Étude numérique du comportement en fatigue à grand nombre de cycles dagrégats polycristallins de cuivreReportar como inadecuado




Étude numérique du comportement en fatigue à grand nombre de cycles dagrégats polycristallins de cuivre - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1 LAMPA - Laboratoire Arts et Métiers ParisTech d-Angers 2 I2M - Institut de Mécanique et d-Ingénierie de Bordeaux 3 LAMPA - PMD - Laboratoire des Arts et Métiers ParisTech d-Angers - Procédés Matériaux Durabilité

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.

Mots-clés : Fatigue simulation numérique agrégats polycristallins





Autor: Camille Robert - Nicolas Saintier - Thierry Palin-Luc - Franck Morel -

Fuente: https://hal.archives-ouvertes.fr/



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