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Observation of Elastic Wave Localization

Published online by Cambridge University Press:  25 February 2011

Ling Ye ,
George Cody ,
Minyao Zhou ,
Ping Sheng  and
Andrew Norris
Ling Ye
Affiliation:
Exxon Research &Engineering Co., Annandale, NJ 08801
George Cody
Affiliation:
Exxon Research &Engineering Co., Annandale, NJ 08801
Minyao Zhou
Affiliation:
Exxon Research &Engineering Co., Annandale, NJ 08801
Ping Sheng
Affiliation:
Exxon Research &Engineering Co., Annandale, NJ 08801
Andrew Norris
Affiliation:
Rutgers University, Department of Mechanical & Aerospace Engineering, Piscataway, NJ 08855
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Abstract

Spatial localization of bending waves was observed on a steel plate (72"X72"X1") decorated with lucite blocks (3.5"X3.5"X3") arranged in either a periodic or a random array. The exponential decay length of the localized modes is as short as 12 cm at 2.8 kHz, and increases with frequency as (f0 - f)-1, where f0 = 3.5 kHz is a quasi-mobility edge. The experimental data and finiteelement calculations suggest that the observed localization ofbending waves is due to the strong resonant scattering of bending waves by the shear modes of lucite/steel system. The generic nature of this localization phenomenon suggests its potential use as a attenuation mechanism for bending waves.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 253: Symposium V – Application of Multiple Scattering Theory to Materials Science , 1991 , 435
Copyright
Copyright © Materials Research Society 1992

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References

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