電気ポテンシャルCT法による鋼板中に存在する三次元表面き裂の定量測定

概要

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The electric potential CT method proposed by the three of the present authors was applied to the quantitative measurement of three-dimensional surface cracks embedded in steel plates. The values of the electric potential on the back side surface or those on front and back side surfaces were computer-processed by an inverse analysis scheme to identify the location and shape of cracks. As an inverse analysis scheme, "the least residual method" was used, in which observed potential values were compared with those computed by the boundary element method for various assumed cracks. Cracks were determined efficiently by using a hierarchical analysis scheme which involved two-dimensional scanning inverse analyses and following three-dimensional inverse analyses. The location, shape and size of three types of cracks, i.e., a semi-circular crack, a semi-elliptical crack and an asymmetrical crack, were determined with good accuracies, demonstrating the usefulness of the electric potential CT method.
一般社団法人日本機械学会の論文
1988-02-25