Introducing/reproducing of welding distortion and residual stress in analysis for elastic-plastic behaviors of steel plates under compressive loads |
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Authors: | Do-Hyun Park Mikihito Hirohata Shingo Tamagawa You-Chul Kim |
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Affiliation: | 1. Department of Civil engineering, Osaka University, Yamadaoka, Suita, 567-0871, Osaka, Japan 2. Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, 567-0047, Osaka, Japan
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Abstract: | A series of analyses was carried out to elucidate treatment of welding imperfection for simulating elastic-plastic behaviors
of steel plates under compressive loads. A thermal elastic-plastic analysis based on infinitesimal deformation theory was
carried out on a single-pass butt-welding of thin steel plates to predict welding distortion and welding residual stress.
The obtained welding distortion and welding residual stress were introduced into an elastic-plastic large deformation analysis
as initial imperfection. However, it was elucidated that welding distortion and welding residual stress could not be reproduced
precisely due to unbalanced force caused by the difference between both analysis theories. Therefore, it should be confirmed
whether the introduced welding distortion and welding residual stress were reproduced with high accuracy. Consequently, if
welding distortion and welding residual stress cannot be reproduced, the treatment such as the convergence calculation method
applied in this study should be done for precise elucidation of the elastic-plastic behavior of plates under compressive loads. |
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