Probabilistic prediction of fatigue damage based on linear fracture mechanics
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 importan...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2017-01-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero39/numero_39_art_15.pdf |
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| author | M. Krejsa L. Koubova J. Flodr J. Protivinsky Q. T. Nguyen |
| author_facet | M. Krejsa L. Koubova J. Flodr J. Protivinsky Q. T. Nguyen |
| author_sort | M. Krejsa |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-b1faa2f27396451fb70a28259b58171a |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-b1faa2f27396451fb70a28259b58171a2025-01-03T00:39:21ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932017-01-01113914315910.3221/IGF-ESIS.39.15Probabilistic prediction of fatigue damage based on linear fracture mechanicsM. Krejsa0L. Koubova1J. Flodr2J. Protivinsky3Q. T. Nguyen4VSB-Technical University of Ostrava, Faculty of Civil Engineering, Department of Structural Mechanics, Ludvika Podeste 1875/17, 708 33 Ostrava – Poruba, Czech RepublicVSB-Technical University of Ostrava, Faculty of Civil Engineering, Department of Structural Mechanics, Ludvika Podeste 1875/17, 708 33 Ostrava – Poruba, Czech RepublicVSB-Technical University of Ostrava, Faculty of Civil Engineering, Department of Structural Mechanics, Ludvika Podeste 1875/17, 708 33 Ostrava – Poruba, Czech RepublicVSB-Technical University of Ostrava, Faculty of Civil Engineering, Department of Structural Mechanics, Ludvika Podeste 1875/17, 708 33 Ostrava – Poruba, Czech RepublicVSB-Technical University of Ostrava, Faculty of Civil Engineering, Department of Structural Mechanics, Ludvika Podeste 1875/17, 708 33 Ostrava – Poruba, Czech RepublicPaper 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.http://www.gruppofrattura.it/pdf/rivista/numero39/numero_39_art_15.pdfDirect Optimized Probabilistic CalculationDOProCFatigue crackLinear fracture mechanicsProbability of failure |
| spellingShingle | M. Krejsa L. Koubova J. Flodr J. Protivinsky Q. T. Nguyen Probabilistic prediction of fatigue damage based on linear fracture mechanics Fracture and Structural Integrity Direct Optimized Probabilistic Calculation DOProC Fatigue crack Linear fracture mechanics Probability of failure |
| title | Probabilistic prediction of fatigue damage based on linear fracture mechanics |
| title_full | Probabilistic prediction of fatigue damage based on linear fracture mechanics |
| title_fullStr | Probabilistic prediction of fatigue damage based on linear fracture mechanics |
| title_full_unstemmed | Probabilistic prediction of fatigue damage based on linear fracture mechanics |
| title_short | Probabilistic prediction of fatigue damage based on linear fracture mechanics |
| title_sort | probabilistic prediction of fatigue damage based on linear fracture mechanics |
| topic | Direct Optimized Probabilistic Calculation DOProC Fatigue crack Linear fracture mechanics Probability of failure |
| url | http://www.gruppofrattura.it/pdf/rivista/numero39/numero_39_art_15.pdf |
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