Dynamic response of Love waves in visco-porous piezoelectric composite due to the influence of an impulsive point source

Abstract Impulsive point sources are one of the external forces which can create a wave motion in the body. This article investigates the propagation characteristics of Love waves in a visco-porous piezoelectric (VPPE) material layered over a functionally graded piezoelectric (FGPE) substrate, with a point source applied at the interface. Green’s function approach and the Fourier transform are used to derive an analytical solution, of which the real part yields the frequency curve and the imaginary part yields the attenuation curve. Some particular cases are derived and compared with the existing studies for validation. Numerical illustrations are provided, showing the variation of phase velocity and attenuation with respect to different parameters, using lithium niobate as the substrate and PZT-5A as the visco-porous piezoelectric material. The findings of the study will be useful in the development and enhancement of surface acoustic wave devices.