Acoustic Properties of Magnetorheological Fluids under Magnetic Fields

Min Shen; Qi Bai Huang

doi:10.4028/www.scientific.net/AMM.721.818

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 721Acoustic Properties of Magnetorheological Fluids...

Acoustic Properties of Magnetorheological Fluids under Magnetic Fields

Abstract:

Magneto-Rheological fluid (MRF) is a class of smart material who’s mechanical and rheological properties can be varied rapidly and reversibly by the applied magnetic field. MRF also exhibit fast, strong and reversible changes in the acoustic properties. The goal of this paper is to study the acoustic attenuation and velocity variation of the MRF composite under magnetic field. The model of acoustic wave propagation in MRF was established by Biot-Stoll theory. Some minor changes to the theory had to be applied, modeling both fluid-like and solid-like state of an MRF. The calculated results show that the attenuation coefficient of acoustic wave is improved obviously under the application of magnetic field in wide range frequency.

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Periodical:

Applied Mechanics and Materials (Volume 721)

Pages:

818-823

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.721.818

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Online since:

December 2014

Authors:

Min Shen, Qi Bai Huang*

Keywords:

Attenuation Coefficient, Biot-Stoll Model, Magnetroheological Fluids, Phase Velocity

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