Transactions of Materials and Heat Treatment

Title：Influence of anisotropic yield function and parameter identification method on forming limit prediction

Authors： Zhu Jie Huang Shangyu Liu Wei Hu Jianhua Zou Xifan

Unit： Wuhan University of Technology

KeyWords： plane strain test anisotropic behavior yield criteria parameter identification forming limit

ClassificationCode：TG301

year,vol(issue):pagenumber：2018,43(6):151-155

Abstract：

Certain parameters should be introduced to anisotropic yield criteria to accurately predict anisotropic behavior of metal sheets, and some experiment data should be applied in the process of parameter identification. And the data of the equibiaxial tensile test is one of the data that are usually used in parameter identification. However, due to the complexity of equibiaxial tensile test and parameter inverse identification, parameter identification of anisotropic yield function was conducted by the method of plane strain test combined with standardized uniaxial tensile test. For the Yld2000-2d yield function, the parameters were identified by equibiaxial tensile test data and plane strain test data respectively, and the identified Yld2000-2d yield function was implemented in MK model to numerically predict the forming limit of aluminum alloy sheet AA5182-O and steel sheet TRIP780. By comparing with the experimental results and the prediction value obtained by Mises and Hill48 yield functions, the accuracy of Yld2000-2d yield function and the effectiveness of parameter identification by plane strain data were verified.

Funds：

国家自然科学基金资助项目（51475345）；华中科技大学材料成形与模具技术国家重点实验室开放基金（P2018-013）

朱杰（1993-），男，硕士研究生；Email：zhujie1604@edu.cn；通讯作者：刘维（1986-），男，博士，讲师；Email:weiliu@whut.edu.cn

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