Abstract

The boundary integral equations, which give the relation between the crack opening displacement and traction on the surface of a crack embedded in an infinite isotropic elastic body are formulated. The integral equations are transformed into spherical and cylindrical coordinates in the cases of cracks curved in the shape of spherical and cylindrical surfaces respectively, so that these boundary integral equations may be converted into a system of algebraic equations by the boundary element method. The dependence of stress-intensity factors on the curvature of crack has been numerically calculated for the spherical crack with circular contour under a constant load.

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