Failure analysis of a cold-rolled steel tensile specimen using a damage-plasticity model

Abstract

This paper presents preliminary results on the formulation of a damage-plasticity model and its applications for the failure analysis of cold-rolled high strength steels. The model is based on von Mises plastic theory combined with a damage criterion to capture both hardening and softening responses. The proposed constitutive model is calibrated against available experimental data and implemented into the ABAQUS finite element (FE) package for the failure analysis in a tensile test of cold-formed steel (CFS). Both the experimental overall response of the member and its fracture pattern can be predicted, showing the potentials of the model in structural applications. In addition, both advantages and disadvantages of the model are discussed with proposals for further improvements.