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For clad sheet metals, springback behavior is directly related to the elastic-plastic properties such as Young’s modulus, the yield strength, workhardening and the Bauschinger effect of each metal layer. The aim of this study is to understand the springback characteristics of the clad sheet metals in draw bending based on the accurate FE simulation corresponding to experimental data on stainless-steel clad aluminum sheets. In the discussion, the special emphasis is placed on the influence of the Bauschinger effect. For that purpose, in the simulation, two types of material models, one is the classical isotropic hardening model (no Bauschinger effect included) and the other Yoshida-Uemori kinematic hardening model which describes the Bauschinger effect of materials properly, were used and these numerical results were compared.

Bauschinger Effect on Springback of Clad Sheet Metals in Draw Bending