Latticed pentamode acoustic cloak

被引：145

作者：

Chen, Yi ^{[1
]}

Liu, Xiaoning ^{[1
]}

Hu, Gengkai ^{[1
]}

机构：

[1] Beijing Inst Technol, Key Lab Dynam & Control Flight Vehicle, Minist Educ, Sch Aerosp Engn, Beijing 100081, Peoples R China

来源：

SCIENTIFIC REPORTS | 2015年 / 5卷

基金：

中国国家自然科学基金;

关键词：

ELASTICITY;

D O I：

10.1038/srep15745

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：

We report in this work a practical design of pentamode acoustic cloak with microstructure. The proposed cloak is assembled by pentamode lattice made of a single-phase solid material. The function of rerouting acoustic wave round an obstacle has been demonstrated numerically. It is also revealed that shear related resonance due to weak shear resistance in practical pentamode lattices punctures broadband feature predicted based on ideal pentamode cloak. As a consequence, the latticed pentamode cloak can only conceal the obstacle in segmented frequency ranges. We have also shown that the shear resonance can be largely reduced by introducing material damping, and an improved broadband performance can be achieved. These works pave the way for experimental demonstration of pentamode acoustic cloak.

引用

页数：7

共 26 条

[1] Achieving control of in-plane elastic waves [J].

Brun, M. ;

Guenneau, S. ;

Movchan, A. B. .

APPLIED PHYSICS LETTERS, 2009, 94 (06)

[2] An elasto-mechanical unfeelability cloak made of pentamode metamaterials [J].

Bueckmann, T. ;

Thiel, M. ;

Kadic, M. ;

Schittny, R. ;

Wegener, M. .

NATURE COMMUNICATIONS, 2014, 5

[3] Optimizing imperfect cloaks to perfection [J].

Cai, Liang-Wu .

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 2012, 132 (04) :2923-2931

[4] Acoustic cloaking in three dimensions using acoustic metamaterials [J].

Chen, Huanyang ;

Chan, C. T. .

APPLIED PHYSICS LETTERS, 2007, 91 (18)

[5] Resonance effects in broadband acoustic cloak with multilayered homogeneous isotropic materials [J].

Cheng, Y. ;

Liu, X. J. .

APPLIED PHYSICS LETTERS, 2008, 93 (07)

[6] One path to acoustic cloaking [J].

Cummer, Steven A. ;

Schurig, David .

NEW JOURNAL OF PHYSICS, 2007, 9

[7] Special transformations for pentamode acoustic cloaking [J].

Gokhale, Nachiket H. ;

Cipolla, Jeffrey L. ;

Norris, Andrew N. .

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 2012, 132 (04) :2932-2941

[8] Approximate method for controlling solid elastic waves by transformation media [J].

Hu, Jin ;

Chang, Zheng ;

Hu, Gengkai .

PHYSICAL REVIEW B, 2011, 84 (20)

[9] On anisotropic versions of three-dimensional pentamode metamaterials [J].

Kadic, Muamer ;

Bueckmann, Tiemo ;

Schittny, Robert ;

Wegener, Martin .

NEW JOURNAL OF PHYSICS, 2013, 15

[10] On the practicability of pentamode mechanical metamaterials [J].

Kadic, Muamer ;

Bueckmann, Tiemo ;

Stenger, Nicolas ;

Thiel, Michael ;

Wegener, Martin .

APPLIED PHYSICS LETTERS, 2012, 100 (19)

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