Analysis and simplified model calculation of residual stress in U-rib welding of steel bridge deck

IF 2.1 4区 工程技术
Lixiong Gu, Jieming Hong, Niujing Ma
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引用次数: 0

Abstract

This article examines residual stress generation in U-ribbed steel bridge deck during welding, focusing on post-welding changes in the base material’s residual stress pattern. A thermo-elasto-plastic finite element analysis model was established to conduct numerical simulations of the welding process, summarizing the residual stress changes near the weld seam, the conclusion was drawn that the tensile and compressive forms of transverse residual stress on the upper and lower surfaces of the base plate were inconsistent. To validate the proposed numerical simulation method’s accuracy, the blind hole method was employed to measure welding-induced residual stress, and finite element analysis calculated calibration coefficients A and B, demonstrating the method’s effectiveness. Comparison of experimental measurements with numerical simulation outcomes validate the finite element simulation method’s accuracy and the adopted methodology’s feasibility. Based on these findings, a piecewise linear fitting approach was adopted to develop a simplified model of welding residual stress. The simplified model provides the initial conditions of residual stress for mechanical calculation of U-rib of the same type.
钢桥面 U 肋焊接残余应力的分析和简化模型计算
本文研究了 U 型肋钢桥面在焊接过程中产生的残余应力,重点关注焊接后母材残余应力形态的变化。文章建立了热-弹塑性有限元分析模型,对焊接过程进行了数值模拟,总结了焊缝附近的残余应力变化,得出了底板上下表面横向残余应力的拉伸和压缩形式不一致的结论。为了验证所提出的数值模拟方法的准确性,采用了盲孔法测量焊接引起的残余应力,并通过有限元分析计算出了校准系数 A 和 B,证明了该方法的有效性。实验测量结果与数值模拟结果的比较验证了有限元模拟方法的准确性和所采用方法的可行性。在此基础上,采用分片线性拟合方法建立了焊接残余应力简化模型。简化模型为同类 U 形肋的机械计算提供了残余应力的初始条件。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Advances in Mechanical Engineering
Advances in Mechanical Engineering Engineering-Mechanical Engineering
自引率
4.80%
发文量
353
期刊介绍: Advances in Mechanical Engineering (AIME) is a JCR Ranked, peer-reviewed, open access journal which publishes a wide range of original research and review articles. The journal Editorial Board welcomes manuscripts in both fundamental and applied research areas, and encourages submissions which contribute novel and innovative insights to the field of mechanical engineering
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