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Polymers 2018, 10(1), 104; https://doi.org/10.3390/polym10010104

Magnetically Tunable Vibration Transmissibility for Polyurethane Magnetic Elastomers

1
Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
2
ALCA, Japan Science and Technology Agency, Tokyo 102-0076, Japan
3
Faculty of Engineering, Niigata University, Niigata 950-2181, Japan
4
Faculty of Science and Technology, Oita University, Oita 870-1192, Japan
*
Author to whom correspondence should be addressed.
Received: 22 December 2017 / Revised: 19 January 2018 / Accepted: 19 January 2018 / Published: 22 January 2018
(This article belongs to the Special Issue Elastomers)
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Abstract

The effect of a weak magnetic field on vibration transmissibility was investigated for magnetic elastomers with various volume fractions of magnetic particles. Polyurethane elastomers without magnetic particles exhibited a natural frequency at 53 Hz and were insensitive to a magnetic field of 60 mT. The natural frequency for magnetic elastomers with a volume fraction of 0.23 was 115 Hz at 0 mT, and increased to 134 Hz at 60 mT. The vibration transmissibility was independent of the magnetic field. A linear relation between the natural frequency and (G/m)1/2 was observed (G: storage modulus, m: mass), indicating that the observed vibration is basically described by a simple harmonic oscillation. View Full-Text
Keywords: magnetic elastomer; magnetic gel; stimuli-responsive material; soft material; magnetorheological effect magnetic elastomer; magnetic gel; stimuli-responsive material; soft material; magnetorheological effect
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Endo, H.; Kato, S.; Watanebe, M.; Kikuchi, T.; Kawai, M.; Mitsumata, T. Magnetically Tunable Vibration Transmissibility for Polyurethane Magnetic Elastomers. Polymers 2018, 10, 104.

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