1112 超音波疲労試験片の発熱量と温度分布推定(OS11-3 材料の疲労挙動と損傷評価-計測-)

概要

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An ultrasonic fatigue test is an effective measure to obtain very high cycle fatigue lives, but it contains some problems due to its high test frequency. One of problems is self-heating of test pieces which hinders accurate fatigue data collection. In this study, an attempt was made to measure the amount of self-heating in the ultrasonic fatigue test specimen and to estimate the temperature distributions by FE analysis. Though the proposed method required coefficient of heat transfer which can be obtained by the combination between FE analysis and simple experiments, it showed good estimation of the specimen surface temperature in steady state. The method also made it possible to estimate the upper limit condition to perform the ultrasonic fatigue test without self-heating.
2010-10-09