assessment of hydrostatic stress and thermo piezoelectricity in a laminated multilayered rotating hollow cylinder

In this paper, we built a mathematical model to study the influence of the initial stress on the propagation of waves in a hollow infinite multilayered composite cylinder. the elastic cylinder assumed to be made of inner and outer thermo piezoelectric layer bonded togeth-er with linear elastic material with voids (lemv) layer. the model described by the equa-tions of elasticity, the effect of the initial stress and the framework of linearized, three-dimensional theory of thermo elasticity. the displacement components obtained by found-ing the analytical solutions of the motion’s equations. the frequency equations that include the interaction between the composite hollow cylinders are obtained by the perfect-slip boundary conditions using the bessel function solutions. the numerical calculations car-ried out for the material pzt-5a and the computed non-dimensional frequency against various parameters are plotted as the dispersion curve by comparing lemv with carbon fiber reinforced polymer (cfrp). from the graph, it is clear that those are analyzed in the presence of hydrostatic stress is compression and tension.