| 摘要 |
PURPOSE:To observe the development of a defect part with high accuracy and to easily find a material constant by photographing a defect part as an image by radiation transmission while stressing a ceramics member, and calculating a feature quantity corresponding to the kind of the defect part. CONSTITUTION:The progress state of the defect part of the ceramics material member 1, e.g. a crack 3 made in the ceramics member 1 in tension mode is picked up as an image by using an X ray, etc., while a tensile load is placed. Then the image of only the crack 3 is obtained and the crack is observed in real time. The obtained image is processed to find, for example, a stress expansion coefficient.K1-crack growing speed.V curve, and a critical stress expansion coefficient.KIC value, etc., can be quantized. Consequently, the development of the crack 3 is observed with high accuracy and the material constant is easily found.
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