Propagation of elastic waves in an infinite elastic medium containing a finite array of circular cylindrical cavities is considered. It is assumed that the cavities are equally spaced within each layer, but the cylinder radii, as well as the distance between the layers, may vary from layer to layer. Our objective is to analyze the effect of such an irregularity on scattering properties of the system. Using the method of multipole expansions we evaluate for the case of normal incidence the reflection and transmission matrices for a stack of layers, and find a range of frequencies for which polarization or complete reflection of an incident wave takes place. Presented results highlight the effect of variation in radii and distance between the layers on propagation of elastic waves in such structures.
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January 2003
Technical Papers
Transmission and Polarization of Elastic Waves in Irregular Structures
S. B. Platts,
S. B. Platts
Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, U.K.
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N. V. Movchan,
N. V. Movchan
Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, U.K.
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R. C. McPhedran,
R. C. McPhedran
School of Physics, University of Sydney, Sydney 2006, Australia
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A. B. Movchan
A. B. Movchan
Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, U.K.
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S. B. Platts
Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, U.K.
N. V. Movchan
Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, U.K.
R. C. McPhedran
School of Physics, University of Sydney, Sydney 2006, Australia
A. B. Movchan
Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, U.K.
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division October 1, 2001; revision received June 5, 2002. Associate Editor: E. Werner.
J. Eng. Mater. Technol. Jan 2003, 125(1): 2-6 (5 pages)
Published Online: December 31, 2002
Article history
Received:
October 1, 2001
Revised:
June 5, 2002
Online:
December 31, 2002
Citation
Platts , S. B., Movchan, N. V., McPhedran, R. C., and Movchan, A. B. (December 31, 2002). "Transmission and Polarization of Elastic Waves in Irregular Structures ." ASME. J. Eng. Mater. Technol. January 2003; 125(1): 2–6. https://doi.org/10.1115/1.1525248
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