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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 217-219Propagation Characteristic in 2D Phononic Crystals...

Propagation Characteristic in 2D Phononic Crystals with Bending Linear Defect

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Abstract:

The band gap of 2D perfect and defect phononic crystal are calculated by using plane-wave expansion (PWE) and supercell plane wave method, which is consist of Al2O3 embedded in the epoxy resin with a square arrangement. Compared to the perfect, the gap of defect will become wider. As the size of defect length ld varied, the band structure changed. It is found that the acoustic wave only propagates along the path of defect when the propagation of acoustic wave is simulated on the 900 bending defect phononic crystals by matlab. It means that the waves are localized. So the defect mode of phononic crystal can be used as acoustic waveguide along the specific path.

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Periodical:

Applied Mechanics and Materials (Volumes 217-219)

Pages:

2566-2570

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.217-219.2566

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Cite this paper

Online since:

November 2012

Authors:

Guang Hui Fan, De Xun Zhao, Jiao He, Ying Kai Liu

Keywords:

Bandgap, Defect Mode, Phononic Crystal, Waveguide

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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