328 中性子回折法と計算機シミュレーションによる3次元構造物の残留応力評価(非破壊検査)

概要

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Internal residual stress estimation by the finite element method (FEM) computing has been applied to many industrial materials. In this study, we confirm the validity of the residual stress computing by a comparing with an actual measurement by the neutron diffraction. The neutron diffraction method has an advantage as a non-destructive measurement. For a model of three-dimensional structure, a jacket material of a superconducting magnet of ITER central solenoid (CS) model coil was used. The jacket material was INCOLOY908 alloy. A residual stress were estimated on two kinds of samples, straight and bent jackets, in order to investigate the effect of coilling in the model coil manufacturing process. The FEM computing were performed by a code of ABAQUS/Explicit. And the neutron diffractometer for the residual stress analysis (RESA) installed at the research reactor of JAERI was used to an actual measurement. The results of the FEM showed good agreement with the neutron diffraction measurement qualitatively.
2000-06-23