Displacement and rotation fields measurement using Finite Element Stereo Digital Image Correlation
Résumé
The aim of this study is to measure, with stereo digital image correlation (DIC), the displacements and rotations at the boundary of a plate subjected to complex loadings. With classical DIC techniques, the measured field is the displacement of the upper skin only. The rotations are usually estimated a posteriori by numerical differentiation and filtering. Unfor-tunately additional uncertainties mayarise with these steps. Conversely, the use of a finite element model is proposed here to regularize a stereo FE-DIC measurement. For that a for-mulation of the DIC problem using the 3D displacement as primary unknown is used.