<br />characteristics of the plant axial piston pump and the RO membrane performance<br />under normal and abnormal operating conditions. The RO plant simulation model has<br />been used to present a proposed operational chart for the investigated desalination<br />plant in case of working under different feed water salinity and temperature.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
BUCKLING ANALYSIS OF CARBON NANOTUBES USING A BEAM ELEMENT BASED ON MOLECULAR MECHANICS
196
202
39792
10.21608/amme.2008.39792
EN
HU
N.
Associate professor, Dpt. of Aerospace Engineering, Tohoku University, Sendai, Japan.
NONUYA
K.
Graduate student, Dpt. of Aerospace Engineering, Tohoku University, Sendai, Japan.
FUKUNAGA
H.
Professor, Aerospace Engineering, Tohoku University, Sendai, Japan.
Journal Article
2019
07
08
ABSTRACT<br />Based on both molecular mechanics and computational structural mechanics, a threedimensional<br />(3D) equivalent beam element is developed to model a C-C covalent bond<br />on carbon nanotubes (CNTs) whereas the van der Waals forces between atoms in the<br />different walls of multi-walled CNTs are described using a rod element. The buckling<br />characteristics of CNTs are conveniently analyzed by using the traditional finite element<br />method (FEM) of a 3D beam and rod model, termed as molecular structural mechanics<br />approach (MSMA). Moreover, to model the CNTs with large length or large diameter,<br />the validity of Euler’s beam buckling theory and a shell model with proper properties<br />defined from the results of MSMA is investigated. The predicted results by this simple<br />continuum mechanics approach agree well with the reported experimental data.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
WRINKLING PREDICTION FOR MIXED-HARDENING METALS IN DEEP-DRAWING PROCESS
203
214
39794
10.21608/amme.2008.39794
EN
WIRATKASEM
K.
Graduate student, Dpt. of Mechanical Engineering, King Mongkut’s University of
Technology North Bangkok, Bangkok, Thailand.
HARNCHOOWONG
S.
Professor, Dpt. of Mechanical Engineering, King Mongkut’s University of
Technology North Bangkok, Bangkok, Thailand.
Journal Article
2019
07
08
ABSTRACT<br />Wrinkling in deep-drawing process was analyzed as the form of short-wavelength<br />shallow buckling modes based on the Donnell-Mushtari-Vlasov shell theory. The local<br />analysis considered the current deformed state of a sheet element in a doubly-curved,<br />biaxial plane stress state. The yield criterion for mixed-hardening metal used J2 yield<br />criterion for isotropic metal and Hosford’s yield criterion for anisotropic metal. The effect<br />of back stresses on wrinkling limit curves was investigated numerically.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
ANALYSIS OF LAMINATED CYLINDRICAL PRESSURE VESSELS WITH PRE-LOADS
215
241
39795
10.21608/amme.2008.39795
EN
MOHAMED E.
A.
Phd., Dpt. of Mechatronics, College of Engineering, 6 October University.
Please address all correspondence to this author at the above address or by phone
at 0127376720.
Journal Article
2019
07
08
ABSTRACT<br />A new closed form analytical solution for laminated cylindrical pressure vessels with<br />lateral pressure is presented. The solution includes nonlinear effects due to large<br />deformations based on Timoshenko approach. The solution also includes the effects of<br />pre-stress which is encountered during the filament winding of composite pressure<br />vessels. The solution allows the analysis of symmetric and asymmetric stacking<br />sequences.<br />The derivation of the governing equations and its solution is presented. Special case<br />studies for the solution are discussed. Some examples are presented for two different<br />stacking sequences; the effects of length, loading pressure, and pre-stress are studied.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
FINITE ELEMENT MODEL OF A SMART ISOTROPIC BEAM WITH DISTRIBUTED PIZOELECETRIC ACTUATORS
242
258
39797
10.21608/amme.2008.39797
EN
BENDARY I.
M.
Egyptian Armed Forces.
