REFLECTION OF PLANE WAVES IN GENERALIZED THERMOELASTIC MODEL WITH PHASE LAGS

ABSTRACT

This study examines the propagation of plane waves in a generalized thermo-viscoelastic semi-infinite material that is isotropic, homogenous and has a distribution of vacuous pores. The fundamental governing equations are based on the three-phase-lag (3PL) theory of thermoelasticity. It is discovered that the material used can support the existence of three compressional waves and a shear vertical wave (SV wave). Compressional wave reflection from the free surface of the medium is taken into consideration. The closed-form formulas for the reflection coefficients of different reflected waves have been found. The striking wave’s angle of incidence, void parameters, phase delays, and other elastic characteristics all affect the reflection coefficients. For a particular model, MATLAB software has been used to calculate the amplitude ratios of plane waves. Graphical representations of the numerical values of the modulus of reflection coefficients are provided. 

FULL TEXT