Peijun Wei, and Zhuping Huang, Frequency-dependent dynamic effective properties of porous materials, J. Univ. Sci. Technol. Beijing , 12(2005), No. 3, pp.236-242.
Cite this article as: Peijun Wei, and Zhuping Huang, Frequency-dependent dynamic effective properties of porous materials, J. Univ. Sci. Technol. Beijing , 12(2005), No. 3, pp.236-242.
Materials

Frequency-dependent dynamic effective properties of porous materials

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This work was financially supported by the National Natural Science Foundation of China (No.10272003, No. 10032010, and No. 10372004) the Talent Foundation of the University of Sciences and Technology Beijing.

  • The frequency-dependent dynamic effective properties (phase velocity, attenuation and elastic modulus) of porous materials are studied numerically. The coherent plane longitudinal and shear wave equations, which are obtained by averaging on the multiple scattering fields, are used to evaluate the frequency-dependent dynamic effective properties of a porous material. It is found that the prediction of the dynamic effective properties includes the size effects of voids which are not included in most prediction of the traditional static effective properties. The prediction of the dynamic effective elastic modulus at a relatively low frequency range is compared with that of the traditional static effective elastic modulus, and the dynamic effective elastic modulus is found to be very close to the Hashin-Shtrikman upper bound.
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