Dynamics of structural interfaces: Filtering and focussing effects for elastic waves

被引：64

作者：

Brun, M. ^{[2
,3
]}

Guenneau, S. ^{[4
]}

Movchan, A. B. ^{[4
]}

Bigoni, D. ^{[1
]}

机构：

[1] Univ Trent, Dept Mech & Struct Engn, I-38050 Trento, Italy

[2] Univ Cagliari, Dept Struct Engn, I-09123 Cagliari, Italy

[3] Ist CNR IOM, Unita SLACS, I-09123 Cagliari, Italy

[4] Univ Liverpool, Dept Math Sci, Liverpool L69 3BX, Merseyside, England

来源：

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS | 2010年 / 58卷 / 09期

基金：

英国工程与自然科学研究理事会;

关键词：

Elastic waves; Structural interfaces; Transfer matrix; Filtering by finite thickness slabs; Negative refraction; STRATIFIED MEDIA;

D O I：

10.1016/j.jmps.2010.06.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dynamics of thick interfaces separating different regions of elastic materials is investigated. The interfaces are made up of elastic layers or inertial truss structures. The study of evanescent mode propagation and transmission properties reveals that the discrete nature of structural interfaces introduces unusual filtering characteristics in the system, which cannot be obtained with multilayered interfaces. An example of metamaterial is presented, namely, a planar structural interface, which acts as a flat lens, therefore evidencing the negative refraction and focussing of elastic waves. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1212 / 1224

页数：13

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