Factors affecting ultimate tensile strength and impact toughness of 3D printed parts using fractional factorial design

This paper aims to investigate the mechanical properties of specimens printed by 3D open-source printers. It discusses effect five factors (part orientation, layer height, extrusion width, nozzle diameter, and filament temperature) on ultimate tensile strength impact toughness 3D-printed samples. A 25–1 resolution V fractional factorial experiment was run with 16 samples a Prusa I3 MK3S in PLA. Tensile were tested using Instron 3367 Tinius Olsen 66 testers, respectively. In analyzing data, normal probability plot effects complimented ANOVA (Analysis Of Variance) revealed that, for both responses, only part orientation statistically significant at p = 0.05. Regression equations used predict as function orientation. Both response are maximized horizontal Verification experiments have been implemented validate adopted regression equations’ predictions under different circumstances, results those appear confirm model.