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

抄録

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.