%0 Journal Article
%T Multi scale analysis by acoustic emission of damage mechanisms in natural fibre woven fabrics/epoxy composites.
%A Bonnafous C.
%A Touchard F.
%A Chocinski-Arnault L.
%J EPJ Web of Conferences
%D 2010
%I 
%R 10.1051/epjconf/20100620009
%X This paper proposes to develop an experimental program to characterize the type and the development of damage in composite with complex microstructure. A multi-scale analysis by acoustic emission has been developed and applied to hemp fibre woven fabrics/epoxy composite. The experimental program consists of tensile tests performed on single yarn, neat epoxy resin and composite materials to identify their AE amplitude signatures. A statistical analysis of AE amplitude signals has been realised and correlated with microscopic observations. Results have enabled to identify three types of damage in composites and their associated AE amplitudes: matrix cracking, interfacial debonding and reinforcement damage and fracture. Tracking of these damage mechanisms in hemp/epoxy composites has been performed to show the process of damage development in natural fibre reinforced composites.
%U http://dx.doi.org/10.1051/epjconf/20100620009