Abstract
In order to measure the displacement distributions on material surfaces, many types of image correlation method have been developed in various research fields. In this study, to measure highly accurate displacement field near a crack tip, the local correlation minimization method is proposed based on the image correlation scheme. First, the formulations of the image correlation and the local correlation minimization method are explained in this paper. Then, the corroboration of the local correlation minimization method is carried out by the measuring a known analytical near tip field under mixed-mode loading.
