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Low Frequency Longitudinal Vibrations of an Elastic Bar Made of a Dynamic Material and Excited at One End

✍ Scribed by Konstantin A. Lurie

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 98 KB
Volume: 251
Category: Article
ISSN: 0022-247X
DOI: 10.1006/jmaa.2000.7054

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✦ Synopsis

The dynamic materials, particularly the spatio-temporal composites, have been investigated in a number of recent publications. In the present paper, we examine a dynamic performance of an elastic bar with material parameters specified as an activated (moving at uniform velocity V ) periodic pattern of segments occupied by ordinary materials 1 and 2, with density ρ and stiffness k specified as ρ 1 k 1 and ρ 2 k 2 , respectively. We particularly consider the low frequency wave propagation arising when the period d of the material pattern is much less than the wavelength λ of a dynamic disturbance. The bar is excited at its left end by a signal g t .

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