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Composite hybride modèle de fibres de carbone recyclées

Abstract : The recycling of organic composites reinforced with carbon fibers has been a research theme that has been pursued for several years [1,2,3]. In particular, it has been demonstrated that after a physico-chemical treatment called vapothermolysis, carried outin an environment of superheated steam [3], the properties of the recovered fibers were preserved [1,2]. Previous studies have also shown the importance of textile processes in the quality and properties of second-generation composites, especially for those based on mats [1,2].From carbon fibers (T700, T300, IM7) of length (50, 80 and 110mm), nonwoven mats were manufactured by carding. These non-woven mats were implemented by thermo-compression with PA6 films, to make composite plates PA6-T700-T300-IM7. The plates were cut into specimens in the machine output direction (MD) (direction of the roll) and in the transverse direction (CD). These specimens were mechanically tested in tension and bending.The results show anisotropy of tensile (and flexural) properties. This anisotropy has also been observed on the fibrous architecture of mat by implementing image analysis technique coupled to a Fourier transform orientation analysis. The results were compared to classical laminates theory. This analysis demonstrates that this composite breaks up when (or soon after) the pliesat +/-45 breaksby tensile matrix cracking.
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  • HAL Id : hal-02423977, version 1

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Florentin Berthet, Sabrine Jlassi, Gérard Bernhart. Composite hybride modèle de fibres de carbone recyclées. JNC 21 : Journées Nationales sur les Composites 2019, École Nationale Supérieure d'Arts et Métiers (ENSAM) - Bordeaux, Jul 2019, Bordeaux, Talence, France. 8 p. ⟨hal-02423977⟩

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