Investigation of the effect of raster angle and layer thickness on mechanical properties of fused deposition modeling (FDM) parts

Ting, Hui Yin (2017) Investigation of the effect of raster angle and layer thickness on mechanical properties of fused deposition modeling (FDM) parts. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Additive manufacturing is a fast-growing technology and widely used in worldwide. Fused Deposition Modeling (FDM) is one of the additive manufacturing technologies which is most popular and widely use for production application and prototyping. However, the quality of FDM produced parts is significantly affected by various parameters used in this process. The most significant parameters are layer thickness and raster angle. In order to ensure the quality of the product or part, it is essential to study the mechanical properties of the part the manufactured by FDM. Hence, the purpose of this project is to investigate the effect of raster angle and layer thickness on mechanical properties of the Fused Deposition Modeling (FDM) part. The objectives of this study are to conduct tensile test and flexural test for different level of raster angle and layer thickness on 3D printed test specimen, study the effect of raster angle and layer thickness on the mechanical properties of FDM test specimens as well as identify the optimum layer thickness and the raster angle parameter for the test specimen. Various layer thickness and raster angle are introduced which are 0.2mm, 0.3mm, 0.4mm and 30°/60°, 45°/-45° and 0°/90°. Test specimens with different layer thickness and raster angle are fabricated by using FolgerTech 3D printer with the STL file which created through SolidWork software. ABS and PLA material are used to manufacture the test specimen. Mechanical test is carried out to determine the mechanical properties such as tensile strength and flexural strength. ASTM D638 and ASTM D790 standard were followed to carry out tensile and flexural test, respectively. Analysis of Variance (ANOVA) is used to determine the influence of the variable FDM process parameter layer thickness and raster angle. The results revealed that the layer thickness and raster angle significantly affect the strength of the test specimen. Lastly, the optimized set of parameter are suggested to improve the quality and the strength of the printed part.

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