probabilistic prediction of fatigue damage based on linear fracture mechanics
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ID: 207275
2017
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Abstract
Paper describes in detail and gives example of the probabilistic assessment of a steel structural element subject to fatigue load, particular attention being paid to cracks from the edge and those from surface. Fatigue crack damage depends on a number of stress range cycles. Three sizes are important for the characteristics of the propagation of fatigue cracks - the initial size, detectable size and acceptable size. The theoretical model of fatigue crack progression in paper is based on a linear fracture mechanics. When determining the required degree of reliability, it is possible to specify the time of the first inspection of the construction which will focus on the fatigue damage. Using a conditional probability, times for subsequent inspections can be determined. For probabilistic calculation of fatigue crack progression was used the original and new probabilistic methods - the Direct Optimized Probabilistic Calculation (“DOProC”), which is based on optimized numerical integration. The algorithm of the probabilistic calculation was applied in the FCProbCalc code (“Fatigue Crack Probabilistic Calculation”), using which is possible to carry out the probabilistic modelling of propagation of fatigue cracks in a user friendly environment very effectively.
| Reference Key |
krejsa2017fratturaprobabilistic
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|---|---|
| Authors | ;M. Krejsa;L. Koubova;J. Flodr;J. Protivinsky;Q. T. Nguyen |
| Journal | applied catalysis |
| Year | 2017 |
| DOI |
10.3221/IGF-ESIS.39.15
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| URL | |
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