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TECHNICAL PAPERS

Control of Wave Propagation in Periodic Composite Rods Using Shape Memory Inserts

[+] Author and Article Information
M. Ruzzene

Mechanical Engineering Department, Catholic University of America, Washington, DC 20064

A. Baz

Mechanical Engineering Department, University of Maryland, College Park, MD 20742

J. Vib. Acoust 122(2), 151-159 (Jun 01, 1999) (9 pages) doi:10.1115/1.568452 History: Received June 01, 1999
Copyright © 2000 by ASME
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References

Figures

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Periodic structures with impedance mismatch zones
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Schematic drawing of the composite rod
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Comparison of the dispersion curves for a homogeneous rod (- -) and for a composite rod (–): real part (a) and imaginary part (b) of the effective wave number μ
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Effect of frequency and relative layer thickness λ on stop and pass-bands (ζ=2 (a) and ζ=4 (b))
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Effect of frequency and relative layer impedance ζ on stop and pass-bands (λ=2 (a) and λ=4 (b))
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Dispersion curves for aluminum composite: unactivated inserts (- -) and activated inserts (–); real part (a) and imaginary part (b)
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Dispersion curves for molded plastic composite: unactivated insert (- -) and activated inserts (–); real part (a) and imaginary part (b)
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Dispersion curves for steel composite: unactivated inserts (- -) and activated inserts (–); real part (a) and imaginary part (b)
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Expansion of the stop-bands in the aluminum composite: frequency versus relative layer thickness λ (unactivated ζ=0.99 (a) and activated ζ=0.61 (b))
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Expansion of the stop-bands in the molded plastic composite: frequency versus relative layer thickness λ (unactivated ζ=0.18 (a) and activated ζ=0.11 (b))
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Contraction of the stop-bands in the steel composite: frequency versus relative layer thickness λ (unactivated ζ=2.90 (a) and activated ζ=1.77 (b))
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Attenuation parameter as a function of the relative thickness λ for the aluminum composite (unactivated (- -) and activated inserts (–))
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Attenuation parameter as a function of the relative thickness λ for the molded plastic composite (unactivated (- -) and activated inserts (–))
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Attenuation parameter as a function of the relative thickness λ for the steel composite (unactivated (- -) and activated inserts (–))
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Effect of temperature on Young’s modulus of SMA inserts 17

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