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Article Dans Une Revue International Journal of Fatigue Année : 2012

Cyclic behaviour of structures under thermomechanical loadings: Application to exhaust manifolds

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Aurélie Benoit À La Guillaume
Habibou Maitournam
Luc Rémy
  • Fonction : Auteur
F. Oger
  • Fonction : Auteur

Résumé

A structure subjected to thermomechanical cyclic loadings may exhibit various cyclic behaviours: perfect elasticity, elastic shakedown, plastic shakedown and ratchetting. The quantitative characterization of these different asymptotic states is addressed in this paper, in the context of the Generalized Standard Materials (GSM). Criteria are established to identify them and capture the trend line of their evolution, in the context of numerical simulation. The definitions are extended to the case of temperature dependent mechanical properties. Simple strain paths are first considered to illustrate the relevancy of the proposition. Finally, as an application, the example of an exhaust manifold subjected to a classical thermomechanical fatigue test is analyzed.
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Dates et versions

hal-00676003 , version 1 (02-03-2012)

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Aurélie Benoit À La Guillaume, Habibou Maitournam, Luc Rémy, F. Oger. Cyclic behaviour of structures under thermomechanical loadings: Application to exhaust manifolds. International Journal of Fatigue, 2012, 38, pp.65-74. ⟨10.1016/j.ijfatigue.2011.11.012⟩. ⟨hal-00676003⟩
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