Mechanical characterization of thin metal sheets by a digital image correlation method

Abstract
In this paper, différent applications of an optical method based on digital corrélation of images is presented. The most important characteristic of this method is that you cari draw a deformation map on the entire surface of the spécimen. This is a non-contact method that is easy to set-up since there is no spécial mounting requirements. Thus, it is a very attractive testing method for thin ductile metal sheets. We propose to analyze différent applications of this method to characterize the material mechanical response using tensile tests. These consist of measuring the clastic properties, characterizing the necking and its propagation up to failure, and the identification of the evolution of damage until rupture. We also prescrit a comparison between finite element simulations and the experimental data obtained by this method.