Integral identities for thermodiffusive interfacial cracks

Abstract eng:
The problem of a crack at the interface between dissimilar materials in presence of thermodiffusion is formulated in terms of boundary integral equations by means of an original approach based on generalized Betti’s theorem and weight functions. Integral identities relating the applied loading, the temperature, mass concentration, heat and mass fluxes on the fracture surfaces and the resulting crack opening are derived and accompanied by some examples of applications. The proposed approach can represent a powerful tool for studying the effects of temperature and heat flux distributions on fracture processes at the interface between different components in energy devices possessing multi-layered structures, such as solid oxide fuel cells.

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