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A multiscale fatigue life model for complex cyclic multiaxial loading

Abstract : The paper deals with the estimation of the lifetime of structures in high-cycle fatigue. The methodology adopted is a multiscale approach based on the following points: (i) at the macroscopic scale, the material is in elastic shakedown; (ii) at the mesoscopic scale the material presents an elastic shakedown (infinite life), or a plastic shakedown or ratcheting (finite life); (iii) the material behavior, at the mesoscopic scale, is hydrostatic stress dependent due to crack nucleation processes; (iv) damage is governed by the mesoscopic accumulated plastic strain per stabilized cycle. The model has six parameters. A simplified version and a robust identification procedure are proposed. A validation by comparing simulated lifetimes to experimental ones is carried out.
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Contributor : Habibou Maitournam Connect in order to contact the contributor
Submitted on : Tuesday, October 12, 2010 - 10:58:33 AM
Last modification on : Saturday, October 22, 2022 - 4:55:46 AM



Habibou Maitournam, Cécile Krebs, André Galtier. A multiscale fatigue life model for complex cyclic multiaxial loading. International Journal of Fatigue, 2011, 33 (2), pp.232-240. ⟨10.1016/j.ijfatigue.2010.08.017⟩. ⟨hal-00525572⟩



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