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Wave-canceling acoustic metarod architected with single material building blocks

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Title: Wave-canceling acoustic metarod architected with single material building blocks
Authors: Ogasawara, Akira Browse this author
Fujita, Kentaro Browse this author
Tomoda, Motonobu Browse this author →KAKEN DB
Matsuda, Osamu Browse this author →KAKEN DB
Wright, Oliver B. Browse this author →KAKEN DB
Issue Date: 15-Jun-2020
Publisher: American Institute of Physics (AIP)
Journal Title: Applied physics letters
Volume: 116
Issue: 24
Start Page: 241904
Publisher DOI: 10.1063/5.0011319
Abstract: Preventing elastic waves from traveling down thin structures is a subject of great interest from the point of view of both physics and applications. It represents a problem-mirrored by the case of light in waveguides-that has broad implications. To completely prohibit sound waves in a given frequency range in rods, for example, all axially propagating acoustic eigenmodes must exhibit strong damping. Here, we demonstrate experimentally and by simulation a metamaterial rod made from a single material that can simultaneously shut out all elastic-wave polarizations, namely longitudinal, flexural, and torsional modes, in a band in the sub-kHz range. We first bond five acrylic building blocks together to make a subwavelength resonator and then fix an array of these inside an acrylic tube to form a cylindrical metarod that inhibits sound transmission in the metamaterial bandgap frequency range. Applications include vibration control and earthquake mitigation.
Rights: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 116, 241904 (2020), and may be found at
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: WRIGHT O. B.

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