A permeable interface crack between dissimilar thermopiezoelectric media

This paper presents an explicit treatment of the generalized 2D thermopiezo electric problem of an interfacial crack between two dissimilar thermopiezo electric media by means of the extend Stroh formalism. In comparison with t he other relevant studies, the present work has two features: one is that t he crack is assumed to be a permeable slit across which the normal electric displacement and the tangential electric field are continuous. The other i s that the heat loading is applied at infinity, rather than on the crack fa ces. As a result, the field intensity factors and the electric field inside the crack are obtained in explicit closed-forms, respectively. As examples , the solutions of several particular cases, including that of an impermeab le crack and that of a homogeneous material with a crack are also presented . It is shown that the electric field inside a crack may be singular and os cillatory for the case of an interfacial crack, while for the case of a cra ck in a homogeneous medium it is linearly variable. Moreover, it is also fo und that for a homogeneous medium with a crack the stress intensity factors based on the impermeable model and permeable model are same, but the inten sity factor of the electric displacement is not.