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 characterization and numerical modeling of the influence of a proof load on the fatigue resistance of welded structures Article dans une revue avec comité de lectureHEYRAUD, Hugo; MAREAU, Charles; LEFEBVRE, Fabien; AMUZUGA, Philippe; HAUTEVILLE, Robin; MOREL, Franck; JUBIN, Laurent; BELLETT, Daniel; LEBLANC, Théo (Elsevier BV, 2023-03-11)The influence of a proof load, or an initial overload, on the fatigue resistance of welded structures is investigated in this study. Arc welded stiffeners made of S355 steel are considered and fatigue-tested in as-welded ...
A continuum damage mechanics-based approach for the high cycle fatigue behavior of metallic polycrystals Article dans une revue avec comité de lecturePolycrystalline elasto-plasticity models provide a general framework for investigating the effect of microstructural heterogeneities (e.g. grains, inclusions, pores) on the high cycle fatigue behavior of metallic materials. ...
Experimental study of the impact of geometrical defects on the high cycle fatigue behavior of polycrystalline aluminium with different grain sizes Article dans une revue avec comité de lectureGeometrical defects are known to have a detrimental influence on the high cycle fatigue resistance of metallic alloys, smaller defects being less harmful. In this experimental work, the influence of the defect size on the ...
A crystal plasticity based approach for the modelling of high cycle fatigue damage in metallic materials Article dans une revue avec comité de lectureIn this paper, a polycrystalline model is proposed to describe the fatigue behaviour of metallic materials in the high cycle fatigue regime. The model is based on a multiscale approach, which allows the connection of local ...