%0 Journal Article %T SURFACE ROUGHNESS JUSTIFICATION IN ADDITIVE MANUFACTURING %J The International Conference on Applied Mechanics and Mechanical Engineering %I Military Technical College %Z 2636-4352 %A Hamoud, M. %D 2018 %\ 04/01/2018 %V 18 %N 18th International Conference on Applied Mechanics and Mechanical Engineering. %P 1-11 %! SURFACE ROUGHNESS JUSTIFICATION IN ADDITIVE MANUFACTURING %K additive manufacturing %K Surface Roughness Prediction %K Fused Deposition Modeling %K Prediction of Building Orientation %R 10.21608/amme.2018.35011 %X ABSTRACTRecently, developing Additive Manufacturing (AM) technologies have beenincreased, because its advantages toward the rapid manufacturing of physical modelfrom the CAD system. In the AM area, the designer specifies the desired surfacequality on the working drawing to be considered during the building operation. Theproduced surface depends on the building parameters. The aim of this work is todevelop new empirical models for predicting the building orientation that satisfyrequired surface roughness based on FDM m/c. In this study, a new 3D CADspecimen was proposed to decrease the number of experiments, measuring errorsand building cost. The specimen contains the surface orientation from 0o to 90o withstep 10o that was built three times at three different layer thickness (0.1, 0.3, and0.4mm). The order of the model was determined by the test of all orientations acceptat 30o and 60o that was used for model verification. Results show the three predictionmodels at certain three values of layer thicknesses. The prediction of buildingorientation has several benefits as follows; it is very useful information for thedesigner before exporting STL file, the AM users can choose the process parameterswithout extra trails, increase the opportunity of technology to shear in RapidManufacturing (RM), Rapid Tooling (RT), and in medical applications. %U https://amme.journals.ekb.eg/article_35011_b321fc16c334b8ba5ddf73aa1e4172c6.pdf