Abstract
In this paper, the propagation behavior of Love waves in a smart functionally gradedpiezoelectric structure is analyzed. The smart structure consists of three layers, in whichthe piezoelectric plate serves as the upper layer accompanied by a sandwiched graded layerand a metal substrate. In the graded layer, all the parameters and the elastic modulus arerespectively assumed to vary after two mathematical forms, i.e. an exponential functionand a linear function. The WKB method is adopted to analytically solve thepropagation problem of Love waves for both electrical open and short cases on the freesurface, respectively. The phase velocity curves demonstrate that the numberof modes is greater than in the non-graded layer structure. Furthermore, theinfluence of graded variation on coupled electromechanical factor is presented.
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