A Study on Estimation of the Probability Distribution of Fatigue Crack Growth Life for Steels |
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강의 피로균열전파수명의 확률분포 추정에 관한 연구 |
김선진,윤성환,전창환,김일석 |
부경대학교 기계공학부,부경대학교 기계공학부,부경대학교 기계공학부,부경대학교 기계공학부 |
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© 2000 The Korean Society of Ocean Engineers
Open access / Under a Creative Commons License
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Keywords:
Probability distribution, Fatigue crack growth life, Reliability assessment, Stochastic process, Specimen thickness |
핵심용어:
확률분포, 피로균열전파수명, 신뢰성평가, 확률과정, 시험편두께 |
Abstract |
Presented are the estimation of the probability distribution of fatigue crack growth life and reliability assessment of structures by simulating material resistance to fatigue crack growth along a crack path. The material resistance is treated as a Weibull stochastic process. A non-Gaussian stochastic fields simulation method proposed by shimozuka, et al is applied with the statistical data obtained experimentally. Test results are obtained for $delta K$ constant amplitude load in tension with stress ratio of R=0.2 and three specimen thicknesses of 6,12 and 18mm. This simulation method is useful to estimate the probability distribution of fatigue crack growth life and the smallest life. |
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