Abstract
The peculiarities of elastic wave propagation in a bilayer medium are studied theoretically and experimentally. One (isotropic) layer was an acrylic glass plate, and the other (anisotropic) was a quartz single-crystal. In experiments, the elastic waves were generated by a piezoelectric transmitter and received by a piezoelectric transducer contacting the surface of the model medium. The propagation time of a quasi-longitudinal wave was determined using high-order statistics. In the general case, the incident elastic waves are split at the interface between the layers: beams undergo double reflection and triple refraction. The measured dependences of the propagation times of quasi-longitudinal split waves on the angles of refraction are in satisfactory agreement with the calculated ones. The calculation was performed by solving the Christoffel equation with allowance for the boundary conditions.
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Original Russian Text © A.N. Nikitin, R.N. Vasin, T.I. Ivankina, A.A. Kruglov, T. Lokajicek, L.T.N. Phan, 2012, published in Kristallografiya, 2012, Vol. 57, No. 4, pp. 628–637.
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Nikitin, A.N., Vasin, R.N., Ivankina, T.I. et al. Peculiarities of quasi-longitudinal elastic wave propagation through the interface between isotropic and anisotropic media: Theoretical and experimental study. Crystallogr. Rep. 57, 560–568 (2012). https://doi.org/10.1134/S1063774512040098
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DOI: https://doi.org/10.1134/S1063774512040098