• Ratsifandrihana, Léon
• Journoud, Pierre
• Bouvet, Christophe
• Dubary, Nicolas
• Rivallant, Samuel

Abstract

Thanks to their low mass and high performances, composites drawan increasing interest in many fields, such as aeronautics. Nevertheless, composites structures are particularly vulnerable to out-of-plane solicitations.Research [1-3] have shown differences between woven and unidirectional composites. Woven composites have better damage tolerances thanks to textile architecture and mechanisms of effort diffusion [4]. Moreover, they have better properties on out-of-plan solicitations and a greater dissipative power than unidirectional composites.Woven composites have shown a particular interest for aeronautical manufacturers, yet their breaking mechanisms remain complex.This study is focused on failure mechanisms of woven composite. We used the numerical model which has developed at the Institute Clement Ader over the last years called Discrete Ply Model (DPM), with the aim of simulating tensile tests on notched and unnotched specimens of woven composites. The objective is to study translaminar crack growth propagations and improve the understanding of failure mechanism. We take into consideration the critical energy release rate of the fiber failure in mode I and II, the shearing plasticity and the effect of weaving point.

Topics

• impedance spectroscopy
• crack
• composite
• plasticity
• woven