El-SHAFEI M.
A.
Egyptian Armed Forces.
RIAD A.
M.
Egyptian Armed Forces.
Journal Article
2019
07
08
ABSTRACT<br />In this paper, the static and dynamic loading of an intelligent beam structure with<br />distributed piezoelectric actuators has been studied. The structure substrate, made of<br />isotropic material, subjected to axial and transverse mechanical loads as well as<br />electrical load. The actuators layers are made of piezoelectric material of PZT type. The<br />one-dimensional isoperimetric Hermit cubic shape functions and the Lagrange<br />interpolation function are used to formulate the finite element model for the distributed<br />coupled electromechanical behavior. The equation of motion of the structure systems is<br />obtained by using the principle of total potential energy considering the Euler-Bernoulli<br />beam assumptions. The results of the proposed finite element model are compared to<br />the available finite element and analytical results of other investigators, good<br />agreement is generally obtained.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
ROLLING PROCESS SIMULATION USING A DEVELOPED EULERIAN FORMULATION
260
272
39800
10.21608/amme.2008.39800
EN
BAYOUMI H.
N.
Lecturer, Mechanical Design & Production Dept., Cairo University, Giza, Egypt.
Journal Article
2019
07
08
ABSTRACT<br />In this paper, an Eulerian formulation is developed from the more general Arbitrary<br />Lagrangian Eulerian (ALE) formulation and is used in rolling process simulation.<br />Starting from the basic principles of continuum mechanics, a consistent ALE<br />formulation is derived. An Eulerian formulation is then obtained by fixing the finite<br />element mesh in space. A finite element program based on the Eulerian formulation<br />has been developed. The program is used to simulate a steady state rolling process.<br />The roll pressure distribution is compared with published experimental results.<br />Comparisons reveal the effectiveness of the developed formulation.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THE EFFECT OF RIBS ON BEHAVIOR OF NATURAL GAS VEHICLE PLATFORM BACKBONE WITH STAMPING CONSIDERATION
67
78
39802
10.21608/amme.2008.39802
EN
SAHARI B.
B.
Professor, Institute of Advanced Technology, ITMA, Universiti Putra Malaysia.
ARSAD N.
M.
Graduate student, Dpt. of Mech. and Manufacturing Engineering, Universiti Putra
Malaysia.
HAMOUDA A.M.
S.
Professor, Dpt. of Mechanical Engineering, Qatar University.
WONG S.
V.
Associate Professor, Dpt. of Mech. and Manufacturing Engineering, Universiti
Putra Malaysia.
AHMAD M.
F.
Section Head, R and D, Perusahaan Otomobil Nasional Sdn Bhd (PROTON).
Journal Article
2019
07
08
ABSTRACT<br />The platform is the basic automotive body structure. It is on this platform that engine<br />and other components are attached. It is made by stamping of sheet metal. The main<br />parts are the front and rear. Backbone made of stronger material is used to strengthen<br />the platform. It is located in the central portion of the platform. For natural gas vehicle, a<br />gas tank is placed underneath the backbone. The backbone is designed for high<br />stiffness and ribs are used. The ribs may cause tearing during stamping. The objective<br />of this paper is to determine the number of ribs that give high stiffness of the backbone<br />without causing defect during stamping. Finite element is used. The backbone with 3,<br />4 and 5 ribs was investigated. It was found that backbone with 3 ribs is sufficient for no<br />failure during stamping. Backbone with 5 ribs shows through thickness crack during<br />stamping.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
STUDY ON OPTIMIZATION OF COMPOSITE CONICAL STRUCTURES FOR CRASHWORTHINESS APPLICATIONS
79
89
39804
10.21608/amme.2008.39804
EN
ALJIBORI H.S.
S.
Mechanical Engineering Dept, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur,
Malaysia.
