Transactions of Materials and Heat Treatment

Title：Hydroforming for thin-walled round tube based on one-step forming finite element method

Authors： Zhou Jiakai1 Bao Yidong2

Unit： 1. Department of Automotive and Electromechanical Engineering College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics

KeyWords： thin-walled round tube hydroforming one-step forming method total strain theory

ClassificationCode：TG394

year,vol(issue):pagenumber：2021,46(12):122-127

Abstract：

For the hydroforming process of thin-walled round tube, it is necessary to establish a fast and accurate simulation method to save the time and cost in the early stage of design. Therefore, a kind of hydroforming method of thin-walled round tube was proposed based on one-step forming method. In this method, the tube blank was taken as the initial configuration, the die cavity was taken as the final configuration surface, and the hydroforming process was regarded as an approximate proportional loading process. Then, the deformation from the initial configuration to the final configuration was only studied, and the geometric relationship between the initial configuration and the final configuration was deduced to determine the constitutive relationship of tube hydroforming. Furthermore, according to the characteristics of tube forming, the DKT12 element model was selected, and the finite element equilibrium equation was established to calculate by Newton Raphson iterative method. Finally, based on the above theories, the related program was developed. And by comparing the results of calculation values from software ABAQUS and experimental values, it is verified that the proposed method had high calculation accuracy and efficiency.

Funds：

国家自然科学基金面上项目（51775273）

周佳恺（1991-），女，硕士，助教 E-mail：zhoujiakaigz@163.com 通信作者：鲍益东（1976-），男，博士，副教授 E-mail：baoyd@nuaa.edu.cn

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