326 AEセンサーの利用によるセラミックスのヤング率測定(非破壊検査)

概要

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It is difficult of the fatigue damage of ceramics because of the damage accumulation of ceramics under fatigue is not so large. The purpose of this study is to evaluate the fatigue damage of a ceramics by the change of Young's modulus of fatigued ceramics, it will need to take an accurate measurement of the Young's modulus of it that had the fatigue test specimens size. In this study, a new and aculeate measuring of the Young's modulus of ceramics that have fatigue test specimen size is proposed. The base of the new method is to measure the velocity of longitudinal elastic stress wave in a slender ceramics specimen. If the velocity of longitudinal elastic stress wave is got, the Young's modulus of the specimen can be calculated by the equation E=C^2 p, where E is Young's modulus, C is velocity of longitudinal stress wave and p is density. In proposed method, the velocity of the longitudinal stress wave in ceramics specimen measured by means of AE-sensor.
社団法人日本機械学会の論文
2000-06-23