@misc{SagradovSchobRoszaketal., author = {Sagradov, Ilja and Schob, Daniela and Roszak, Robert and Maasch, Philipp and Sparr, Holger and Ziegenhorn, Matthias}, title = {Experimental investigation and numerical modelling of 3D printed polyamide 12 with viscoplasticity and a crack model at different strain rates}, series = {Materials Today Communications}, volume = {25}, journal = {Materials Today Communications}, issn = {2352-4928}, doi = {10.1016/j.mtcomm.2020.101542}, pages = {8}, abstract = {This contribution presents an investigation of strain rate dependent behaviour for selective laser sintered polyamide 12. Two different cases are considered: a strain rate change within tensile loading and a relaxation test incorporating a strain rate change after each holding time section. For the simulation of material behaviour the material model of Bodner-Partom and Chaboche were used. The damage behaviour was considered by the Lemaitre crack model. Thereby it was determined which numerical model is more suitable to reproduce the strain rate-dependent behaviour. Tensile and relaxation tests at constant speeds served as the basis for these investigations.}, language = {en} }