Transactions of Materials and Heat Treatment

Title：Numerical simulation research on pressure drum forming for large dual phase steel head

Authors： Dai Ao Ruan Jinhua Wang Zhigang Zhang Hongyu

Unit： Wuhan University of Science and Technology

KeyWords： large head pressure drum nonuniform plastic deformation stress strain

ClassificationCode：TG386.41

year,vol(issue):pagenumber：2022,47(10):56-62

Abstract：

Based on finite element numerical simulation, for the large dual phase steel head, the deformation laws of blank in the pressure drum forming process of head were studied by analyzing its stress, strain and velocity. The results show that the stress and strain at different points on any normal line of the middle plane of blank are different, which indicates that the shell element should not be used in this finite element model. In the early stage of pressure drum forming, the blank is mainly subjected to the pressure of upper die, so that the metal near the bottom end of upper die flows to the tail end. With the increasing of reduction amount, the tension stress of blank located at the lower die fillet corner also reaches the material yield point, and the metal near the lower die fillet corner flows into the sheet blank centre under the bending action. With the further increasing of reduction amount, more and more parts of blank and upper die are attached, and the metal velocity in this area gradually tends to zero, while the metal velocity near the fillet corner of lower die becomes larger and larger. Thus, the research results can be used to guide the manufacturing and path control of pressure drum die.

Funds：

代奥（1996-），男，硕士研究生,E-mail：a1091041840@qq.com;通信作者：王志刚（1973-），男，博士，教授,E-mail：wzhigang@wust.edu.cn

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