4.7 Article

Magnetically Tunable Vibration Transmissibility for Polyurethane Magnetic Elastomers

Journal

POLYMERS
Volume 10, Issue 1, Pages -

Publisher

MDPI
DOI: 10.3390/polym10010104

Keywords

magnetic elastomer; magnetic gel; stimuli-responsive material; soft material; magnetorheological effect

Funding

  1. TAKEUCHI Scholarship Foundation [160005]
  2. UNION TOOL Foundation
  3. ADEKA Co. (Arakawa, Japan)

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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.

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