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A Statistical Analysis on Fatigue Life Distribution in Spheroidal Graphite Cast Iron
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 Title & Authors
A Statistical Analysis on Fatigue Life Distribution in Spheroidal Graphite Cast Iron
Jang, Seong-Su; Kim, Sang-Tae;
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Statistical fatigue properties of metallic materials are increasingly required for reliability design purpose. In this study, static and fatigue tests were conducted and the normal, log-normal, two -parameter Weibull distributions at the 5% significance level are compared using the Kolmogorov-Smirnov goodness-of-fit test. Parameter estimation were compared with experimental results using the maximum likelihood method and least square method. It is found that two-parameter Weibull distribution and maximum likelihood method provide a good fit for static and fatigue life data. Therefore, it is applicable to the static and fatigue life analysis of the spheroidal graphite cast iron. The P-S-N curves were evaluated using log-normal distribution, which showed fatigue life behavior very well.
P-S-N Curve;Probability Paper;Scale Parameter;Lognormal Distribution;Weibull Distribution Function;Spheroidal Graphite Cast Iron;Reliability;
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피로수명예측을 위한 잔류강도 저하모델의 파라미터 결정법 제안(I),김상태;장성수;

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