Estimation of springback of stainless steel sheet part taking influence of anisotropic property of plastic-deformation-dependent young's modulus into account

A kinematic hardening model proposed by Yoshida and Uemori (Y-U model) was applied to the prediction of springback of stainless steel sheet part. From the experiments for the determination of the material constants, an anisotropic property of change in Young’s modulus was observed; namely, the anisotropy was different at 0°, 45° and 90° from the rolling direction. The Y-U model for the stainless steel sheet was used to a calculation of a forming process of a part to examine the accuracy of the prediction of the springback by compar-ing the calculated result with the actual part formed. In order to consider the anisotropic property of change in Young’s modulus, the calculated result to the actual part formed. In order to consider the anisotropic property of the change in Young’s modulus, the calculations were performed using the different material constants at 0°, 45° and 90° from the rolling direction. With the material constants at 90° from the rolling direction, which was the direction of springback of the part, the prediction accuracy can be improved. Therefore, the consideration of the anisotropic property of the change in Young’s modulus was found to be effective for more accurate prediction of the springback of the stainless steel part.