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Homogénéisation des interfaces ondulées dans les composites

Abstract : Rough surfaces and interfaces are encountered in many situations in mechanics and physics of solids. In particular, a surface or interface considered smooth at a given scale turns out often to be rough at another smaller scale. This work studies the flat and curved interfaces whose roughness can be reasonably described as periodic undulations. It aims to model these interfaces in composites and to determine their effects on the effective elastic and conductive properties of the composites in question. The approach elaborated to achieve this objective consists first in using asymptotic analysis to model a zone of rough interface as an interphase being heterogeneous only along its thickness direction and then in resorting to some micromechanical schemes to quantify the influences of the interphase on the effective properties. This work considers three types of composites in which periodically corrugated interfaces are present: laminated, fibrous and particulate composites. The results obtained for these composites contribute to the development of micromechanics and provide solutions to problems of practical interest encountered in physics and mechanics of heterogeneous materials
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Huy Toan Le. Homogénéisation des interfaces ondulées dans les composites. Autre. Université Paris-Est, 2011. Français. ⟨NNT : 2011PEST1096⟩. ⟨tel-00647889⟩

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