Transactions of Materials and Heat Treatment

Title：Study on curvature analysis in square tube straightening process based on

Authors： Shi Xiang Liu Zhifang

Unit： Chongqing University of Technology

KeyWords： square tube straightening curvature integration method numerical analysis finite element analysis

ClassificationCode：TG333.2

year,vol(issue):pagenumber：2018,43(11):53-58

Abstract：

For the bending defect of square tube, based on the theory of elastic-plastic bending deformation, the history of square tube section between two adjacent straightening rollers was taken as the research interval, and the relationship model between curvature and reduction was built by the curvature integration method. Then, the mathematical model was established to describe the process of bending, elastic recovery and reverse bending in the course of straightening of the section and solved by the fsolve optimization algorithm of Matlab. At the same time, a three-dimensional contact finite element model of the square tube straightening process was established by a large-scale commercial software MSC.Marc, and the simulation was conducted. Furthermore, the square tube straightening experiment was performed. Finally, the results of numerical analysis, finite element analysis and experimental verification during the straightening process were compared and analyzed to determine the correctness and practicality of the straightening analytical model.

Funds：

重庆市教委科学技术研究项目资助（KJ1600941）

石祥（1991-），男，硕士研究生,E-mail：3046507723@qq.com;通讯作者：刘志芳(1984-)，男，博士，讲师,E-mail:liuzhifang@cqut.edu.cn

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