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J. Korean Ceram. Soc. > Volume 34(9); 1997 > Article
Journal of the Korean Ceramic Society 1997;34(9): 927.
세라믹스의 피로수명에 대한 통계적 분석
박성은, 김성욱, 이홍림
연세대학교 세라믹공학과
Statistical Analysis for Fatigue Lifetime of Ceramics
Static and cyclic fatigue tests were carried out for alumina specimen to study the statistical analyses (normal, lognormal and Weibull distribution) of fatigue lifetime data and nominal initial crack length data. Fatigue lifetime data followed Weibull distribution better than normal or lognormal distribution, for the shape parameter of the notched specimen was larger than that of the unnotched specimen. The nominal initial crack length data obtained from fatigue lifetime followed the lognormal and Weibull distribution better than normal distribution, for the coefficient of variation of the unnotched specimen was larger than that of the notched specimen, and shape parameter of unnotched specimen was smaller than that of the notched specimen.
Key words: Static fatigue, Cyclic fatigue, Alumina, Normal distribution, Lognormal distribution, Weibull distribution, Fatigue lifetime
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