Elastic metamaterials for independent realization of negativity in density and stiffness

被引：84

作者：

Oh, Joo Hwan ^{[1
]}

Kwon, Young Eui ^{[2
]}

Lee, Hyung Jin ^{[3
]}

Kim, Yoon Young ^{[1
,3
]}

机构：

[1] Seoul Natl Univ, Inst Adv Machine & Design, 599 Gwanak Ro, Seoul 151744, South Korea

[2] Korea Inst Nucl Safety, 62 Gwahak Ro, Daejeon 305338, South Korea

[3] Dept Mech & Aerosp Engn, 599 Gwanak Ro, Seoul 151744, South Korea

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

新加坡国家研究基金会;

关键词：

WAVES; PHASE;

D O I：

10.1038/srep23630

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In this paper, we present the first realization of an elastic metamaterial allowing independent tuning of negative density and stiffness for elastic waves propagating along a designated direction. In electromagnetic (or acoustic) metamaterials, it is now possible to tune permittivity (bulk modulus) and permeability (density) independently. Apparently, the tuning methods seem to be directly applicable for elastic case, but no realization has yet been made due to the unique tensorial physics of elasticity that makes wave motions coupled in a peculiar way. To realize independent tunability, we developed a single-phased elastic metamaterial supported by theoretical analysis and numerical/experimental validations.

引用

页数：10

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