熱弾性法による半だ円表面き裂の検出・評価

概要

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Peculiar stress-fields caused by surface flaws, as is well known, are exposed on the surface of engineering materiels under working loads. Few studies by applying thermoelastic effects whose thermograms are closely related to the isopachics on the surface have been made to estimate various surface flaws as a nondestructive testing, although the effects are generally employed to stress analysis in engineering structures. The authors have extended the thermoelastic techniques, therefore, to find nondestructively the semielliptical surface cracks with various axial ratios and inclination angles to the tensile axis, and have analyzed the isopachics over the surface using a finite element method to compare with the thermal image. As the result of the studies, it was verified that the dimensions of the surface cracks were successfully estimated through the temperature profiles of the thermograms.
一般社団法人日本機械学会の論文
1988-07-25