AbstractThe overall deformation behavior of rubber‐toughened polymers (e.g. PC/ABS blends) exhibits a pronounced plastic dilatancy. As this volume increase results from diverse micromechanisms the appropriate structure of a macroscopic model is not obvious. In this contribution, different material models featuring plastic dilatancy are compared with regard to their ability to capture the deformation behavior of PC/ABS in different loading situations. All models are calibrated to match experimental data under uniaxial tension in terms of true stress‐strain curves and the evolution of volume strain. Afterwards they are employed in finite element (FE) simulations of single‐edge‐notch‐tensile (SENT) tests. Patterns of plastic deformation computed from the different material models are compared to experimental findings. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)