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Two-dimensional acoustic cloaks of arbitrary shape with layered structure based on transformation acoustics

Li, Q and Vipperman, JS (2014) Two-dimensional acoustic cloaks of arbitrary shape with layered structure based on transformation acoustics. Applied Physics Letters, 105 (10). ISSN 0003-6951

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Abstract

© 2014 AIP Publishing LLC. Acoustic metamaterials have attracted much attention in recent years. Acoustic cloaks, which make objects invisible to acoustic waves, are the most common use for acoustic metamaterials. In this paper, acoustic cloaks with arbitrary shapes are presented based on transformation acoustics. This method interprets the compression and dilation of space as appropriate properties of materials. The derived properties of the cloak with irregular shapes are highly inhomogeneous and anisotropic, much more complex than the annulus cloaks. The materials for this kind of cloak are impossible to find in nature, and difficult to fabricate with artificial materials. In order to overcome this difficulty, layered structure with isotropic materials is adopted to approximate the required properties of the cloak. Numerical simulations of cloaks of arbitrary shape are performed to validate the design.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Li, Q
Vipperman, JSjsv@pitt.eduJSV0000-0001-5585-954X
Date: 8 September 2014
Date Type: Publication
Journal or Publication Title: Applied Physics Letters
Volume: 105
Number: 10
DOI or Unique Handle: 10.1063/1.4895765
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Refereed: No
ISSN: 0003-6951
Date Deposited: 10 Oct 2018 13:48
Last Modified: 10 Oct 2018 13:48
URI: http://d-scholarship.pitt.edu/id/eprint/35384

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