固有ひずみ法を用いた大口径ステンレス鋼配管突合せ溶接継手の残留応力測定

概要

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This study describes residual stress distribution of large-bore and heavy-walled stainless steel pipe with butt-welded joint as measured by inherent strain method with distribution function in which the inherent strain distribution is represented as function. The deviation of the most probable residual stress value obtained by the method was enough small to indicate accurate measurement. The detail feature and 3D-distribution of the residual stress generated within the heavy-walled pipe with welded joint were discussed on two variously-sized pipe joints. It was found that the residual stress distribution had more complicated shape as the bore and thickness of the pipe was larger.