抄録
Uniaxial tension and stress reversal experiments have been carried out on 430SS stainless steel clad A1100 aluminum sheet in order to investigate its large strain elasto-plasticity behavior and cyclic stress-strain response including Bauschinger effect. Subsequently, parameter identification method for Yoshida-Uemori kinematic hardening model was proposed based on the inverse analysis with which the discrepancy of stress-strain curves between experiment and numerical simulation was minimized by numerical optimization technique. The proposed method consists of two stages, where parameters for 430SS were determined in the first stage which is followed by the parameter identification of A1100 sheet. In the second stage, parameters for A1100 were determined by using the stress-strain curves for clad sheet and rule-of-mixture. It was found that the calculated stress-strain curves incorporating the set of material parameters obtained by the proposed method well demonstrated the corresponding experimental results. Additionally, the importance of decent search region of material parameters on accuracy of parameter identification was discussed.
