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Polymers 2018, 10(12), 1351; https://doi.org/10.3390/polym10121351

Railway Actuator Made of Magnetic Elastomers and Driven by a Magnetic Field

1
Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
2
Running Gear, Vehicle Structure Technology Division, Railway Technical Research Institute, Tokyo 185-8540, Japan
3
ALCA, Japan Science and Technology Agency, Tokyo 102-0076, Japan
4
Vehicle Noise and Vibration, Vehicle Structure Technology Division, Railway Technical Research Institute, Tokyo 185-8540, Japan
*
Author to whom correspondence should be addressed.
Received: 30 October 2018 / Revised: 30 November 2018 / Accepted: 30 November 2018 / Published: 6 December 2018
(This article belongs to the Special Issue Magnetic Field in Polymer Research)
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Abstract

We fabricated a mono-link using bimodal magnetic elastomers that demonstrate drastic changes in the elastic modulus by magnetic fields. The magnetic elastomer is bimodal consisting of large magnetic particles and nonmagnetic fine particles. The storage modulus for bimodal magnetic elastomers was altered from 2.2 × 105 to 1.7 × 106 Pa by a magnetic field of 500 mT. Compression tests up to a strain of 20% also revealed that the on-field stress for the bimodal magnetic elastomer was 1.24 times higher than the off-field stress. The bimodal magnetic elastomer was synthesized for the mono-link and was mounted on the bogie of a railway vehicle. A running test exhibited that the wheel lateral force was reduced by 20% by applying a magnetic field of 390 mT. View Full-Text
Keywords: soft material; stimuli-responsive gel; magnetic elastomer; railway vehicle soft material; stimuli-responsive gel; magnetic elastomer; railway vehicle
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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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Umehara, Y.; Yamanaga, Y.; Akama, S.; Kato, S.; Kamoshita, S.; Kawai, M.; Mitsumata, T. Railway Actuator Made of Magnetic Elastomers and Driven by a Magnetic Field. Polymers 2018, 10, 1351.

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