Study of the tow buckling defect during the complex shape forming of synthetic and vegetal fibre reinforced structural composites

Mohamed Medhat Salem (1) , Emmanuel de Luycker (1) , Marina Fazzini (1) , Pierre Ouagne (1)

1 LGP - Laboratoire Génie de Production

Fibrous reinforcements for structural composites manufacturing need to undergo in certain cases a complex shape forming process during which multiple defects could appear. These defects, such as tow buckling and tow sliding may reduce the integrity of the final part. The onset of these defects depends on the initial loading conditions, the shape of the preform and the characteristics of the textile material. While mechanisms behind the formation and development of both defects are yet to be fully understood. We focused, in this work, on investigating the buckling defect. In order to do so, we used optical field measurement techniques to monitor the kinematics of the defect appearance and predict it via an adapted analytical model of the defect appearance.

Mots clés: Composite manufacturing; Preforming defects; Textile reinforcement; Tow buckling; Full field strain measurement

Domaines: Mécanique des matériaux [physics.class-ph]

Mohamed Medhat Salem, Emmanuel de Luycker, Marina Fazzini, Pierre Ouagne. Study of the tow buckling defect during the complex shape forming of synthetic and vegetal fibre reinforced structural composites. 22nd Strutex International Conference Structure and structural mechanics of textiles, Dec 2018, Liberec, Czech Republic. pp.41-45. ⟨hal-03355946⟩