| MECHANICAL ENGINEERING |
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Welding deformation predictions of thin-wall cylinders using a local-global method |
| ZHAO Haiyan1, WU Junwei1, LU Xiangming2, JIAN Bo2, LI Hongwei2 |
1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
2. Beijing Institute of Specialized Machinery, Beijing 100143, China |
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Abstract Welding structure can be seriously affected by welding deformation. Accurate, efficient predictions of welding deformation are important in engineering projects. A local-global finite element analysis is used to analyze circumferential welding of large-scale thin-wall cylinders. The welding deformation of the cylinder is obtained in 3 sequences. The results show that the deformation of a 1/4 circle weld is less than for a full-circle weld and a 1/2 circle weld. The deformation of a 1/4 circle weld is about 17% less than for a full-circle weld. The local-global method results agree well with results from the thermo-elastic-plastic method and experimental data with the local-global method using about 1/6 of the time of the thermo-elastic-plastic method.
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| Keywords
welding deformation
finite element analysis
local-global method
thin-wall cylinder
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Issue Date: 15 May 2017
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2017,
Vol. 57
