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Analyse multi-échelle du comportement hygro-mécanique des fibres de lin

Abstract : Natural fibres used as reinforcement in composite materials present specific mechanical properties, which are comparable to glass fibres. In addition, they have the advantage of being renewable and recyclable. But, their main drawback is their inherent susceptibility to moisture expansion, which has the effect of inducing a decrease in mechanical properties, and of debonding and fracturing interface in the composite. The main aim of this thesis is to study the influence of humidity on hygro-mechanical behavior of flax fibres. The first part of my work was deal with the characterization of mechanical and hygroscopic properties of the fibre and the composite. The second part is dedicated to the development of two multiscale models, one analytical and one numerical. They have been developed for the estimation of hygro-mechanical properties of elementary flax fibres. Properties identified in the first part of the work are used as input data.
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Submitted on : Monday, October 15, 2012 - 3:32:13 PM
Last modification on : Tuesday, April 20, 2021 - 11:22:12 AM
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  • HAL Id : tel-00741951, version 1


Agnès Roudier. Analyse multi-échelle du comportement hygro-mécanique des fibres de lin. Autre. Université Blaise Pascal - Clermont-Ferrand II, 2012. Français. ⟨NNT : 2012CLF22237⟩. ⟨tel-00741951⟩



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