| 摘要 |
PROBLEM TO BE SOLVED: To estimate the shape and dimensions of the interface defect part of a coating member by obtaining the surface temperature distribution of a coating member and setting either of the rising and falling positions of the obtained temperature distribution to the boundary between an interface defect part and a sound part. SOLUTION: A coating surface temperature distribution can be obtained by the non-steady FEM(finite element method) analysis by modeling a coating member where an interface defect part with a radius of approximately 5 mm exists in the center of a disk sample whose radius is approximately 15 mm as a two-dimensionally and axisymmetrically and by applying uniform heat to the surface. In a temperature distribution line 13, a rising position point 15 of the surface temperature distribution where temperature starts to rise due to an interface defect part exists. Regardless of the shape of the surface temperature distribution line 13, temperature increase due to the interface defect part always starts from the outside of the tip part of the defective part. Therefore, the boundary of the interface defect part/sound part always indicates a larger value than the actual interface defect part when the dimensions of the interface defect part are measured as the rising position point 15 of the surface temperature distribution. More specifically, a safety-side evaluation value can be obtained.
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