Interaction of the mode III interface crack with a thin stiff nonideal interface

Asymptotic behaviour of the elastic solution in a vicinity of the interface crack tip lying at a nonideal interface is investigated. The interface is assumed to be essentially stiffer in comparison with the bonded elastic materials. Additionally, inhomogeneity of the interface material is taken into account. The simplest case of the Mode III deformation is under consideration. It is shown that the main terms of asymptotic behaviour are practically similar to those in the case of the ideal interface (but with different SIFs in each materials). Moreover, for some special loading there is no difference between the models at all. However, in a general case, additional singular terms of stresses can appear for the stiff nonideal interface model.