Abstract
In this work, the high cycle fatigue response of fused filament fabrication acrylonitrile butadiene styrene solid cylinder specimens under static and cyclic torsional loadings is studied. A first experimental phase was conducted varying the number of external walls between one, two and three contours and with two different infill patterns – concentric and zigzag. Monotonic torsion tests were performed with this first set of specimens to find the best configuration. The best parameter configuration was chosen for a second experimental phase where specimens were subjected to fully reversed load-controlled loading conditions (R=-1) at room temperature. Seven different stress levels were defined to construct the S-N curve of this 3D printed configuration. The microscopic images of the fractured surfaces were also depicted after monotonic and fatigue tests, aiming to study crack initiation, propagation and to characterize the features of fracture surface.
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