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Propagation of Acoustic Waves in Periodic and Random Two-dimensional Composite Media

Published online by Cambridge University Press:  31 January 2011

J. O. Vasseur  and
P. A. Deymier
J. O. Vasseur
Affiliation:
Equipe de Dynamique des Interfaces, Laboratoire de Dynamique et Structure des Matériaux Moléculaires, U.R.A. C.N.R.S. n° 801, U.F.R. de Physique, Université de Lille I, 59655 Villeneuve d'Ascq Cédex, France
P. A. Deymier
Affiliation:
Department of Materials Science and Engineering, University of Arizona, Tucson, Arizona 85721
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Abstract

Transmission of acoustic waves in two-dimensional composite media composed of arrays of Duralumin cylindrical inclusions embedded in a poly vinyl chloride (PVC) matrix is studied. Experimental and theoretical results for the transmission spectrum of a periodic array of cylinders organized on a square lattice are reported. Local gaps in the first two-dimensional Brillouin zone are predicted and observed. The experimental measurements of power spectra for a random array of inclusions show a weak correlation between disorder and acoustic absorptions up to a high degree of disorder. Only in the case of highly random arrangements does the transmission spectrum diverge from the one obtained with a periodic array of inclusions.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 8 , August 1997 , pp. 2207 - 2212
Copyright
Copyright © Materials Research Society 1997

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