Welding deformation predictions of thin-wall cylinders using a local-global method

ZHAO Haiyan; WU Junwei; LU Xiangming; JIAN Bo; LI Hongwei

doi:10.16511/j.cnki.qhdxxb.2017.22.019

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Journal of Tsinghua University(Science and Technology) ›› 2017, Vol. 57 ›› Issue (5) : 449-453. DOI: 10.16511/j.cnki.qhdxxb.2017.22.019

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Welding deformation predictions of thin-wall cylinders using a local-global method

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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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welding deformation / finite element analysis / local-global method / thin-wall cylinder

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ZHAO Haiyan, WU Junwei, LU Xiangming, JIAN Bo, LI Hongwei. Welding deformation predictions of thin-wall cylinders using a local-global method[J]. Journal of Tsinghua University(Science and Technology). 2017, 57(5): 449-453 https://doi.org/10.16511/j.cnki.qhdxxb.2017.22.019

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