A probabilistic model for fatigue crack growth under random loading |
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| Affiliation: | 1. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China;2. College of Mechanical Engineering, Guangxi University, Nanning 530004, China;1. INSA Centre Val de Loire, Laboratoire de Mécanique G. Lamé, Campus de Blois, Equipe DivS, 3 rue de la chocalaterie, 41000 Blois, France;2. IFSTTAR, Laboratoire Mast – EMGCU, 14-20 Boulevard Newton, Cité Descartes, 77447 Marne-la-Vallée Cedex 2, France |
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| Abstract: | A model for predicting fatigue crack growth rate and life probabilistically under random load history is presented. It allows for random growth per cycle, and is based on experimental results of constant amplitude cyclic loads. Predictions of the model are on the conservative side at the same time avoiding overdesigning. The reliability is included in the model thereby avoiding the need for using a factor of safety or ignorance in estimating a fatigue life or a crack length after N cycles of load application. The model is computer-oriented. |
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