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Ultrasonic propagation in finite-length granular chains
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Hutchins, David A., Yang, Jia (Researcher in engineering), 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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