Stress Modeling for Cyclic Fatigue Life Prediction of Alumina Ceramics

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J. Korean Ceram. Soc. > Volume 31(10); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(10): 1141.

알루미나 세라믹스의 반복 피로 수명 예측을 위한 응력 모델

이홍림, 박성은, 한봉석

연세대학교 세라믹공학과

Stress Modeling for Cyclic Fatigue Life Prediction of Alumina Ceramics

ABSTRACT

Cyclic fatigue experiment was carried out to predict the life time of alumina ceramics. Four kinds of model were suggested to obtain the adequate representative static stress corresponding to the cyclic stress applied to the alumina specimens. Arithmetic mean stress model gives 21.81 of the crack growth exponent, integrated stress model gives 22.15, maximum stress model gives 24.57, and equivalent static stress model gives 24.43. It is considered that the equivalent static stress model is the most reasonable and gives the best adequate crack growth exponents value.