Numerical Simulations of Formability of Multiphase Steels

Abstract

In this paper we investigate the formability of multiphase steels. A new model based on crystal plasticity has been developed to investigate large strain phenomena in multiphase steels. The approach is based on the concept of a unit cell. The unit cell is defined as a globally small region of the sheet that contains all the essential micro‐structural and textural features that characterize the sheet. Orientations within the measured texture data are randomly assigned in the mesh/unit cell. In other words, each element of the mesh represents an orientation from the measured texture and the constitutive response at a material point is given by the single crystal constitutive model. This model is employed to construct forming limit diagrams for multiphase steels.