Experimental study on mechanical behaviour of Fused Deposition Modelling (FDM) printed parts

Zulkafle, Muhammad Zulfikri (2019) Experimental study on mechanical behaviour of Fused Deposition Modelling (FDM) printed parts. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The aimed of this study on the independent effect of each processing parameter on the mechanical properties of FDM parts. The raw material was used PLA and analyzed by using Design of Experiment and tensile testing. The objectives of this project were to investigate each processing parameter on the mechanical properties conducted using Taguchi’s design of experiments and to obtain the mechanical properties of each fabricated sample using a tensile test per ASTM D638 standards (Type IV). The method to produce ‘Dog Bone’ specimen is drawn the CAD model by using Solidworks software, then the specimen produced using UP Plus 2 Printer. The parameter of factors that contributed to this experiment was the thickness of the layer which is 0.2mm, 0.3mm or 0.4mm, an orientation which is 0°, 45° or 90°, infill which is solid, loose or hollow, and the speed which is fine, normal or fast. Tensile testing is the main technique to get the mechanical properties that were about stress and strain of the specimen. The tensile breaking pattern observed by using a microscope. The Minitab software generated the optimized parameter which was the thickness of a layer is 0.4mm, orientation is 90°, infill is loose and speed is fast. The result shows the best parameters then conducted in the confirmation test which the prediction tensile stress was 44.59MPa. After running the confirmation test according to the optimized parameter, then the result of tensile stress for the confirmation test will be compared between the prediction tensile stress. The percentage error for the confirmation test is 9.54% compared with the prediction tensile stress.

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