Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 32, Issue 11, Pages 1823-1834Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2010.05.001
Keywords
Boundary element method; Structural reliability; Fatigue; Crack growth
Funding
- Sao Paulo State Foundation for Research - FAPESP
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Fatigue and crack propagation are phenomena affected by high uncertainties, where deterministic methods fail to predict accurately the structural life. The present work aims at coupling reliability analysis with boundary element method. The latter has been recognized as an accurate and efficient numerical technique to deal with mixed mode propagation, which is very interesting for reliability analysis. The coupled procedure allows us to consider uncertainties during the crack growth process. In addition, it computes the probability of fatigue failure for complex structural geometry and loading. Two coupling procedures are considered: direct coupling of reliability and mechanical solvers and indirect coupling by the response surface method. Numerical applications show the performance of the proposed models in lifetime assessment under uncertainties, where the direct method has shown faster convergence than response surface method. (C) 2010 Elsevier Ltd. All rights reserved.
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