TY - GEN A1 - Sagradov, Ilja A1 - Schob, Daniela A1 - Roszak, Robert A1 - Maasch, Philipp A1 - Sparr, Holger A1 - Ziegenhorn, Matthias T1 - Experimental investigation and numerical modelling of 3D printed polyamide 12 with viscoplasticity and a crack model at different strain rates T2 - Materials Today Communications N2 - 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. KW - SLS-PA12 KW - Rate-dependent Chaboche model KW - Bodner-Partom model KW - Lemaitre Y1 - 2020 UR - https://www.sciencedirect.com/science/article/abs/pii/S2352492820325538 U6 - https://doi.org/10.1016/j.mtcomm.2020.101542 SN - 2352-4928 VL - 25 ER -