Focusing guided waves using surface bonded elastic metamaterials

被引：144

作者：

Yan, Xiang ^{[1
]}

Zhu, Rui ^{[2
]}

Huang, Guoliang ^{[2
]}

Yuan, Fuh-Gwo ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA

[2] Univ Arkansas, Dept Syst Engn, Little Rock, AR 72204 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 12期

关键词：

TIME-REVERSAL MIRROR; LAMB WAVES;

D O I：

10.1063/1.4821258

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Bonding a two-dimensional planar array of small lead discs on an aluminum plate with silicone rubber is shown numerically to focus low-frequency flexural guided waves. The "effective mass density profile" of this type of elastic metamaterials (EMMs), perpendicular to wave propagation direction, is carefully tailored and designed, which allows rays of flexural A(0) mode Lamb waves to bend in succession and then focus through a 7 x 9 planar array. Numerical simulations show that Lamb waves can be focused beyond EMMs region with amplified displacement and yet largely retained narrow banded waveform, which may have potential application in structural health monitoring. (C) 2013 AIP Publishing LLC.

引用

页数：5

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