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Structural Engineering and Mechanics Volume 60, Number 1, October10 2016 , pages 71-90 DOI: https://doi.org/10.12989/sem.2016.60.1.071 |
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A probabilistic analysis of Miner\'s law for different loading conditions |
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Sergio Blasón, José A.F.O. Correia, Abílio M.P. De Jesus, Rui A.B. Calçada and Alfonso Fernández-Canteli
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| Abstract | ||
| In this paper, the normalized variable V=(log N-B)(log Ao-C), as derived from the probabilistic S-N field of Castillo and Canteli, is taken as a reference for calculation of damage accumulation and probability of failure using the Miner number in scenarios of variable amplitude loading. Alternative damage measures, such as the classical Miner and logarithmic Miner, are also considered for comparison between theoretical lifetime prediction and experimental data. The suitability of this approach is confirmed for it provides safe lifetime prediction when applied to fatigue data obtained for riveted joints made of a puddle iron original from the Fão bridge, as well as for data from experimental programs published elsewhere carried out for different materials (aluminium and concrete specimens) under distinct variable loading histories. | ||
| Key Words | ||
| fatigue; cumulative damage; Miner | ||
| Address | ||
| Sergio Blasón and Alfonso Fernández-Canteli: Engineering Faculty of Gijón, University of Oviedo, Campus de Viesques, 33203 Gijón, Spain José A.F.O. Correia, Abílio M.P. De Jesus and Rui A.B. Calçada: Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal | ||