Abstract
In this paper, the effect of couple-stresses on the strain energy release rate for an interface crack is examined. An internal pressure is applied on surfaces of the crack situated between two dissimilar half-planes. The oscillatory stress singularities and material overlappings usually appear near the crack tips in the so-called exact solutions. To avoid these irregularities the crack surface displacements and the crack surface rotation are expanded in series of trigonometrical functions. A modified version of the Schmidt method is then used to determine those coefficients in the series. Numerical calculations are carried out to reveal the effect of the couple-stresses on the strain energy release rate for the interface crack.
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