Failure Modeling for QP980 Steel by a Shear Ductile Fracture Criterion

The wide application of advanced high strength steels with specific in the automotive industry can significantly reduce energy consumption and contribute to carbon neutrality. Accurate prediction ductile fracture behavior under complex stress states is great significance for its automobile industry. In this study, QP980 states, covering shear, uniaxial tension, plane strain investigated by conducting hybrid experiment simulation. pressure-coupled Drucker yield function chosen characterize effect on yielding QP980, considering accuracy compared von Mises function. Failure limit modelled five uncoupled criteria (Brozzo, Oh, Rice-Tracey, Ko-Huh, DF2012). To improve numerical accuracy, parameters constitutive model are optimized using inverse engineering approach. predicted results experimental load-stroke curves onset fracture. comparison indicates that error DF2012 criterion lower than those other four criteria. addition, greatly improved engineering.