Numerical Simulation of Residual Stresses and Deformations in Typical Joints of Q890q Steel

CHANG Zhijun; YAO Chaoyi; MAO Zhixu; DENG Dean

doi:10.7512/j.issn.1001-2303.2025.09.12

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Numerical Simulation of Residual Stresses and Deformations in Typical Joints of Q890q Steel
Vol. 55, Issue 9, Pages: 114-123(2025)
Received：09 October 2024，

Revised：2024-12-11，

Published：20 September 2025
DOI： 10.7512/j.issn.1001-2303.2025.09.12
稿件说明：

移动端阅览

常志军，么超逸，毛峙溆，等.Q890q钢典型接头残余应力和变形的数值模拟［J］.电焊机，2025，55（9）：114-123. DOI： 10.7512/j.issn.1001-2303.2025.09.12.

CHANG Zhijun, YAO Chaoyi, MAO Zhixu, et al.Numerical Simulation of Residual Stresses and Deformations in Typical Joints of Q890q Steel[J].Electric Welding Machine, 2025, 55(9): 114-123. DOI： 10.7512/j.issn.1001-2303.2025.09.12.

摘要

以通用有限元软件MSC. Marc为平台，采用热-弹-塑性有限元方法，对Q890q钢典型焊接接头的残余应力与变形进行数值模拟，并模拟了焊后热处理对焊接残余应力的影响。基于数值模拟结果，系统分析了静载条件下残余应力对Q890q钢平板对接接头承载能力的影响。此外，以箱型接头为研究对象，讨论了外部拘束和接头尺寸效应对Q890q钢接头残余应力和横向收缩变形量的影响。研究表明，Q890q钢平板对接接头焊缝及附近区域存在超过材料常温屈服强度的纵向拉伸残余应力，焊后热处理能够显著降低接头的残余应力。当对接接头受到平行于焊缝的静载拉伸载荷作用时，随着载荷的不断增大，纵向残余应力的峰值先略有增加后减小并稳定在单轴拉伸屈服强度的水平上，残余应力对接头的静载强度几乎没有影响。对于Q890q钢箱型对接接头而言，外部拘束会增加横向残余应力，减小横向收缩量，且拘束位置距焊缝越近，横向残余应力增加越显著，而横向收缩量也越小。

Abstract

Using the general finite element software MSC. Marc as a platform

the thermal-elastic-plastic finite element method is employed to numerically simulate the residual stress and deformation of typical Q890q steel welded joints

and the effect of post-weld heat treatment on welding residual stress is also simulated. Based on the numerical simulation results

the influence of residual stress under static load conditions on the bearing capacity of Q890q steel flat butt joints is systematically analyzed. In addition

taking box-type joints as the research object

the effects of external restraint and joint size on the residual stress and transverse shrinkage deformation of Q890q steel joints are discussed. The study shows that there are longitudinal tensile residual stresses exceeding the normal temperature yield strength of the material in the weld and nearby areas of the Q890q steel flat butt joint

and post-weld heat treatment can significantly reduce the residual stress of the joint. When the butt joint is subjected to a static tensile load parallel to the weld

with the continuous increase of the load

the peak value of the longitudinal residual stress first slightly increases

then decreases

and stabilizes at the level of uniaxial tensile yield strength

and the residual stress has almost no effect on the static strength of the joint. For Q890q steel box-type butt joints

external restraint will increase transverse residual stress and reduce transverse shrinkage. The closer the restraint position is to the weld

the more significant the increase in transverse residual stress

and the smaller the transverse shrinkage.

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Keywords

references

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