Compressional to shear wave velocity ratio of granular rocks - Role of rough grain contacts

Details Compressional to shear wave velocity ratio of granular rocks - Role of rough grain contacts Compressional to shear wave velocity ratio of granular rocks - Role of rough grain contacts

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.1683p&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 16, Aug. 21, 1992, p. 1683-1686.

Physics

10

Compression Waves, Elastic Properties, Granular Materials, Propagation Velocity, S Waves, Sedimentary Rocks, Grain Boundaries, Poisson Ratio, Seismic Waves

Scientific paper

An attempt is made to incorporate the results of a contact theory of rough surfaces (Yoshika and Scholz, 1989), which predicts both the normal and shear stiffness constants, into a model for the elastic properties of granular media. It is shown that the elastic response of dry uncompacted granular media is controlled by the response of the rough intergrain contacts. This results in the effective Poisson's ratio being essentially independent of porosity, confining pressure, and grain mineralogy. The velocity ratio predicted by the model is in good agreement with measured values.

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