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Ultrasonic propagation in finite-length granular chains
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Hutchins, David A., Yang, Jia, Akanji, Omololu, Thomas, P. J. (Peter J.), Davis, Lee A. J., Freear, Steven, Harput, Sevan, Saffari, Nader and Gelat, Pierre (2016) Ultrasonic propagation in finite-length granular chains. Ultrasonics, 69 . pp. 215-223. doi:10.1016/j.ultras.2015.10.018
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Official URL: http://dx.doi.org/10.1016/j.ultras.2015.10.018
Abstract
A narrowband ultrasound source has been used to generate solitary wave impulses in finite-length chains of spheres. Once the input signal is of sufficient amplitude, both harmonics and sub-harmonics of the input frequency can be generated as non-linear normal modes of the system, allowing a train of impulses to be established from a sinusoidal input. The characteristics of the response have been studied as a function of the physical properties of the chain, the input waveform and the level of static pre-compression. The results agree with the predictions of a theoretical model, based on a set of discrete dynamic equations for the spheres for finite-length chains. Impulses are only created for very small pre-compression forces of the order of 0.01 N, where strongly non-linear behaviour is expected.
| Item Type: | Journal Article | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||||||
| Divisions: | Faculty of Science > Engineering | ||||||||||
| Library of Congress Subject Headings (LCSH): | Ultrasonic testing, Granular materials, Discrete-time systems, Nondestructive testing | ||||||||||
| Journal or Publication Title: | Ultrasonics | ||||||||||
| Publisher: | Elsevier Science BV | ||||||||||
| ISSN: | 0041-624X | ||||||||||
| Official Date: | July 2016 | ||||||||||
| Dates: |
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| Volume: | 69 | ||||||||||
| Page Range: | pp. 215-223 | ||||||||||
| DOI: | 10.1016/j.ultras.2015.10.018 | ||||||||||
| Status: | Peer Reviewed | ||||||||||
| Publication Status: | Published | ||||||||||
| Access rights to Published version: | Open Access | ||||||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||||||||
| Grant number: | EPK030159 |
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