Visco-elastic response of joints to transmission waves

Details Visco-elastic response of joints to transmission waves Visco-elastic response of joints to transmission waves

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.1143y&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 12, p. 1143-1146.

Physics

5

Elastic Waves, P Waves, Plane Waves, Plastic Flow, S Waves, Seismic Waves, Viscoelasticity, Crustal Fractures, Flat Surfaces, Frequency Ranges

Scientific paper

Experiments of wave transmission across a joint were carried out to investigate the viscoelastic response of the joint. Two models for wave transmission were examined with the experimental data. The results show that the velocity discontinuity model which includes the effect of viscosity is in better agreement with the experimental observations for both P- and S-waves under dry conditions than the displacement discontinuity model. This suggests that at the real asperity contacts, the solid material behaves viscoelastically to transmission waves in the high frequency range. A possible mechanism for the viscoelastic behavior is plastic flow at the asperities caused by high local pressure.

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