A New Model for Springback Prediction for Aluminum Sheet Forming

Abstract

A new model for springback, based on isotropic and kinematic hardening models, the Mroz multiple surfaces model, and observations from experimental data, is proposed in this paper. In this model, a material parameter (CM), which is significant after reverse yielding, is suggested to handle the Bauschinger effect. A simple, low-cost, multiple-bending experiment has been developed to determine CM for aluminum alloys AA6022-T4 and AA6111-T4. The new model fits available experimental results better than the isotropic and kinematic hardening models and the Mroz multiple surfaces model.