多層盛溶接による熱応力・ひずみに関する熱弾塑性解析 : 累層して加熱冷却をうける帯板の熱応力およびひずみについて

概要

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This paper is concerned with the elasto-plastic analysis of thermal stresses and strains in weld metal of multi-pass butt weld. Analysis is performed based on the incremental theory of thermo-elasto-plasticity under one dimensionaly distributed temperature. Numerical calculations are made for two kinds of weld joint as shown in Figs. 1(b), (c), each of which corresponds to the behavior of the transverse and longitudinal section of weld joint respectively. Assumptions are made for heat flow that a rectangular distribution of initial temperature is given at the start of each pass and heat flow occurs only in y-direction. Another initial condition is also applied to the calculations that a line heat source is given at the start of each pass as shown in Fig. 9. From the calculations are estimated successfully transient thermal stress and plastic strain distributions. Effects of weld conditions on residual stress and strain are clarified. Relations between plastic strain in back surface and angular distortion under several weld conditions are also obtained.
社団法人溶接学会の論文
1973-10-25