Rayleigh waves in electro-magneto-thermoelastic granular orthotropic non-homogeneous medium of variable density subjected to gravity field and initial compression

A mathematical model to show the effect of various inhomogeneities on propagation of Rayleigh waves in prestressed elastic granular medium has been presented. Inhomogeneities in electro-magneto and thermal fields have been assumed to vary exponentially with depth. Lame’s potential is used to solve the problem. Some special cases have also been deduced. Dispersion curves are computed numerically and presented graphically by using MathCAD. The results indicate that on neglecting various effects of electric field, magnetic field, initial stress and gravity, the calculations agrees with classical theories.