Abstract
We investigate the effect of viscous dissipation on the dispersive and attenuatedcharacteristics of SH surface acoustic wave propagation in a layered piezoelectric structure,which consists of a thin functionally graded piezoelectric material (FGPM) layer bondedperfectly to an unbounded elastic substrate. The piezoelectric material is polarized inz-axis direction and the material properties change gradually along the thickness of thelayer. The solutions of the dispersion relations are obtained for electrically open or shortedconditions by means of the transfer matrix method. The effects of the gradient variation ofmaterial constants on the phase velocity and attenuation are presented and discussed indetail. The analytical method and results can be useful for the design of resonators andsensors.
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