Dispersion and attenuation of elastic waves due to multiple scattering from cracks

Details Dispersion and attenuation of elastic waves due to multiple scattering from cracks Dispersion and attenuation of elastic waves due to multiple scattering from cracks

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pepi...27..100k&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 27, Issue 2, p. 100-105.

Physics

24

Scientific paper

Multiple scattering from cracks is considered in the two-dimensional plane-strain condition. It is assumed that identical cracks are distributed uniformly in space and that the effective waves propagate normal to the crack surfaces. Then, the apparent dispersion and attenuation are calculated as functions of frequency for three independent modes of wave propagation: SV, P and SH.
The calculated results show that, in each case, the attenuation coefficient Q-1 takes a peak value when the wavelength is nearly twice the crack width, while phase velocity has a maximum deviation from the intrinsic value at a frequency lower than the peak frequency for Q-1.
Permanent address: Department of Physics, Yokohama City University, Yokohama 236, Japan.

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