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Viscoelastic Properties of Magnetorheological Elastomers for Damping Applications
Author(s) -
Molchanov Vyacheslav S.,
Stepanov Gennady V.,
Vasiliev Viktor G.,
Kramarenko Elena Yu.,
Khokhlov Alexei R.,
Xu ZhaoDong,
Guo YingQing
Publication year - 2014
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201300458
Subject(s) - materials science , viscoelasticity , rheometer , magnetorheological fluid , composite material , magnetorheological elastomer , elastomer , dynamic mechanical analysis , dynamic modulus , shear modulus , carbonyl iron , magnetic field , shear stress , rheology , polymer , physics , quantum mechanics
Magnetorheological elastomers (MRE) have been synthesized on the basis of a silicon compound and a mixture of carbonyl iron particles of sizes 3–5 and 40–80 μm. Their viscoelastic properties have been studied by dynamic shear oscillations of various amplitudes on a stress controlled rheometer. The magnetic response of the obtained materials has been examined in a magnetic field applied perpendicular to the shear plane. It has been shown that under applied magnetic field both the storage G ′ and loss G ″ moduli became strain‐dependent. The values of G ′ and G ″ decrease with strain, while their ratio (the loss factor), G ″/ G ′, growths with strain. The higher magnetic field is the more pronounced the strain dependence is. At small strain (up to 1%) MRE demonstrate a giant (more than 10 times) increase of the moduli. Some features of hysteretic behavior of MRE under simultaneously applied magnetic field and external mechanical force have been elucidated. Temperature has a negligible effect on viscoelastic properties and stability of the developed MRE. A damper on the basis of MRE has been designed and its properties have been examined.