Fracture characteristics of 3D-printed polymer parts: role of manufacturing process M. R. Khosravani1,∗, T. Reinicke Chair of Product Development, University of Siegen, Paul-Bonatz-Str. 9-11, 57068 Siegen, Germany, ∗ mohammadreza.khosravani@uni-siegen.de Keywords: Additive manufacturing, fracture behavior, crack path Although additive manufacturing (AM) was first developed to produce prototypes, in recent years it has also utilized used for fabrication of end-use products. As a result, the mechanical strength of additively manufactured parts has gained considerable significance. AM also known as threedimensional (3D) printing has proved its capabilities in fabrication of customizable parts with complex geometries. However, a profound knowledge about the structural integrity of 3D-printed part is still required. In the current study, effects of manufacturing parameters on the mechanical strength and the fracture behavior of 3D-printed components have been investigated. To this aim, we fabricated specimens using polyethylene terephthalate glycol (PETG) and fused deposition modeling (FDM) process. Particularly, the dumbbell-shaped and single edge notched bend (SENB) specimens were fabricated and examined to determine their tensile and fracture behaviors. In this context, the notch in SENB specimens were introduced by two different techniques to investigate influence of manufacturing process on the mechanical performance of 3D-printed PETG parts. The outcomes of this study can be used for future designs of FDM 3D-printed parts with a better structural performance. 109
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