Applications of inherent strain and interface element to simulation of welding deformation in thin plate structures |
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Authors: | Hidekazu MurakawaDean Deng Ninshu MaJiangchao Wang |
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Affiliation: | a Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka Ibaraki, Osaka 567-0047, Japan b College of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba, Chongqing 400045, China |
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Abstract: | Welding-induced distortion not only reduces largely manufacturing accuracy but also decreases significantly productivity due to correction works. If welding distortion can be predicted through a simple and practical method beforehand, the predictions will be helpful for taking active as well as appropriate measures to control the dimension accuracy. Based on inherent strain theory and interface element formulation, we developed a practical prediction system to compute the accumulated distortion during the welding assembly process in the current study. Using the developed prediction method, we calculated the welding distortion in a thin plate structure with considering both the shrinkage due to heat input and the gap/misalignment generated during assembly process. Meanwhile, we investigated the influences of assembly sequence and gap correction on the final distortion. |
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Keywords: | Welding distortion Inherent strain Interface element Numerical simulation Assembly sequence |
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