Wave propagation characterization and design of two-dimensional elastic chiral metacomposite

In this work, a chiral metacomposite is proposed by integrating two-dimensional periodic chiral lattice with elastic metamaterial inclusions for low-frequency wave applications. The plane harmonic wave propagation in the proposed metacomposite is investigated through the finite element technique and...

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Bibliographic Details
Published inJournal of sound and vibration Vol. 330; no. 11; pp. 2536 - 2553
Main Authors Liu, X.N., Hu, G.K., Sun, C.T., Huang, G.L.
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 23.05.2011
Elsevier
Subjects
Density
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Inclusions
Indexing in process
Lattices
Mathematical analysis
Mathematical models
Metamaterials
Physics
Solid mechanics
Structural and continuum mechanics
Two dimensional
Vibration
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
Wave propagation
Elastic constant
Cell structure
Bloch wave
Deformation modulus
Low frequency
Porous material
Modeling
Tuning
Finite element method
Energy gap
Group velocity
Wide band
Chiral medium
Plane wave
Vibration control
Passband
Microstructure
Effective medium model
Metamaterial
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Summary:In this work, a chiral metacomposite is proposed by integrating two-dimensional periodic chiral lattice with elastic metamaterial inclusions for low-frequency wave applications. The plane harmonic wave propagation in the proposed metacomposite is investigated through the finite element technique and Bloch's theorem. Band diagrams are obtained to illustrate wave properties of the chiral metacomposite. Effective dynamic properties of the chiral metacomposite are numerically calculated to explain low-frequency bandgap behavior in the chiral metacomposite. Interestingly doubly negative effective density and modulus of the chiral metacomposite are found in a specific frequency range, where a pass band with negative group velocity is observed. Tuning of the resulting low-frequency bandgaps is then discussed by adjusting microstructure parameters of the metamaterial inclusion and lattice geometry. Specifically design of a metacomposite beam structure for the broadband low-frequency vibration suppression is demonstrated.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0022-460X
1095-8568
DOI:10.1016/j.jsv.2010.12.014