ABSTRACT Composite materials are widely used in aeronautical, marine and automotive industries, because of their excellent mechanical properties, low density and ease of manufacture .However, composite laminates are susceptible to delaminations, which may not be visible externally, but can substantially affect the performance of the structure. Vibration testing, in particular delamination detection, in the composite structures is an active research area. D'Alembert principle is used to determine the theoretical natural frequency of laminated orthotropic composite plate. The present free vibration experimental study of simply supported square laminated plates is based on the comparison between natural frequencies of healthy and delaminated composite plates. The test square plates made of hand lay up 8 layers E-glass woven fibre and epoxy resin are used here. The present paper discusses the observations made on the measured natural frequencies of vibration testing from both the healthy and the delaminated square simply supported plates. The possibility of the delamination detection by vibration testing is also introduced. The effects of delamination area on the natural frequencies of the plate are presented. The delamination in composite laminates has considerable effect on the natural frequencies of the plate.
Sultan, R., Guirguis, S., Younes, M., & El-Soaly, E. (2012). DELAMINATION DETECTION OF COMPOSITE LAMINATES USING NATURAL FREQUENCY VIBRATION METHOD. The International Conference on Applied Mechanics and Mechanical Engineering, 15(15th International Conference on Applied Mechanics and Mechanical Engineering.), 1-11. doi: 10.21608/amme.2012.37258
MLA
R. Sultan; S. Guirguis; M. Younes; E. El-Soaly. "DELAMINATION DETECTION OF COMPOSITE LAMINATES USING NATURAL FREQUENCY VIBRATION METHOD", The International Conference on Applied Mechanics and Mechanical Engineering, 15, 15th International Conference on Applied Mechanics and Mechanical Engineering., 2012, 1-11. doi: 10.21608/amme.2012.37258
HARVARD
Sultan, R., Guirguis, S., Younes, M., El-Soaly, E. (2012). 'DELAMINATION DETECTION OF COMPOSITE LAMINATES USING NATURAL FREQUENCY VIBRATION METHOD', The International Conference on Applied Mechanics and Mechanical Engineering, 15(15th International Conference on Applied Mechanics and Mechanical Engineering.), pp. 1-11. doi: 10.21608/amme.2012.37258
VANCOUVER
Sultan, R., Guirguis, S., Younes, M., El-Soaly, E. DELAMINATION DETECTION OF COMPOSITE LAMINATES USING NATURAL FREQUENCY VIBRATION METHOD. The International Conference on Applied Mechanics and Mechanical Engineering, 2012; 15(15th International Conference on Applied Mechanics and Mechanical Engineering.): 1-11. doi: 10.21608/amme.2012.37258
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