The Numerical Failure Prediction by the Damage Model GISSMO in Various Materials of Sheet Metal

Responding to continuous demands for weight saving and enhancement of collision safety of vehicles, high-strength steel sheets are widely used for car bodies. Also, the applications of aluminum sheets are increasing for seeking more lightweight, recently. In applying sheet metals with thinner thickness and higher strength to car bodies, numerical fracture predictions are strongly required to ensure collision safety, since the reduction of ductility becomes key issure for these materials. As a failure model, we use a well examined damage model GISSMO which includes incremental formulation for the description of material instability and localization.