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Article Dans Une Revue International Journal of Fatigue Année : 2016

3D simulation of short fatigue crack propagation by finite element crystal plasticity and remeshing

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Henry Proudhon
Jia Li
  • Fonction : Auteur
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  • IdRef : 193338092
F. Wang
Samuel Forest

Résumé

An iterative method to simulate 3D fatigue crack propagation in crystalline materials is proposed and demonstrated on simple test cases. The method relies on the computation of a damage indicator based on plastic activity around the crack tip. By post-processing this quantity after a given loading sequence, local crack direction and growth rate are estimated along the crack path. Dedicated remeshing routines allow the crack to propagate in 3D and the iterative process can continue with the updated crack geometry. Two examples in a BCC single crystal featuring different slip systems demonstrate the crack propagation simulations under cyclic loading over distances comparable to the crystal size and with non-regular crack shapes such as zig-zag crack paths. The effect of transferring plastic fields between propagation steps is also analysed.
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Dates et versions

hal-01237651 , version 1 (03-12-2015)

Identifiants

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Henry Proudhon, Jia Li, F. Wang, A. Roos, Vincent Chiaruttini, et al.. 3D simulation of short fatigue crack propagation by finite element crystal plasticity and remeshing. International Journal of Fatigue, 2016, 82, pp.238-246. ⟨10.1016/j.ijfatigue.2015.05.022⟩. ⟨hal-01237651⟩
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