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Utilisation de la corrélation d'images pour le suivi de la mise en forme de renfort textile dans le cadre de la fabrication de pièces composites pour l'aéronautique

Abstract : For several years, structural or semi-structural aeronautics parts manufactured with composite materials have been developped. The geometrical complexity of these parts requires the use of textile preforms with the integration of polymeric yarns in order to optimize the deformability of the fabric during the forming process. Due to the non-linear in plane shear mechanical behavior, local stiffning of the preform appears during this forming. These discontinuities affect the mechanical properties and material health of the final composite part. The objective of this work is to determine the final mechanical properties of a composite part from the forming of the textile reinforcement, using a tracking of the strain field by 3D digital image correlation. The study is divided into three parts: (1) the mechanical characterization of the in plane shear behaviour of the textile reinforcement through Bias tests, (2) drapability tests to establish strain field and shear angles during draping and (3) mechanical tests on the final composite in order to make the link between the shear angles of the textile reinforcement and the mechanical properties of the final composite. According to the firsts part of the study, the shear locking angle of the studied textile reinforcement, a carbon/PPS, is 38.5° ±2.3°. The draping tests show that the shear-locking angle is reached in certain areas for a half-sphere and a parallelepiped shape. The last part of the study is being finalized.
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https://hal.archives-ouvertes.fr/hal-01901684
Contributor : Rébecca Bonnaire <>
Submitted on : Tuesday, October 23, 2018 - 10:35:51 AM
Last modification on : Thursday, March 12, 2020 - 3:14:10 PM
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  • HAL Id : hal-01901684, version 1

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Rébecca Bonnaire, Julien Patou, Emmanuel de Luycker, Thierry Cutard, Gérard Bernhart. Utilisation de la corrélation d'images pour le suivi de la mise en forme de renfort textile dans le cadre de la fabrication de pièces composites pour l'aéronautique. 23ème Congrès Français de Mécanique, Aug 2017, Lille, France. ⟨hal-01901684⟩

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