Identification and Modelling of the In-Plane Reinforcement Orientation Variations in a CFRP Laminate Produced by Manual Lay-Up

Abstract : Reinforcement angle orientation has a significant effect on the mechanical properties of composite materials. This work presents a methodology to introduce variable reinforcement angles into finite element (FE) models of composite structures. The study of reinforcement orientation variations uses meta-models to identify and control a continuous variation across the composite ply. First, the reinforcement angle is measured through image analysis techniques of the composite plies during the lay-up phase. Image analysis results show that variations in the mean ply orientations are between −0.5 and 0.5° with standard deviations ranging between 0.34 and 0.41°. An automatic post-treatment of the images determines the global and local angle variations yielding good agreements visually and numerically between the analysed images and the identified parameters. A composite plate analysed at the end of the cooling phase is presented as a case of study. Here, the variation in residual strains induced by the variability in the reinforcement orientation are up to 28% of the strain field of the homogeneous FE model. The proposed methodology has shown its capabilities to introduce material and geometrical variability into FE analysis of layered composite structures.
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https://hal.archives-ouvertes.fr/hal-01841945
Contributeur : Yves Davila <>
Soumis le : mardi 17 juillet 2018 - 16:37:22
Dernière modification le : mercredi 18 juillet 2018 - 15:05:45

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Yves Davila, Laurent Crouzeix, Bernard Douchin, Francis Collombet, Yves-Henri Grunevald. Identification and Modelling of the In-Plane Reinforcement Orientation Variations in a CFRP Laminate Produced by Manual Lay-Up. Applied Composite Materials, Springer Verlag (Germany), 2018, 25 (3), pp.647 - 660. 〈10.1007/s10443-017-9642-4〉. 〈hal-01841945〉

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