Study on Accurate Numerical Analysis of Welding Residual Stress and Welding Deformation Generated in Bead-On-Plate

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  • ビードオンプレート溶接で生じる残留応力・溶接変形の高精度数値解析手法に関する研究
  • ビードオン プレート ヨウセツ デ ショウジル ザンリュウ オウリョク ヨウセツ ヘンケイ ノ コウセイド スウチ カイセキ シュホウ ニ カンスル ケンキュウ

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This paper deals with precautions needed for an accurate numerical analysis of welding residual stress and deformation. By comparison of numerical results with experimental data, the precautions of the thermal-elastio-plastic FEM are investigated. The bead-on-plate welding was selected as the first object of study, because the boundary conditions does not change with the moving of heat souce. The obtained precautions are as follows : The element division is determined by the size on the welding direction of mechanical melting point and the size of inherent area calculated by the fix-bar model. The yield strength in the area of inherent strain and the coefficient of linear expansion in the vicinity of mechanical melting point are needed.

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