Effect of initial stresses on the surface wave propagation in highly anisotropic piezoelectric composite media
Dharmendra Kumar, Santimoy Kundu
Abstract
The present work analyses the propagation phenomenon of the Rayleigh wave in a piezoelectric-orthotropic substrate beneath a piezoelectric-orthotropic layer under the influence of initial stresses. The dispersion equations of Rayleigh wave propagation on the considered composite structure are obtained by employing suitable non-traditional boundary conditions for electrically open circuits and electrically short circuits. The data of two different PVDF materials have been considered to investigate the latent characteristics of Rayleigh wave propagation in the considered structure. Numerical calculations have been carried out to study the impact of initial stresses on the phase velocity of Rayleigh wave against wave number in all the considered directions of wave propagation for both electrical cases. A comparative study has also been carried out to unfold the impact of initial stresses in all the directions of Rayleigh wave propagation in electrical open- and short-circuit cases and manifested graphically. The obtained result is well-matched with the classical case of the Rayleigh wave for validation and is discussed as one of the problem's special cases. This study may help to improve the design of electrically generating and detecting acoustic devices.