SH surface wave in piezoelec-elastic functionally graded materials

Functionally graded piezoelectric materials(FGPM) have been widely used in SAW devices in order to im-prove their efficiency and features.The research on surface wave propagation behavior becoming more and more im-portant,in this paper,the propagation behavior of SH surface waves in FGPM is studied.Based on electro-elasticity,the SH wave equation of transversely isotropy piezoelectric-piezomagnetic graded plate is obtained.The Laguerre orthogonal polynomial series expansion approach is employed to derive its solution,and the dispersion curves,displacement curves and electric potential in cases of linear,quadratic and cubic material characteristics variation are obtained.The influence of material constant gradient on the SH wave is investigated and the results have been compared with the ones early.