Modelling and analysis of bridging effect for interface cracks

Abstract eng:
The multilevel model of bridged cracks for analysis of bridging effect for interface cracks is proposed and used. It’s assumed: there are bonds of the different levels between jointed materials (the interface layer); a zone of weakened bonds in this layer is considered as an interfacial crack with distributed nonlinear spring-like bonds between the surfaces of a crack (the bridged zone); the size of the interface crack bridged zone is comparable to the whole crack size. The quantitative analysis of the bridging effect for interfacial cracks is performed accounting for the influence of the boundary conditions of structures and gradation of mechanical properties of jointed materials.

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