S Wave 6


S Wave 6 :

Elastic waves producing shear and no volume change are called S waves (S standing for Latin Secundae or “secondary”). In a homogeneous, isotropic, linear elastic medium the velocity of S waves is equal to (μ/ρ)-1/2, where μ and ρ are the rigidity and density, respectively. For a classical isotropic linear elastic media (in an isotropic far field), the particle displacement associated with S waves is perpendicular to the direction of wave propagation, so they are sometimes called “transverse waves.” See Aki and Richards (2002 or 2009, p. 122), and BenZion (2003, Eq. (1.9b)). In an isotropic full space, only S waves generate rotational motions. For isotropic Cosserat continua, S wave becomes a mixed shear-rotational wave. In anisotropic media, it couples also with P wave

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