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Etude et modélisation de l'endommagement mécanique des matériaux composites sous l'effet de l'humidité : Couplage hydrolyse et endommagement.

Abstract : The present study deals with the wet durability and fatigue damage of organic matrix composite (OMC) materials. The diffusion of water in a SMC material (polyester matrix reinforced with glass fibers and particles of chalks) is first analyzed experimentally. Then it is modeled numerically under different conditions of hygrothermal aging in immersion. The physical mechanisms causing the hygrothermal damage are then identified. Decreases of different mechanical properties as a function of time and of the absorbed water content are highlighted with the identified damage phenomena. The effect of hygrothermal damage on fatigue life is then studied experimentally. A predictive model that takes into account the effects of waterborne and mechanical damage is then proposed. A coupled diffusion / mechanical calculation makes it possible to determine the overall behavior of the material. It is shown that it is possible to simulate and to follow continuously the evolution of the fatigue life of the aged material whatever the time and temperature.
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  • HAL Id : tel-02478886, version 1

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Abir Abdessalem. Etude et modélisation de l'endommagement mécanique des matériaux composites sous l'effet de l'humidité : Couplage hydrolyse et endommagement.. Autre [cond-mat.other]. Ecole nationale supérieure d'arts et métiers - ENSAM; Université du Centre (Sousse, Tunisie), 2019. Français. ⟨NNT : 2019ENAM0042⟩. ⟨tel-02478886⟩

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