Abstract
The possibility is studied of applying spring boundary conditions to describe propagation of elastic waves in layered composites with nonperfect contact of components or in the presence of groups of microdefects at the interface. Stiffnesses in spring boundary conditions are determined by crack density, the average size of microdefects, and the elastic properties of the materials surrounding them. In deriving the values of the effective stiffness parameters, the Baik-Thompson and Boström-Wickham approaches are applied, as well as the integral approach. The components of the stiffness matrices are derived from consideration of an incident, at a random angle to the interface, plane wave in the antiplane case, and at a normal angle in the plane case. The efficiency of this model and the possibility of using its results in the three-dimensional case are discussed.
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Golub, M.V. Propagation of elastic waves in layered composites with microdefect concentration zones and their simulation with spring boundary conditions. Acoust. Phys. 56, 848–855 (2010). https://doi.org/10.1134/S1063771010060084
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DOI: https://doi.org/10.1134/S1063771010060084