1 500 MPa级超高强钢复杂薄壁结构焊接变形预测

doi:10.3901/JME.2023.24.095

机械工程学报 ›› 2023, Vol. 59 ›› Issue (24): 95-107.doi: 10.3901/JME.2023.24.095

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1 500 MPa级超高强钢复杂薄壁结构焊接变形预测

梁归慧¹, 谢锋², 韩世伟², 骆文泽¹, 邓德安¹

1. 重庆大学材料科学与工程学院重庆 400045;
2. 重庆铁马工业集团有限公司重庆 400050

收稿日期:2022-09-02 修回日期:2023-03-28 出版日期:2023-12-20 发布日期:2024-03-05
通讯作者: 邓德安(通信作者),男,1968年出生,博士,教授,博士研究生导师。主要研究方向为计算焊接力学、金属材料焊接与新工艺开发等。E-mail:deandeng@cqu.edu.cn
作者简介:梁归慧,男,1998年出生,硕士研究生。主要研究方向为计算焊接力学。E-mail:62015735@qq.com
基金资助:
国家自然科学基金资助项目(51875063)

Prediction of Welding Deformation of Complex Thin Wall Structure of 1 500 MPa Grade Ultra-High Strength Steel

LIANG Guihui¹, XIE Feng², HAN Shiwei², LUO Wenze¹, DENG Dean¹

1. College of Materials Science and Engineering, Chongqing University, Chongqing 400045;
2. Chongqing Tiema Industries Group, Chongqing 400050

Received:2022-09-02 Revised:2023-03-28 Online:2023-12-20 Published:2024-03-05

摘要/Abstract

摘要： 基于MSC.Marc通用有限元软件平台，开发了同时考虑材料非线性、几何非线性和边界非线性的热-弹-塑性有限元方法用于模拟1 500 MPa级超高强钢薄板接头的焊接变形；同时也开发了基于固有应变理论的弹性有限元方法来计算大型复杂结构的焊接变形。首先，以1 500 MPa级超高强钢薄板对接接头为研究对象，分别采用热-弹-塑性有限元方法和固有应变法模拟了焊接变形，并与试验结果进行比较，计算误差均小于15%。随后，以1 500 MPa级超高强钢大型复杂薄壁结构为研究对象，采用热-弹-塑性有限元法计算薄壁结构中典型焊接接头在自由和强制拘束条件下的固有变形，考察拘束条件对焊接接头变形的影响。最后，基于固有应变理论计算了超高强钢复杂薄壁结构的整体焊接变形，并研究了强制拘束对薄壁结构焊接变形的影响。数值模拟结果表明，采用外部强制拘束可以在一定程度上减小薄壁结构的总体变形。

关键词: 焊接变形, 固有应变, 数值模拟, 外部拘束, 超高强钢, 薄板结构

Abstract: Based on the MSC. Marc software platform, a thermo-elastic-plastic finite element method considering material nonlinearity, geometric nonlinearity and boundary nonlinearity was developed to simulate welding deformation of thin-plate weldments. An elastic finite element method based on inherent strain theory was also developed to calculate welding deformation for large complex welded structures. Firstly, a 1 500 MPa ultra-high-strength steel sheet butt joint was taken as the research object, and the thermo-elastic-plastic finite element method and the inherent strain method were employed to calculate its welding deformation. The computational accuracy of these two numerical simulation methods was verified by comparing with the corresponding experimental results, and the calculation errors were both less than 15%. Then, taking a large complex thin-walled structure of 1 500 MPa grade ultra-high strength steel as the research object, the inherent deformations of typical welded joints in the thin-walled structure under free and forced constraint conditions were calculated by the thermo-elastic-plastic finite element method, and the influence of constraint conditions on the welding deformation of butt joints is investigated. Finally, the overall welding deformation of the ultra-high-strength steel complex thin-walled structure was calculated by elastic finite element method based on the inherent strain theory, and the effect of external restraint on the total welding deformation was also studied numerically. The simulation results show that the overall deformation of the thin-walled structure can be reduced to a certain extent by using external restraint.

Key words: welding deformation, inherent strain, numerical simulation, external restraint, ultra-high-strength steel, thin-plate structure

中图分类号:

TG404

梁归慧, 谢锋, 韩世伟, 骆文泽, 邓德安. 1 500 MPa级超高强钢复杂薄壁结构焊接变形预测[J]. 机械工程学报, 2023, 59(24): 95-107.

LIANG Guihui, XIE Feng, HAN Shiwei, LUO Wenze, DENG Dean. Prediction of Welding Deformation of Complex Thin Wall Structure of 1 500 MPa Grade Ultra-High Strength Steel[J]. Journal of Mechanical Engineering, 2023, 59(24): 95-107.

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1 500 MPa级超高强钢复杂薄壁结构焊接变形预测

Prediction of Welding Deformation of Complex Thin Wall Structure of 1 500 MPa Grade Ultra-High Strength Steel

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