Modulus-tunable magnetorheological elastomer microcantilevers

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Modulus-tunable microcantilevers are fabricated from magnetorheological elastomers (MREs) consisting of polydimethylsiloxane and carbonyl iron particles by using a simple sandwich molding method. Depending on the presence or absence of an external magnetic field during curing, isotropic or anisotropic MRE cantilevers are obtained. Randomly distributed particles are present in the polymer matrix of the isotropic microcantilevers, whereas the particles in the anisotropic microcantilevers are aligned in the direction of the magnetic field. The fractional changes in the resonance frequencies of the MRE cantilevers are measured as functions of the magnetic field intensity and the quantity of particles in the matrix. The anisotropic microcantilevers undergo greater changes in frequency than the isotropic microcantilevers when exposed to external magnetic fields, which indicates that larger changes in modulus are induced in the anisotropic microcantilevers. In addition, the dissipation and damping ratios of the MRE microcantilevers are determined by fitting the exponential decays of their deflection amplitudes with time.
Publisher
IOP PUBLISHING LTD
Issue Date
2014-05
Language
English
Article Type
Article
Keywords

VISCOELASTIC PROPERTIES; SANDWICH BEAMS; BEHAVIOR; CANTILEVERS; FABRICATION; MODEL

Citation

SMART MATERIALS AND STRUCTURES, v.23, no.5

ISSN
0964-1726
DOI
10.1088/0964-1726/23/5/055017
URI
http://hdl.handle.net/10203/245464
Appears in Collection
ME-Journal Papers(저널논문)
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