1836 光音響法による傾斜凹型表面下欠陥の非破壊検出(G03-5 ニューラルネットワーク・非破壊検査,G03 材料力学)

概要

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In this study, the nondestructive testing (NDT) of tilted concave subsurface defects has been demonstrated using a photoacoustic microscope (PAM). The slit-type subsurface defects with a tilted concave-shape were fabricated in an aluminum plate specimen. The concave subsurface defect with length and depth of 6.0mm and 0.3mm was made by mechanical processing from the rear surface. The tilt angles of the slit-type defect measured from the surface (horizontal) plane θ were set to be 60, 70, 80 and 90 degrees. The obtained signal distribution was affected by the tilt angle of the subsurface defects, and, the good correlation was indicated in the relationship between the gradient ratio and tilt angle value.
一般社団法人日本機械学会の論文
2005-09-18