Prediction of Welding Deformation and Residual Stress Elastic FEM Based on Inherent Strain

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Other Title
  • 固有ひずみを用いた弾性計算による溶接変形および残留応力の推定
  • コユウ ヒズミ オ モチイタ ダンセイ ケイサン ニヨル ヨウセツ ヘンケイ
  • 固有ひずみを用いた弾性計算による溶接変形および残留応力の推定 : (第3報)狭開先多層溶接における変形と残留応力
  • (Third Report) Deformation and Residual Stress in Narrow Gap Welding
  • (第3報) 狭開先多層溶接における変形と残留応力

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Description

An elastic finite element method to predict the welding deformation and the residual stress in multipass narrow gap welding is proposed. The proposed method employs the inherent strain as the source of the welding deformation and the residual stress. The inherent strain in welding joint is mainly governed by the maximum heating temperature and the constraint at each material point. In addition to these, the residual stress created during the preceding welding passes is also an influential factor in case of multipass welding. Considering these three factors, the general procedure to compute the inherent strain is shown. Further, the effectiveness of the proposed method is demonstrated through an numerical example.

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