Magnetically Tunable Vibration Transmissibility for Polyurethane Magnetic Elastomers

Hiroyuki Endo; Shunsuke Kato; Mayuko Watanebe; Takehito Kikuchi; Mika Kawai; Tetsu Mitsumata

doi:10.3390/polym10010104

Magnetically Tunable Vibration Transmissibility for Polyurethane Magnetic Elastomers

Polymers (Basel). 2018 Jan 22;10(1):104. doi: 10.3390/polym10010104.

Authors

Hiroyuki Endo^{1

2}, Shunsuke Kato^{3

4}, Mayuko Watanebe⁵, Takehito Kikuchi⁶, Mika Kawai^{7

8}, Tetsu Mitsumata^{9

10

11}

Affiliations

¹ Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan. f16b003c@mail.cc.niigata-u.ac.jp.
² ALCA, Japan Science and Technology Agency, Tokyo 102-0076, Japan. f16b003c@mail.cc.niigata-u.ac.jp.
³ Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan. f17b009g@mail.cc.niigata-u.ac.jp.
⁴ ALCA, Japan Science and Technology Agency, Tokyo 102-0076, Japan. f17b009g@mail.cc.niigata-u.ac.jp.
⁵ Faculty of Engineering, Niigata University, Niigata 950-2181, Japan. t14s841j@mail.cc.niigata-u.ac.jp.
⁶ Faculty of Science and Technology, Oita University, Oita 870-1192, Japan. t-kikuchi@oita-u.ac.jp.
⁷ Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan. mikagoro@eng.niigata-u.ac.jp.
⁸ ALCA, Japan Science and Technology Agency, Tokyo 102-0076, Japan. mikagoro@eng.niigata-u.ac.jp.
⁹ Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan. tetsu@eng.niigata-u.ac.jp.
¹⁰ ALCA, Japan Science and Technology Agency, Tokyo 102-0076, Japan. tetsu@eng.niigata-u.ac.jp.
¹¹ Faculty of Engineering, Niigata University, Niigata 950-2181, Japan. tetsu@eng.niigata-u.ac.jp.

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.

Keywords: magnetic elastomer; magnetic gel; magnetorheological effect; soft material; stimuli-responsive material.