Abstract
Three build orientations of acrylonitrile styrene acrylate (ASA) test samples were printed with varying infill angles and tested to fracture under tensile loading. Tensile strength as a function of infill angle, build orientation, and the void fraction in the sample cross sections were investigated. Data on the correlation between infill angle and cross-sectional void fraction with tensile strength opens the possibility for tuning the 3D printed part’s strength. Injection-molded samples were also tested for comparison. Injection molded specimens exhibited more than double the elongation but had less tensile strength relative to the strongest printed sample which was printed at a 45-degree infill angle. It is concluded that the build orientation, infill angle, and void fraction in a plane perpendicular to the applied load greatly influences the strength and elongation of 3D printed ASA.
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