Numerical Modelling of Sheet Metal Damage in LS-DYNA using GISSMO

In this paper, a strategy for numerical simulation of cutting during concurrent pressing of stainless steel sheet metal is investigated while accounting for the stress triaxiality and Lode angle parameter. An inverse modelling approach is used, where both a material model and a damage model are calibrated. The damage model is developed using the GISSMO damage model (Generalized Incremental Stress State dependent damage Model).