ビードフラッシュ法の溶接配管への適用 : 軸対称問題による取り扱い

概要

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Authors have proposed a new nondestructive method of evaluating welding residual stress, the Bead Flush Method, and have confirmed its validity for simple butt-welded plates. In this method, eigen-strain distributions are estimated from strain changes due to removal of reinforcement of the weld using the inverse analysis. Then, residual stresses are estimated by the elastic FEM (Finite Element Method) analysis using estimated eigen-strain distributions as initial strains. In this study, further development of this method was attempted for application to welded pipes. Eigen-strain distributions in welded pipes are more complicated than those of welded plates from a viewpoint of residual stress estimation. A basic formulation by assuming axisymmetric condition is attempted for this problem and problems to be solved were made clear.
社団法人日本機械学会の論文
2007-01-25