Evolution du bilan énergétique dans les matériaux métalliques sous sollicitation cyclique.
Communication avec acte
In the case of cyclic plasticity, the validity of a constitutive model is usually assessed using stress-strain curves. However, this description can be enriched by adopting an energetic point of view. Thus, in the present work, a multiscale model is developed to estimate the amount of energy which is either dissipated into heat or stored in the material in a medium carbon steel under cyclic loading. The results emphasize the heterogeneous aspect of the stored and dissipated energy fields at a microscopic scale.
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Article dans une revue avec comité de lectureHEYRAUD, Hugo; ROBERT, Camille; MAREAU, Charles; BELLETT, Daniel; MOREL, Franck; BELHOMME, Nicolas; DORE, Olivier (Elsevier BV, 2021-02-14)Weld toes and weld roots of continuously welded structures subjected to cyclic loading are critical zones in terms of the fatigue resistance. The finite element method coupled with a fatigue criterion is commonly used to ...
Experimental and numerical study of the evolution of stored and dissipated energies in a medium carbon steel under cyclic loading Article dans une revue avec comité de lectureMAREAU, Charles; CUILLERIER, Daniel; MOREL, Franck (Elsevier, 2013)To obtain robust estimations of the fatigue limit from energy-based fatigue criteria, constitutive laws must include a correct description of the energy balance when modeling the cyclic behavior. The present paper aims at ...
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