Journal Article
2019
07
08
ABSTRACT<br />In the last decade, lightweight energy-absorption structures in airframes and automotive<br />vehicles are increasingly used to meet the crashworthiness requirements with a minimum<br />weight increase. Crashworthiness may be defined as the ability of a vehicle to protect its<br />occupants from death or serious injury in an accident of a given severity.<br />Composite materials are often used to reduce the weight of structures. In the automotive<br />industry weight reduction is important because fuel consumption is directly related to<br />vehicular weight.<br />In this paper numerical investigations into the crushing of woven roving laminated conical<br />system have been conducted. Energy absorption capability can be achieved if the<br />longitudinal properties of composite structures are being utilized. This can only be done if<br />the energy absorbing system post failure scenario would be mitigated to be tearing failure<br />mechanism. The system was designed by slipping a solid cone into composite cone. The<br />semi cone angles used were 4, 8, 12, 16 and 20 degrees. The cone height and bottom<br />diameter were kept constant for all cases as 100 mm and 76.2 mm, respectively. The<br />results demonstrated that the energy was dissipated in the form of friction at the first crush<br />stage, while the post crush stage was dominated by tearing failure mechanisms.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
EVALUATION OF CHARACTERISTICS OF TRACKED VEHICLES TORSION BARS
90
103
39805
10.21608/amme.2008.39805
EN
SALEM A.
M.
SALAHUDDIEN
T.
Egyptian Armed Forces.
Journal Article
2019
07
08
ABSTRACT<br />Suspension system of high mobility tracked vehicles is often fitted with torsion bars and<br />hydraulic shock absorbers. Characteristics of these elements have a great effect on<br />shocks and vibration resulting from drive of vehicles over irregular terrain. This study is<br />concerned with evaluation of the stiffness of torsion bar of Armored Personnel Carrier<br />M113 and how it can be affected by road configuration and vehicle speed. A complete<br />test rig equipped with a complete measuring system has been designed and<br />manufactured to measure the moment acting on torsion bar and the corresponding twist<br />angle. The measured parameters are used to evaluate vehicle suspension<br />characteristics. The frequency and amplitude of an arbitrary rigid terrain profile with<br />constant vehicle speed are introduced in the test rig by adapting the rotating speed and<br />the profile of rig driving cam. Design and simulation of the test rig were carried out by<br />the aid of ADAMS program.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
STUDY OF VEHICLE CRASHWORTHINESS APPLYING COMPOSITE MATERIALS (FRONTAL AND OFFSET IMPACT)
104
117
39808
10.21608/amme.2008.39808
EN
SHARAF EL-DIEN T.A.
Y.
Egyptian Armed Forces.
MOUSA M.
M.
Egyptian Armed Forces.
ABD EL-LATIEF M.
A.
Egyptian Armed Forces.
Journal Article
2019
07
08
ABSTRACT<br />The automotive industry is faced with an unprecedented challenge, to produce lighter<br />vehicles with less fuel consumption and pollution without sacrificing internal roominess<br />and passenger safety. Therefore , new materials other than steel are being considered .<br />This study presents the usage of composite materials instead of steel in certain parts<br />(main rail, bumper, hood, fenders, wheel housing and doors) of the vehicle to improve<br />its performance by studying of vehicle crashworthiness (frontal and offset impact). A<br />finite element model of a 1994 Chevrolet C-1500 pick-up truck was modified and used<br />for this purpose with the aid of the multi-purpose finite element code LS-DYNA . The<br />results showed that, the usage of composite materials in vehicle frame (or all parts<br />together) gives higher percentage of weight reduction and higher percentage of<br />absorbed energy , than in the case of steel .
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THE VISION OF FRACTURE TOUGHNESS ASSESSMENT OF STRUCTURAL MATERIALS FOR QUALITY CONTROL AT THE MANUFACTURING STAGE
1
13
39810
10.21608/amme.2008.39810
EN
RAY K.
K.
Professor, Department of Metallurgical and Materials Engineering, Indian Institute of
Technology, Kharagpur, India.
