画像相関法による変位・ひずみ分布測定の基礎とその応用

抄録

The basic principle and some applications of a digital image correlation method are described. Displacements at a point on a planer surface can be determined by searching the position of a subset in an image after deformation in local digital image correlation. On the other hand, displacements at entire nodes of a finite element model are simultaneously determined in global digital image correlation. When global DIC is used, discontinuous displacements and strains can be evaluated. As examples, the crack tip displacement fields and fracture parameter evaluation, the measurement of the discontinuous strains at crystal grain boundaries, and the measurement of the local out-of-plane displacement of a carbon fiber reinforced plastics plate under rapid heating are shown.