薄肉円筒殻の周方向溶接による残留応力・変形

概要

論文の詳細を見る
To estimate the residual stresses and deformations due to circumferential welds of a pipe, this paper suggests the trapezoid inherent strain model in which stresses and deformations are obtained to apply the Green function introduced by Shirakawa. The stresses and deformations calculated from the analytical model agree well with those measured in the experimental circumferential welds. Accordingly, the parameters determining the properties of the residual stresses and deformations could be derived analytically by means of the model. The parameters made experimentally proof of much suitability, are (T_<αν>)_θ・β_θ {=(Q/cρhl)・β_θ} and β_θ(=l/√<αh>). Where Q, c and ρ are net heat input per unit weld length, specific heat and density, and a, h and l are the mean radius, thickness and length of a cylindrical shell respectively. The length l being sufficiently larger than a and h, the residual stresses and deformations are determined by the single parameter (T_<αν>)_θ・β_θ.
社団法人溶接学会の論文
1983-02-05