Polarization of plane wave propagating inside elastic hexagonal system solids

Acoustic Waves at the Interface Between Different Types of Anisotropic-Strata

“…It should be noted that the reflection and refraction coefficients are not smooth continuous at the angle of critical incidence. The polarization state of the refracted wave is also influenced by the tilting-angle and anisotropy of the refraction medium [29,31,40].…”

Anomalous Refraction of Transversely Isotropic Media with Strong Anisotropy

“…Therefore, the layered rocks are preserved as transversely isotropic with respect to its vertical axis of symmetry but macroscopically anisotropic [1][2][3][4]. Reflection and refraction of acoustic waves between adjacent rocks have profound implications in geophysics, e.g., in earthquake seismology, seismic image and analysis, and underwater acoustics [5][6][7][8][9][10][11]. The physical properties of the transversely isotropic media with a vertical axis of symmetry (VTI media), as shown in Figure 1(a), can be described by an elastic stiffness tensor [2,7,[12][13][14][15][16]…”

Anomalous incident-angle and elliptical-polarization rotation of an elastically refracted P-wave

“…In such a case, the mechanical property of a VTI medium can be described by the elastic stiffness tensor of a hexagonal crystal 3 4 5 6 7 . Based on these understandings, the influences of rock anisotropy on polarization, propagation and reflection/refraction of elastic waves have been studied and reported extensively 7 8 9 10 11 12 , e.g. the polarization direction of an elastic P-wave, which is different from propagation direction; the propagation velocity that is different from phase velocity; and the reflection/refraction coefficients, which vary with respect to the acoustic impendence and anisotropy of media.…”