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Journal of Intelligent Material Systems and Structures
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Performance of MRE-based Vibration Absorbers

A. Albanese Lerner

Georgia Institute of Technology, 350159 Georgia Tech Station, Atlanta, GA 30332, USA

K.A. Cunefare

Georgia Institute of Technology, 350159 Georgia Tech Station, Atlanta, GA 30332, USA, ken.cunefare{at}me.gatech.edu

The purpose of this work is to use magnetorheological elastomers (MREs) as field-dependent springs within three vibration absorber configurations, and to determine their vibration absorption characteristics. Magnetorheological elastomers are fabricated from silicone gel and iron microparticles, and implemented as tunable springs in three vibration absorber configurations, which excited the MREs in shear, squeeze mode, and compression. Each vibration absorber configuration exploits different magneto-mechanical properties, achieving very different results. The MRE iron concentration is varied to find the largest natural frequency shift for the squeeze-mode absorber due to an applied magnetic field. Absorbers with MREs containing 35% iron by volume exhibits the largest natural frequency shift, 507%. MREs containing 35% iron are placed into shear and longitudinal mode vibration absorber devices, which exhibit 470% and 180% frequency increases, respectively.

Key Words: magnetorheological elastomer • adaptive vibration absorber • variable stiffness • controllable spring.

This version was published on May 1, 2008

Journal of Intelligent Material Systems and Structures, Vol. 19, No. 5, 551-563 (2008)
DOI: 10.1177/1045389X07077850
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