FEM prediction of welding residual stresses in a SUS304 girth-welded pipe with emphasis on stress distribution near weld start/end location |
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| Affiliation: | 1. College of Materials Science and Engineering, Chongqing University, Shazheng Street 174, Shapingba, Chongqing 400045, China;2. Research Center of Computational Mechanics Inc., Togoshi NI-Bldg, 1-7-1 Togoshi, Shinagawa-ku, Tokyo 142-0041, Japan;1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;2. College of Mechatronics and Automotive Engineering, Chongqing Jiaotong University, No. 66 Xuefu Road, Nan-an, Chongqing 400074, China;3. Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan;4. Chongqing University, College of Materials Science and Engineering, No. 174, Shazhengjie, Shapingba, Chongqing 400044, China |
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| Abstract: | A finite element approach based on Quick Welder software is developed to simulate welding temperature field and welding residual stress distribution in a 3D multi-pass girth-welded pipe model. The characteristics of welding residual stress distributions in a SUS304 stainless steel pipe induced by heating with a tungsten inert gas arc welding torch are investigated numerically. Meanwhile, an emphasis is focused on examining the welding residual stress distributions in and near the weld start/end location. Moreover, the residual stresses predicted by the present computational approach are compared with the measured data; and the comparison suggests that the numerical simulation method has basically captured the feature of welding residual stress distribution near the weld start/end region. The numerical simulation results show that both the hoop and the axial residual stresses near the weld start/end region have sharp gradients and are significantly different from those in the steady range. |
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