Prediction of spring-back behavior in high strength low carbon steel sheets

The spring-back of polycrystalline materials has been predicted numerically using the elastic and visco-plastic crystal plasticity models. The anisotropic plane strain moduli for texture components typical in high strength steel sheets and low carbon high strength steel sheets were calculated with the upper–lower bounds and elastic self-consistent model. The yield stresses of polycrystalline materials were calculated with the visco-plastic self-consistent polycrystal model. The influence of texture components on the spring-back was analyzed in detail. The elastic and visco-plastic self-consistent models were also used to evaluate magnitude and directionality of the spring-back angle of high strength low carbon steel sheets subjected to plane strain bending.