On the Use of Digital Image Correlation to Analyze the Mechanical Properties of Brittle Matrix Composites
Résumé
The 2D digital image correlation technique needs a single CCD camera to acquire the surface patterns of a region of a specimen in the undeformed and deformed states. With two images, one can determine in-plane displacement and strain fields. Its performance is assessed and discussed in real experimental situations. Thanks to its sub-pixel resolution, it can be used to monitor experiments even for brittle and quasi-brittle materials, namely materials for which the strain levels remain low (less than 0.1% in many cases). Two examples are given. Firstly, elastic properties of BraSiC (a silicon-based braze to assemble SiC/SiC composites) are extracted from kinematic fields estimated by utilizing a digital image correlation method. Secondly, the technique is utilized to analyze experimental results of a plane shear experiment and validate a damage model describing different degradations in a C/C composite material.
Fichier principal
ACERS1-3-ccsd.pdf (308.39 Ko)
Télécharger le fichier
ACERS1-1-ccsd.pdf (423.97 Ko)
Télécharger le fichier
ACERS1-2-ccsd.pdf (273.81 Ko)
Télécharger le fichier
Loading...