Abstract
This paper aims to investigate the mechanical properties of specimens printed by 3D open-source printers. It discusses the effect of five factors (part orientation, layer height, extrusion width, nozzle diameter, and filament temperature) on the ultimate tensile strength and the impact toughness of the 3D-printed samples. A 25–1 resolution V fractional factorial experiment was run with the 16 samples printed on a Prusa I3 MK3S in PLA. Tensile strength and impact toughness were tested using Instron 3367 and Tinius Olsen 66 testers, respectively. In analyzing the data, a normal probability plot of the effects complimented with ANOVA (Analysis Of Variance) revealed that, for both responses, only part orientation was statistically significant at p = 0.05. Regression equations were used to predict the ultimate tensile strength and the impact toughness as a function of the part orientation. Both the toughness response and the tensile strength response are maximized with horizontal part orientation. Verification experiments have been implemented to validate the adopted regression equations’ predictions under different circumstances, and the results of those experiments appear to confirm the model.
Highlights
Fused filament fabrication (FFF) is an additive manufacturing technique that builds parts layer by layer using the extruded thermoplastic filament at low cost [1]
This paper aims to investigate the mechanical properties of spec- imens printed by 3D open-source printers. It discusses the effect of five fac- tors on the ultimate tensile strength and the impact toughness of the 3D-printed samples
A normal proba- bility plot complimented with Analysis of Variance (ANOVA) (Analysis Of Variance) revealed that only part/print orientation was statistically significant at p = 0.05
Summary
Fused filament fabrication (FFF) is an additive manufacturing technique that builds parts layer by layer using the extruded thermoplastic filament at low cost [1]. FFF parts are widely used in many fields such as food [2], electronics [3], aerospace [4], automobile [5], etc. The filament is heated up to a semi-solid state and extruded through a heated nozzle to form a layer that is adhered to the previously deposited layers. One of the most widely used polymers for 3D printers is Polylactic acid (PLA) extracted from corn starch, cassava, and sugar. It’s generally easy to print with, odorless, readily avail- able, and affordable. It requires less energy than other materials because it has a low melting temperature [6, ?]
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