Journal Article
2019
07
08
ABSTRACT<br />Methods to determine fracture toughness of structural materials as documented in<br />ASTM standard E-1820 are neither appropriate for quality control of tonnage materials<br />at the stage of production due to techno-economic reasons nor are suitable for material<br />development owing to their time-consuming nature. This report aims to suggest a<br />common solution to these problems considering measurement of fracture toughness<br />(KIVM) using chevron notched bend bar specimens with either rectangular cross-section<br />(RC) or circular cross-section (CC). The theoretical background for obtaining KIVMRC<br />and KIVMCC and the corresponding normalized stress intensity factors are first discussed<br />in this report. The usefulness of this technique is next illustrated using a number of<br />examples related to the examinations of the (a) effect of inclusions on toughness<br />characteristics of microalloyed steels, (b) optimization of the volume fraction of the<br />constituent phases in dual phase steels, (c) design of heat treatment for cast rolls and<br />(d) designing small specimens for fracture toughness determination.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
THE MECHANICAL DESIGN AND CONSTRUCTION OF A TRUCK-MOUNTED SCATTEROMETER PLATFORM
23
28
39816
10.21608/amme.2008.39816
EN
HALIM
A.
Malaysian Centre for Remote Sensing, No. 13, Jalan Tun Ismail, 50480 Kuala
Lumpur. Tel : 03-26966926 Fax : 03-26973360.
MAHMOOD N.
N.
Malaysian Centre for Remote Sensing, No. 13, Jalan Tun Ismail, 50480 Kuala
Lumpur. Tel : 03-26966926 Fax : 03-26973360.
ALI
A.
Malaysian Centre for Remote Sensing, No. 13, Jalan Tun Ismail, 50480 Kuala
Lumpur. Tel : 03-26966926 Fax : 03-26973360.
JAMIL
H.
Malaysian Centre for Remote Sensing, No. 13, Jalan Tun Ismail, 50480 Kuala
Lumpur. Tel : 03-26966926 Fax : 03-26973360.
MAHMOOD K.
A.
Malaysian Centre for Remote Sensing, No. 13, Jalan Tun Ismail, 50480 Kuala
Lumpur. Tel : 03-26966926 Fax : 03-26973360.
AHMAD
Z.
Malaysian Centre for Remote Sensing, No. 13, Jalan Tun Ismail, 50480 Kuala
Lumpur. Tel : 03-26966926 Fax : 03-26973360.
IBRAHIM
N.
Malaysian Centre for Remote Sensing, No. 13, Jalan Tun Ismail, 50480 Kuala
Lumpur. Tel : 03-26966926 Fax : 03-26973360.
BREVERN P.
V.
Faculty of Engineering and Technology, Multimedia University, Jalan Ayer Keroh L
Ama, 75450 Melaka, Malaysia. Tel:+606-252 3004 Fax:+606-231 6552.
CHUAH H.
T.
Faculty of Engineering and Technology, Multimedia University, Jalan Ayer Keroh L
Ama, 75450 Melaka, Malaysia. Tel:+606-252 3004 Fax:+606-231 6552.
KOO V.
C.
Faculty of Engineering and Technology, Multimedia University, Jalan Ayer Keroh L
Ama, 75450 Melaka, Malaysia. Tel:+606-252 3004 Fax:+606-231 6552.
SING L.
K.
Faculty of Engineering and Technology, Multimedia University, Jalan Ayer Keroh L
Ama, 75450 Melaka, Malaysia. Tel:+606-252 3004 Fax:+606-231 6552.
