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Étude numérique du comportement en fatigue à grand nombre de cycles d’agrégats polycristallins de cuivre

Article dans une revue avec comité de lecture
Author
ROBERT, Camille
211916 Laboratoire Angevin de Mécanique, Procédés et InnovAtion [LAMPA]
ccSAINTIER, Nicolas
ccPALIN-LUC, Thierry
ccMOREL, Franck
206863 Laboratoire des Arts et Métiers ParisTech d'Angers - Procédés Matériaux Durabilité [LAMPA - PMD]

URI
http://hdl.handle.net/10985/8269
DOI
10.1051/meca/2011109
Date
2011
Journal
Mécanique et Industries

Abstract

Numerical study of high cycle fatigue behaviour of copper polycrystalline aggre- gates. An analysis of high cycle fatigue behaviour is undertaken via the numerical simulation of polycrystalline aggregates. The metallic material chosen for investigation is Copper, which has a FCC crystalline structure. The REV, which is composed of 300 randomly orientated equiaxed grains, is loaded at the fatigue limit determined at 10/7 cycles. The aim is to calculate the mechanical quantities at the mesoscopic scale (average quantities in the grains) after cyclic stabilisation has been achieved. The results highlight the fact that the mechanical quantities at this scale have a large scatter. A statistical analysis of the response of the aggregate for different loading conditions (tensile, torsion, and in-phase tension-torsion) is done. Thanks to the sufficiently large number of different microstructures investigated, a critical analysis of the Dang Van and Crossland multiaxial fatigue criteria has been undertaken, using the local mechanical quantities.

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  • Institut de Mécanique et d’Ingénierie de Bordeaux (I2M)
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