科研之友
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摘要
The analysis of surface acoustic wave propagation in finite elastic solids is of essential importance in the study of the propagation nature and practical applications, and tremendous efforts have been made lately in employing both analytical and numerical methods for accurate solutions of the phase velocity and displacements. To overcome current difficulties in the physical model and computational intensity, a two-dimensional theory similar to Mindlin and Lee plate theories has been established for the surface acoustic wave propagating in finite elastic solids. Asystematic simplification of the three-dimensional equations resulted in a two-dimensional theory with accuracy and potential to solve surface acoustic wave problems in solids in a more efficient manner. For practical applications, the presence of a thin film over the substrate is studied with the two-dimensional theory with systematic modification, and straight-crested solutions with different film thickness are obtained.
