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Modélisation du comportement effectif du combustible MOX parune analyse micromécanique en champs de transformation non uniformes
Rodrigue Largenton, Jean-Claude Michel, Pierre Suquet, Renaud Masson
Journal:

Mechanics & Industry / Volume 12 / Issue 3 / 2011

Published online by Cambridge University Press:

20 July 2011, pp. 175-181

Print publication:

2011
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La répartition hétérogène du plutonium dans le combustible nucléaire MOX implique que lamodélisation de son comportement, durant l’irradiation en réacteur à eau pressurisée,passe par la construction de lois macroscopiques faisant intervenir les effetsmicrostructuraux. Pour homogénéiser ce problème local, nous avons choisi une méthoded’analyse par champs de transformation non uniformes, abrégé anglais NTFA (J.-C. Michel,P. Suquet, Int. J. Solids Struct. 40 (2003) 6937–6955). Nous présentons donc ici, lestravaux menés sur ce modèle pour l’adapter au comportement du MOX en service, ainsi qu’unecomparaison des résultats globaux et locaux de ce modèle à des calculs de référence.