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Contribution à l’étude des conditions de tressage d’armures textiles hautes performances : application à l’identification des rigidités élastiques de coques composites 2D et 3D

Abstract : In the first part of the thesis, based on literature results, we synthesize the main difficulties that limit the development of composite materials for automotive applications. Furthermore, we examine what are the scientific and technical issues for the prediction of the mechanical performances of braided technical textiles. Consequently, our effective research work follows three main axes: In a first phase, we analyse different parameters that influence the braiding process, and we propose a new analytical formulation describing the yarn positioning on complex shaped mandrels. In a second phase, we perform an experimental analysis of the mechanical properties of braided composites testing tubular structures under complex loading conditions, to evaluate the influence of internal heterogeneousness on the structural behaviour. In the last phase, we consider and validate a modelling approach where numerical results are obtained from laminated composite theory, taking into account the local orientation of yarns. Finally, we are able to suggest different optimised design ways applied to braided composites structures
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Submitted on : Monday, June 15, 2020 - 2:51:15 PM
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  • HAL Id : tel-02868524, version 1

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Guillaume Guyader. Contribution à l’étude des conditions de tressage d’armures textiles hautes performances : application à l’identification des rigidités élastiques de coques composites 2D et 3D. Matériaux composites et construction. Université Claude Bernard - Lyon I, 2012. Français. ⟨NNT : 2012LYO10299⟩. ⟨tel-02868524⟩

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