Stress intensity factors for cracks emanating from a circular hole in a finite orthotropic lamina

The stress intensity factors (SIF) for cracks emanating from a circular hole in a finite orthotropic lamina subjected to i) uniaxial loading, ii) biaxial loading and iii) mixed boundary condition are obtained using the modified mapping collocation method. The presented analysis is based on choosing the stress functions satisfying the stress free boundary condition along the crack. The coefficients of the stress functions are determined by satisfying the boundary condition on the border of the lamina. The effect of hole radius, crack length, width of lamina, for various fibre orientations and, biaxial loading factor, mixed boundary condition for fibre orientation 90° on stress intensity factors is reported.