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Comportement thermomécanique d'éléments de structures composites en milieu cryogénique extrême

Abstract : Cryomagnet supports of the LHC particle accelerator are manufactured in E-glass/epoxy composite materials with textile reinforcement due to their low thermal conductivity and high specific stiffness. These supports are subjected to complexes thermal and mechanical loading which require a thorough study of their response. A multi-scale method is used in this study. It is based on two successive homogenisations in order to take into account the strong thermal dependence of elastic modulus and thermal strain of the resin on the one hand and the phonons mechanism which modifies the thermal transfer at fibres/matrix interfaces for the temperatures lower than 10 K on the other hand.
At each step of this study, results of the models are validated by experimental results of thermal conductivity and elastic modulus for temperatures ranging between 4.2K and 293K.
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https://tel.archives-ouvertes.fr/tel-00202309
Contributor : Arnaud Alzina <>
Submitted on : Saturday, January 5, 2008 - 1:09:57 AM
Last modification on : Wednesday, May 11, 2016 - 1:20:17 PM
Long-term archiving on: : Tuesday, April 13, 2010 - 4:17:56 PM

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  • HAL Id : tel-00202309, version 1

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Arnaud Alzina. Comportement thermomécanique d'éléments de structures composites en milieu cryogénique extrême. Mécanique [physics.med-ph]. Université Blaise Pascal - Clermont-Ferrand II, 2005. Français. ⟨tel-00202309⟩

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