Modelling of nonlocal damage and failure in ductile steel sheets under multiaxial loading

A continuum damage model is proposed capturing the influence of damage on the stress tensor for ductile steel sheets under multiaxial loading conditions. The model consists of a critical strain, representing damage initiation, as well as a failure strain. Both are Hosford-Coulomb type functions of the triaxiality and the Lode parameter. In order to prevent the pathological mesh-sensitivity for continuum damage models, the approach is extended...