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首页> 外文期刊>Journal of Materials Engineering and Performance >Influence of Material Model on Prediction Accuracy of Welding Residual Stress in an Austenitic Stainless Steel Multi-pass Butt-Welded Joint
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Influence of Material Model on Prediction Accuracy of Welding Residual Stress in an Austenitic Stainless Steel Multi-pass Butt-Welded Joint

机译：材料模型对奥氏体不锈钢多通配对焊接接头焊接残余应力预测精度的影响

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摘要

Both experimental method and numerical simulation technology were employed to investigate welding residual stress distribution in a SUS304 steel multi-pass butt-welded joint in the current study. The main objective is to clarify the influence of strain hardening model and the yield strength of weld metal on prediction accuracy of welding residual stress. In the experiment, a SUS304 steel butt-welded joint with 17 passes was fabricated, and the welding residual stresses on both the upper and bottom surfaces of the middle cross section were measured. Meanwhile, based on ABAQUS Code, an advanced computational approach considering different plastic models as well as annealing effect was developed to simulate welding residual stress. In the simulations, the perfect plastic model, the isotropic strain hardening model, the kinematic strain hardening model and the mixed isotropic-kinematic strain hardening model were employed to calculate the welding residual stress distributions in the multi-pass butt-welded joint. In all plastic models with the consideration of strain hardening, the annealing effect was also taken into account. In addition, the influence of the yield strength of weld metal on the simulation result of residual stress was also investigated numerically. The conclusions drawn by this work will be helpful in predicting welding residual stresses of austenitic stainless steel welded structures used in nuclear power plants.
机译：采用实验方法和数值模拟技术在当前研究中调查SUS304钢多通路焊接接头中的焊接残余应力分布。主要目的是阐明应变硬化模型的影响及焊接金属屈服强度对焊接残余应力的预测精度。在实验中，制造了一种带17次通过的SUS304钢对接接头，测量了中间横截面的上层和底表面上的焊接残余应力。同时，基于ABAQUS代码，开发了考虑不同塑料模型以及退火效果的先进计算方法，以模拟焊接残余应力。在模拟中，采用完美的塑料模型，各向同性菌株硬化模型，运动菌株硬化模型和混合各向同性 - 运动应变硬化模型来计算多通路焊接接头中的焊接残余应力分布。在所有塑料模型中考虑应变硬化，也考虑了退火效果。此外，还在数值上研究了焊接金属屈服强度对残余应力仿真结果的影响。这项工作得出的结论将有助于预测核电站使用的奥氏体不锈钢焊接结构的焊接残余应力。

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