Journal Article
2019
07
08
ABSTRACT<br />The construction of mobile microwave scatterometer involved the consideration to<br />ensure the platform and equipment selection full-filled technical requirement and safety<br />standard in Malaysia. Designing, and modification works involved engineering<br />calculations and methodology in determining and selecting a suitable hydraulic<br />telescopic boom that suit a selected platform available in the market. The platform is<br />also a delivery system for microwave remote sensing equipment and other accessories<br />to any locations in Malaysia. Total loading to be carried by the platform is about 4500 kg<br />and its overall weight must be 16,000 kg as recommended by hydraulic telescopic<br />boom manufacturers. The telescopic boom will elevate 30 kg microwave scatterometer<br />system and antenna to a maximum height of 27 m, and can also be rotated through<br />360o. An optical encoder is incorporated in the system to enable tracking or monitoring<br />angular movement of the hydraulic telescopic boom when positioned towards required<br />target. Provision is also provided for future up grading of the system.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
RELIABILITY OF MICROELECTRONIC DEVICES FROM EMITTERBASE JUNCTION CHARACTERIZATION
29
37
39820
10.21608/amme.2008.39820
EN
TAZBIT
W.
Laboratoire de physique appliquée et d’automatique LP2A,
Université de Perpignan, 52 Avenue Paul Alduy ,66860 Perpignan Cedex, France.
MIALHE
P.
Laboratoire de physique appliquée et d’automatique LP2A,
Université de Perpignan, 52 Avenue Paul Alduy ,66860 Perpignan Cedex, France.
Journal Article
2019
07
08
ABSTRACT<br />The current-voltage characteristics of microelectronic devices are used to compare<br />commercial components. A double exponential model (VDEM) introduces physical<br />parameters to characterise the junction properties of bipolar transistor.<br />The method leads to differentiate the high and low power operating modes of devices<br />and shows that values of the junction parameters can be associated with each<br />manufacture and related to quality and reliability control.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
NANO-REINFORCED COMPOSITE INTERFACES: OPPERTUNITIES AND CHALLENGES
38
48
39822
10.21608/amme.2008.39822
EN
MEGUID S.
A.
Engineering Mechanics and Design Laboratory, Department of Mechanical and Industrial
Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario M5S 3 G8,
CANADA.
Journal Article
2019
07
08
ABSTRACT<br />In the present paper, the delamination behaviour of nano-reinforced composite double<br />cantilever beam is numerically studied. Specifically, it evaluates the influence of<br />nanofillers on the reinforcement of adhesively bonded layer under mode-I fracture<br />toughness using multiscale modelling. In this novel approach, we couple coarse-grain<br />molecular dynamics with continuum mechanics. The molecular dynamics domain and<br />the finite element domain are overlapped in a handshaking subdomain, The<br />implementation of coarse-grain molecular dynamics radically reduces the size of the<br />problem. An explicit algorithm coupling the two methodologies was developed and used<br />to determine the energy release rates of cohesive cracks in adhesively bonded<br />composite joints with varying amount of nano-reinforcement in the adhesive layer. Both<br />the quality of the prediction of the multiscale model and the influence of the nanofillers<br />are evaluated and discussed.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
TRIBO BEHAVIOUR OF POLYMER NANOCOMPOSITES (MODELLING AND EXPERIMENTS)
49
59
39825
10.21608/amme.2008.39825
EN
GNANAMOORTHY
R.
Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai
600 036, India.
SRINATH
S.
Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai
600 036, India.
Journal Article
2019
07
08
ABSTRACT<br />Addition of nanosize reinforcements to polymer matrix is a recent approach to improve<br />the matrix strength and modulus and widen the application of polymers and their<br />composites for many structural applications. Polymer nanocomposites are new<br />specialty plastic compounds, which have reinforcement having at least one dimension<br />in the nanometre scale (10-9 m) in a polymer matrix. Many researchers have reported<br />the significant increase in the strength and modulus due to the addition of<br />nanoparticles. The tribo behaviour of an engineering material is another aspect that<br />needs to be understood clearly and decides the performance of many engineering<br />components such as gears, bearings etc. This paper describes the tribo behaviour of<br />polyamide base nanocomposites. The analytical model developed to predict the<br />coefficient of friction is also described.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
CURRENT ADVANCES IN WELDING TECHNOLOGY
60
72
39827
10.21608/amme.2008.39827
EN
ACHAR D.R.
