Plane harmonic waves in piezo-thermoelastic materials

The present paper is aimed at to study the propagation of plane harmonic wa ves in homogeneous anisotropic piezo-thermoelastic materials after deriving the secular equation. It is found that four dispersive modes are possible. The low and high frequency approximations for the propagation speeds and a ttenuation coefficients have been obtained for quasi-longitudinal (QL), qua si-transverse (QT), and quasi-thermal (T-mode). The limiting cases of the f requency equation have also been discussed. The analytical results obtained have been computed numerically for cadmium selenide material (6 mm class) of hexagonal symmetry.