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Mécanismes de fatigue dominés par les fibres dans les composites stratifiés d’unidirectionnels

Abstract : Under quasi-static and fatigue tension loads, the failure of a carbon fibre reinforced polymer laminate (CFRP) is usually driven by 0° plies. Carbon fibres give most of the stiffness and strength of these plies. In this work, the fatigue behaviour of 0° plies inside unidirectional (UD) and multidirectional laminates is analysed via multi-instrumented tension-tension fatigue tests. A numerical and experimental study is addressed to perform fatigue tests without the typical premature failures of the UD laminates. The acoustic emissions technique is used to identify the evolution law of fibre breaks. A finite element model is developed at the microscale (fibres and matrix) to analyse the fibre-driven fatigue mechanisms.
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  • HAL Id : tel-02405402, version 1

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Fabrizio Pagano. Mécanismes de fatigue dominés par les fibres dans les composites stratifiés d’unidirectionnels. Matériaux. Université Paris sciences et lettres, 2019. Français. ⟨NNT : 2019PSLEM039⟩. ⟨tel-02405402⟩

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