G.
Head, Materials Joining Laboratory, Department of Metallurgical and Materials
Engineering, Indian Institute of Technology Madras, Chennai, India.
Journal Article
2019
07
08
ABSTRACT<br />An overview of the trends in welding science and technology is projected after taking<br />cognizance of the current state-of-art in the world over. The situation in the Indian<br />welding industries in relation to the global scenario is discussed. Several developments<br />are described relating to the latest modifications/changes in welding processes,<br />consumables and technology. Some of the novel approaches of joining advanced<br />materials are highlighted. The growing significance of basic welding research to provide<br />the much needed science base to welding technology is elucidated. Finally, what needs<br />to be done by the Indian fabrication industry to achieve competitive edge over others in<br />the region in the manufacturing sector is addressed.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
MODELLING AND COMPARISON OF DIFFERENT DESIGN SOLUTIONS AND EXPERIMENTAL RESULTS FOR DC TRANSFERRED ARC PLASMA CUTTING TORCHES
73
83
39830
10.21608/amme.2008.39830
EN
COLOMBO
V.
Full Professor, Department of Mechanical Engineering (D.I.E.M.), Alma Mater
Studiourum-Università di Bologna, Italy.
CONCETTI
A.
PhD Student, Department of Mechanical Engineering (D.I.E.M.), Alma Mater
Studiourum-Università di Bologna, Italy.
GHEDINI
E.
Researcher, Department of Mechanical Engineering (D.I.E.M.), Alma Mater
Studiourum-Università di Bologna, Italy.
DALLAVALLE
S.
Director of the technical staff, Cebora S.p.A., Cadriano di Granarolo, Italy.
VANCINI
M.
Team leader Plasma Cutting Division, Cebora S.p.A., Cadriano di Granarolo, Italy.
Journal Article
2019
07
08
ABSTRACT<br />The aim of this work is mainly to investigate by means of a 2-D FLUENT©<br />based<br />numerical model the behaviour of different types of transferred arc dual gas plasma<br />torches used for cutting of metallic materials, giving the physical reasons for the<br />industrial success of various design and process solutions appeared over the last<br />years. Flow and heat transfer equations are solved with coupled electromagnetic ones,<br />for an optically thin LTE plasma, while turbulence phenomena are taken into account by<br />means of a k-ε RNG model, including the prediction of thermal behaviour of the solid<br />components of the torch head and the efficiency of nozzle and electrode cooling<br />systems in various operating conditions including gas mixtures (O2/air, H35/N2, N2/N2).<br />Radiation is included in the calculation of heat transfer to the surfaces of the<br />components using a customized Discrete Ordinate (DO) model. Additional experimental<br />results have been obtained using a high speed camera (HSC), during pilot arcing and<br />piercing of mild and stainless steel plates of various thickness and in different operating<br />conditions. The technique has provided new insight of the PAC process and some<br />interesting phenomena have been highlighted: such as, the trajectory and velocity of<br />hafnium particles emitted from the electrode during pilot arcing and the effect of non<br />perfectly aligned consumables (shield-nozzle) on inducing destructive piercing.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
COUPLED THERMO- MECHANICAL ANALYSIS OF SHEAR LOCALIZATION IN BULK METALLIC GLASSES
84
88
39832
10.21608/amme.2008.39832
EN
EKAMBARAM
R.
Graduate student, Department of Mechanical Engineering, National University of
Singapore, Singapore.
THAMBURAJA
P.
Assistant professor, Department of Mechanical Engineering, National University of
Singapore, Singapore.
NIKABDULLAH
N.
Professor, Department of Mechanical Engineering, Universiti kembangsaan
Malaysia, Malaysia.
