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milieu déformable

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Relaxation de contraintes et fissurations induites par une redistribution d'eau en milieu biphasique élastique
Ibrahim Mrani, Jean-Claude Bénet
Journal:

Mechanics & Industry / Volume 6 / Issue 5 / September 2005

Published online by Cambridge University Press:

04 November 2005, pp. 529-538

Print publication:

September 2005
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À partir d'un modèle de transport d'eau en milieu biphasique et élastique [I. Mrani, J.-C. Bénet, G. Fras, Transport of water in a biconstituant elasticmedium, Appl. Mech. Rev., special issue on Mechanics of swelling 48 (1995) 717–721], on examine dans cette étude les risques de fissurationsinduites par la redistribution d'eau dans un échantillon de forme cylindriqueaprès séchage. La résolution numérique de l'équation de transport de l'eau et del'équation d'équilibre mécanique donnent accès à l'évolution de la teneur eneau, de la déformation et des contraintes dans le milieu. On s'intéressera àl'état du matériau pendant les phases de séchage, de refroidissement et destockage. À l'issue de cette étude, les risques de fissuration sont analyséspour différents scénarios de séchage, qui déterminent l'évolution de l'étathydrique pendant le stockage.