Elastic metamaterials for independent realization of negativity in density and stiffness.

Abstract:

: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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Oh JH,Kwon YE,Lee HJ,Kim YY

doi

10.1038/srep23630

subject

Has Abstract

pub_date

2016-03-23 00:00:00

pages

23630

issn

2045-2322

pii

srep23630

journal_volume

6

pub_type

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