Journal Article
2019
07
08
ABSTRACT<br />A Coupled-thermo-mechanical, finite deformation based constitutive model to describe<br />the deformation behavior of bulk metallic glasses was recently developed by<br />Thamburaja and Ekambaram [1] and implemented in ABAQUS/Explicit (2007) finiteelement<br />program by writing a user material sub-routine. In this work, the effectiveness<br />of this temperature-displacement model, particularly while simulating the localizing<br />behavior of metallic glasses which are deformed within the super-cooled liquid region is<br />comprehensively analyzed.<br />Numerical simulations were performed using the set of constitutive equations and list of<br />material parameters from Thamburaja and Ekambaram [1] for Vitreloy-1 metallic glass.<br />Coupled-temperature-displacement simulations were performed under specified<br />deformation rates to study the shear localization phenomena for temperatures around<br />and above the glass transition temperature. These deformation rates were obtained<br />from the experimentally determined localization mapping from Lu, J. et. al. [2] for<br />Vitreloy-1. The results from our finite element simulations could distinctively delineate<br />the incidence of shear bands for strain rates well within the experimentally obtained<br />range for localization, for ambient temperatures near the glass transition region.
Military Technical College
The International Conference on Applied Mechanics and Mechanical Engineering
2636-4352
13
13th International Conference on Applied Mechanics and Mechanical Engineering.
2008
05
01
DRY SLIDING WEAR BEHAVIOR OF NANO and MICRON PARTICLES REINFORCED P/M BASED METAL MATRIX COMPOSITES
89
101
39835
10.21608/amme.2008.39835
EN
VENKATESWARAN
K.
Department of Metallurgical and Materials Engineering, Indian Institute of Technology
Madras, Chennai 600 036, India.
M. KAMARAJ
M.
Department of Metallurgical and Materials Engineering, Indian Institute of Technology
Madras, Chennai 600 036, India.
PRASAD RAO
K.
Department of Metallurgical and Materials Engineering, Indian Institute of Technology
Madras, Chennai 600 036, India.
Journal Article
2019
07
08
ABSTRACT<br />Powder Metallurgy (P/M) based Metal Matrix Composites (MMCs) has emerged as a<br />class of materials capable of advanced structural, aerospace and automotive<br />applications in recent years. In spite of various process and property advantages, they<br />have one major disadvantage namely poor wear resistance. This restricts the use of<br />these MMCs, for wear resistant applications. Use of reinforcement of ceramic hard<br />particles namely SiC and Al2O3 , to improve wear properties in MMCs are common in<br />spite of its high cost and poor compatibility with base metal matrix. Recently, interest in<br />use of intermetallic particles in MMCs for tribological applications has grown<br />significantly. The principal advantage of intermetallic composites is the metal-like<br />properties of the matrix. Also, they are attractive in tribological applications not only for<br />their intrinsic properties such as hardness, stability, wear resistance etc. but also<br />because of their compatibility with metallic matrices. Hence, the present investigation<br />aims at studying the influence of mechanically alloyed nano iron aluminide intermetallic<br />particles and micron alumina ceramic particles on the wear behavior of P/M based<br />SS316L metal matrix composites were studied using a pin-on-disk wear testing<br />machine under dry sliding condition. Both, iron aluminide and alumina were used as<br />particle reinforcement with 10 and 20 % volume in the matrix. The composites were<br />prepared by mixing and cold compacting followed by sintering SS316L at 1250°C. The<br />presence and distribution of Fe3Al and Al2O3 phases on the matrix were identified. The<br />experimental results indicated improvement in dry sliding wear properties of MMCs<br />compared to their plain alloys. It also revealed that unreinforced SS316L showed lower<br />wear resistance, while the composites with Fe3Al were found superior during longer<br />sliding conditions. Alumina reinforced SS316L based MMCs impart good wear<br />resistance only, for shorter sliding distances and the beneficial effects of Al2O3 tend to<br />decrease as the sliding distance increases. Wear tracks were characterized by SEM<br />techniques to identify the possible wear mechanisms for the composites studied.