Mechanics of finite crack considering interfacial elasticity

Abstract eng:
In this work we consider delamination and debonding phenomena in bi-material interfaces through a general formulation for two-dimensional (2-D) anisotropic elasticity while accounting for the interfacial structure by means of an interfacial elasticity paradigm. The elasticity formulation considers the necessary and sufficient conditions for a non-oscillatory, 2-D crack-tip stress field based on the Stroh formalism, while the interfacial mechanics is incorporated by employing a generalized interfacial elasticity formulation for coherent and incoherent interfaces. This general formulation provides an insight on the physical significance and the obvious coupling between the interface structure and the associated mechanical fields in the vicinity of the crack tip. The singularity of the crack-tip stress field will be discussed in terms of the interface properties.

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