Transactions of Materials and Heat Treatment

Title：Influence of Bauschinger effect on springback analysis accuracy for DP590 steel part

Authors： Guo Yueming1 Dong Zhichao2 Yan Wei2 Wang Gang2 Zhang Jian2

Unit： 1. Jilin University 2.FAW Tooling Die Co. Ltd.

KeyWords： Bauschinger effect DP590 high-strength steel springback stamping analysis accuracy

ClassificationCode：TG386

year,vol(issue):pagenumber：2024,49(3):40-46

Abstract：

For the problem of springback difference between finite element analysis and actual results for DP590 high-strength steel parts in the cold stamping. A medium channel part of automotive was selected as the research object, and the drawing, trimming and flanging dies were developed. Meanwhile, the constitutive model of material was established by carrying out the mechanical property tests of material, and the research was carried out by using the finite element analysis technology and optical inspection technology. The research results show that DP590 high-strength steel gradually exhibits non-linear elasticity, transient softening and work hardening stagnation phenomenon during the cyclic loading process, that is, the Bauschinger effect is more obvious. Furthermore, Bauschinger effect has a significant impact on the springback of DP590 high-strength steel part with variable plastic strain paths, and the finite element simulation technology predicts the actual springback of part accurately, which provides a simulation verification method for the formulation of springback modification scheme.

Funds：

国家重点研发计划资助项目（2020YFB2010300）；吉林省科技重大专项项目（20220301023GX）

作者简介：郭岳明（2002-），男，本科生,E-mail：1076683215@qq.com;通信作者：闫巍（1982-），男，硕士，正高级工程师,E-mail：yanwei_td@faw.com.cn

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