電気ポテンシャルCT法による三次元き裂形状測定に関する数値解析的検討

概要

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The feasibility of the proposed Electric-Potential CT Method for detecting three-dimensional cracks was studied. This method uses techniques of inverse analysis, by which observed values of electric potential distribution on the surfaces of a cracked body are computer-processed to detect cracks. Two schemes were examined. In one scheme called the Inverse Boundary-Integral-Equation Method, boundary element equations were solved for values of the electric potential and flux on the unprescribed boundaries. Cracks were identified as flux-free boundaries. In the other scheme called the Least Residual Method, boundary element analyses of the electric potential were made for various assumed crack shapes, and the results were compared with the observed values. the least residual criterion was introduced to find the most probable crack shape. Numerical simulations of crack shape identification were made for a rectangular surface crack, a rectangular internal crack and an L-shaped surface crack. The results demonstrated the versatility of the Electric-Potential CT Method.
一般社団法人日本機械学会の論文
1986-05-25