Date of Award
Maev, R. Gr.,
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This thesis describes the changes in the reflected and transmitted acoustic waves due to the addition of a thin layer (thickness much less than an acoustic wavelength) between two half-spaces of material. The restriction of the thin layer allows one to combine perturbation methods with the standard fully bonded boundary conditions at each interface and derive a set of equations where one no longer is concerned with the acoustic waves internal to the thin layer. This approach allows one to further examine the cases of a nonlinear thin layer, an anisotropic thin layer, and a thin layer with combined anisotropy and nonlinearity. A simulation is created to explore the various combinations of materials for the half-spaces and thin layers. In the simulation it is found that the case of half-spaces made with identical materials presents the most accurate results, and creates significant changes in the reflected and transmitted acoustic waves. The addition of anisotropy and nonlinearity also creates significant changes in certain acoustic polarizations. Finally, a qualitative experimental verification is attempted for the specific case of two identical half-spaces using a common adhesive, and anisotropic material for the thin layer. The experiment is found to yield qualitatively similar results to what is predicted by the simulation.Dept. of Physics. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2003 .S23. Source: Masters Abstracts International, Volume: 42-03, page: 0950. Adviser: R. Gr. Maev. Thesis (M.Sc.)--University of Windsor (Canada), 2003.
Sadler, Jeffrey., "Ultrasonic propagation across a thin layer between two bulk media: Theory, computer simulation and experiment." (2003). Electronic Theses and Dissertations. 4450.