Materials and Nanoscience, Nebraska Center for (NCMN)


Date of this Version

February 2005


Published in L. Yang and J. A. Turner: Acoustics Research Letters Online. © 2005 Acoustical Society of America. Used by permission.


The theory of wave propagation and scattering in cracked media is applied to study the wave attenuations in an isotropic solid medium containing perfectly aligned penny-shaped microcracks. The unit normals of all cracks are assumed parallel to a given direction. The wave scattering model is formulated using an anisotropic Green’s dyadic approach. Explicit expressions are derived for attenuations of the three wave modes in terms of the microcrack density. Numerical results are presented and discussed. In particular, comparisons of the attenuation results presented in this letter with previous results for the Rayleigh limit are given.