Development of efficient three-dimensional welding simulation approach for residual stress estimation in different welded joints
Development of efficient three-dimensional welding simulation approach for residual stress estimation in different welded joints
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DOI：
10.1177/0309324712463866
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发表时间：
2012-11-01
影响因子：
1.6
通讯作者：
Barsoum, Zuheir
中科院分区：
文献类型：
--
作者：
Bhatti, Ayjwat A.;Barsoum, Zuheir
基于现有的焊接模拟方法在文献中找到，一种替代和简化的焊接模拟方法，称为快速转储。它是一种顺序热力学方法，它利用热分析中的移动热源和力学分析中的块倾倒方法来预测三维焊接残余应力。首先针对纵向加劲肋节点进行了研究，然后通过对接焊、T形角焊缝和多道次管法兰节点进行了验证。使用基于Java的材料性能模拟软件JMat Pro软件获得温度依赖的材料性能。材料特性通过文献中实验确定的材料特性进行了验证。预测的残余应力进行了验证，通过X射线衍射测量的纵向加强筋角焊接头。使用快速倾倒的方法，在焊趾处获得的残余应力与测量的残余应力定性良好的协议。快速倾倒的方法显示捕捉移动热源和焊接开始/停止位置的影响。此外，它已经减少了计算时间显着与估计的焊接残余应力的准确性。
Based on the available welding simulation approaches found in the literature, an alternative and simplified welding simulation approach is developed, called rapid dumping. It is a sequential thermomechanical approach, which makes use of the moving heat source in thermal analysis and the block-dumping approach in mechanical analysis for prediction of welding residual stresses in three dimensions. It is first developed for longitudinal stiffener joint and then validated by applying on a butt-welded, T-fillet, and multipass tube-flange joints. The temperature-dependent material properties were obtained using JMat Pro software, a java-based material property simulation software. The material properties were validated with experimentally determined material properties found in the literature. The predicted residual stresses were validated by X-ray diffraction measurements on the longitudinal stiffener fillet-welded joint. Using the rapid-dumping approach, the residual stresses obtained at the weld toe were in qualitatively good agreement with the measured residual stresses. The rapid-dumping approach showed to capture the effects of moving heat source and weld start/stop location. In addition, it has reduced the computational time significantly with a preserved accuracy of the estimated welding residual stresses.