Transactions of Materials and Heat Treatment

Title：Theoretical prediction and numerical simulation on forming limit for tailor rolled blank

Authors： Zhang Huawei1 2 Huang Yanping2 Wu Jialu1 2

Unit： 1.Guangdong Provincial key Lab. of Petrochemical Equipment and Fault Diagnosis College of Mechanical and Electrical Engineering Guangdong University of Petrochemical Technology 2.School of Mechanical Engineering and Automation Northeastern University

KeyWords： tailor rolled blank punch bulging forming limit numerical simulation strain path

ClassificationCode：

year,vol(issue):pagenumber：2022,47(3):59-64

Abstract：

Due to the characteristic of non-uniformity for blank thickness and mechanical properties of tailor rolled blank(TRB), the accurate prediction of forming limit for TRB became a major bottleneck in the practical application process. Therefore, on the basis of geometric parameters and mechanical property parcmeters of TRB obtained in the previous study, the numerical simulation of punch bulging under different strain paths for sheet was carried out by changing the shape and dimensions of the specimen, and the forming limit curve(FLC) of TRB was obtained by data fitting method. Then, the FLC obtained by simulation and fitting was compared with the FLC obtained by theoretical formula. Finally, the obtained FLC was used to predict the forming limit of TRB box-shaped part. The results show that the FLC of TRB obtained by the numerical simulation and the fitting method is close to the theoretical curve, which can more accurately predict the forming limit of actual TRB parts.

Funds：

国家自然科学基金资助项目(51475086)；广东石油化工学院校级科研基金资助项目(2020rc020)

张华伟（1983-）男，博士，副教授 E-mail：zhanghw@neuq.edu.cn

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