Thermal Fatigue Life Prediction of Alumina by Finite Difference Model

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J. Korean Ceram. Soc. > Volume 30(3); 1993 > Article

Journal of the Korean Ceramic Society 1993;30(3): 229.

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이홍림, 한봉석

연세대학교 세라믹공학과

Thermal Fatigue Life Prediction of Alumina by Finite Difference Model

ABSTRACT

Thermal history and thermal stress of alumina specimen, which occured from thermal shock process, were calculated by finite difference method. Stress intensity factor and crack growth in cyclic thermal fatigue were calculated from single thermal shock temperature history and thermal stress. Cyclic thermal life were estimated by bending strength after cyclic thermal shock under critical thermal shock temperature. Calculated stress intensity factor was compared with real experimental thermal fatigue life of specimen. Fatigue life until critical stress intensity factor and real experimental result were comparable.