Influence of Material Anisotropy on the Interaction of a Crack with a Free Boundary

Interaction of a single rectilinear crack with the free boundary of a finite-dimension anisotropic elastic plate is considered. It is shown that as the crack tip approaches the plate boundary, the influence of elastic anisotropy of material on stress intensity factors is enhanced. The influence of the degree of anisotropy of the elastic properties of material and crack orientation (fracture mode) on this phenomenon is considered.