On the velocities of Rayleigh surface waves propagating along boundaries of generalized continua

Vladimir I. Erofeev ; Artem M. Antonov ; Alexey O. Malkhanov

Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 18 (2025) no. 2, pp. 191-198.

Résumé

It is demonstrated that mathematical models of gradient-elastic medium and reduced Cosserat medium, in contrast to the model of classical deformable solid, allow one to describe experimentally observed dispersion of Rayleigh surface wave, i.e., relationship between phase velocity of surface wave and frequency. At the same time, according to the model of gradient-elastic half-space, velocity of surface wave cannot exceed the velocity of shear wave but at certain values of frequency it can reach it. According to reduced Cosserat model, velocity of surface wave exceeds the velocity of shear wave as well as velocity of propagation of surface wave in classical half-space and gradient-elastic half-space.

Détail

Keywords: gradient-elastic half-space, reduced Cosserat model, surface wave, phase velocity, frequency.
Mots-clés : dispersion

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