The effects of layers orientation on impact energy evaluation of FDM printed specimens

This paper investigates the effects of layers orientation on impact energy absorbed by acrylonitrile butadiene styrene (ABS) test specimens, obtained by additive manufacturing (AM), having three in-plane deposition directions (0°, 45°, and 90°). The specimens were tested with instrumented Charpy hammer, CEAST 9050 Pendulum Impact System, according to standard ISO179-1. Unnotched specimens were tested in edgewise direction based on measured velocity and impact force; absorbed energy was computed. The average energy obtained during impact tests for specimens with the orientation of the layers at 45° was about 0.39 J. For those with layer orientation at 0° and 90°, respectively, it was 0.63 and 0.81 J. A hinge break failure mode was observed for 0° and 90° specimens, and brittle fracture for 45° specimens.