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Modélisation micromécanique de la croissance et de la percolation de pores sous pression dans une matrice céramique à haute température

Abstract : This study is devoted to the modelling of the elastoplastic behavior with damage of a porous ceramic material with two populations of saturated cavities : the highly irradiated uranium dioxide fuel at high temperature. A multi-scaled approach is followed based on the assumption of the separation of the scales of the two populations of cavities (spherical intragranular cavities and ellipsoidal intergranular cavities) and on the assumption of the macroscopic isotropy. The elastoplastic model with damage proposed in this study successively deals with the elasticity, the yield criterion and the evolution of the internal parameters of the model with the loading. The different pressures in each population of cavities are taken into account for the three states elasticity-plasticity-damage.
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https://tel.archives-ouvertes.fr/tel-00492215
Contributor : Pierre-Guy Vincent <>
Submitted on : Tuesday, June 15, 2010 - 1:35:28 PM
Last modification on : Thursday, January 23, 2020 - 6:22:03 PM
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  • HAL Id : tel-00492215, version 1

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Pierre-Guy Vincent. Modélisation micromécanique de la croissance et de la percolation de pores sous pression dans une matrice céramique à haute température. Mécanique [physics.med-ph]. Université de Provence - Aix-Marseille I, 2007. Français. ⟨tel-00492215⟩

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