Transactions of Materials and Heat Treatment

Title：Formability prediction and experimental study on aluminum alloy tailor welded blanks based on Norton-Hoff viscoplastic theory

Authors： Wu Jie Mao Zuli Zou Fan

Unit： Hunan Institute of Technology

KeyWords： aluminum alloy tailor welded blanks formability Norton-Hoff viscoplastic theory limiting dome height forming contour path

ClassificationCode：TG386

year,vol(issue):pagenumber：2022,47(5):109-115

Abstract：

Aluminum alloy tailor welded blank is one of the important development directions for automobile lightweight technology, and its formability is a key performance index parameter. Therefore, the forming process of limiting dome height test for AA5754 aluminum alloy tailor welded blank was simulated by the finite element method based on Norton-Hoff viscoplastic theory, and the distribution conditions of strain and displacement in the aluminum alloy tailor welded blank was analyzed when the forming heights were 20 and 29 mm, respectively. Then, the formability of AA5754 aluminum alloy tailor welded blank was predicted. Furthermore, during the limiting dome height test, the equivalent strain was distributed symmetrically in an M-shape along the forming contour path, and the maximum equivalent strain appeared at the contact edge between punch and plate. The conclusion shows that the results of finite element prediction are in good agreement with the test results, and it can be obtained from the limiting dome height test that the LDH value for the aluminum alloy tailor welded blank is 29.5 mm, and the fracture position is located at the contact edge between punch and plate.

Funds：

湖南省自然科学基金面上项目（2021JJ30205）；湖南省教育厅重点项目（19A122）；湖南工学院项目（2019HY025）；湖南省科技计划项目（2021RC1008）

作者简介：伍杰（1982-），男，博士，副教授，E-mail：jhydeyouxiang@163.com

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