From the Somigliana waves to the evanescent waves

Pietro Caloi

Abstract


The Rayleigh equation has real coefficients; therefore, also the case of complex conjugated roots may be explained physically. The Author proves that the Somigliana waves may be formed for Poisson ratio values until 0.30543; for gradually less rigid media, they are missing altogether and degenerate into evanescent waves.

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DOI: https://doi.org/10.4401/ag-4652
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X