Practical Measurement of Residual Stresses Using Contour Method

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  • コンター法を用いた実構造物の残留応力計測
  • コンターホウ オ モチイタ ジツ コウゾウブツ ノ ザンリュウ オウリョク ケイソク

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Abstract

<p>In this research, the contour method was applied to measure the residual stress distribution of a bead-on-plate specimen. The measured residual stress distribution was compared with those measured by neutron diffraction method and calculated by thermal elastic plastic finite element analysis. As a result, it was found that the residual stress distribution obtained by these three methods are in good agreement. In addition, the equilibrium of reaction force on cut plane was considered in the contour method to measure residual stresses in asymmetric cutting which is assumed in the measurement of real structures. The proposed method was applied to the measurement of the residual stress in the multi-pass welded joint. The measured results indicated that the proposed method can measure the residual stress distribution in multi-pass welded joint in asymmetric test specimen.</p>

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