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Analysis of solitary wave impulses in granular chains using ultrasonic excitation

Yang, J; Hutchins, DA; Akanji, O; Thomas, PJ; Davis, LAJ; Harput, S; Gelat, P; ... Saffari, N; + view all (2016) Analysis of solitary wave impulses in granular chains using ultrasonic excitation. Physical Review E , 93 (6) , Article 063002. 10.1103/PhysRevE.93.063002. Green open access

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Abstract

The propagation of broad bandwidth solitary wave impulses, generated within granular chains by narrow bandwidth ultrasonic excitation, is studied in detail. Theoretical predictions are compared to experimental results. It is demonstrated that the observed effects result from a sum of a solitary wave traveling out from the source with a wave that reflects from the far end of the chain. It is shown that this combination, when used with an excitation in the form of a long-duration tone burst, encourages the generation of multiple impulses with a characteristic periodicity. This study shows that the properties of the chain structure and the excitation can be adjusted so as to generate ultrasonic solitary wave impulses with a high amplitude and known frequency content, which are of interest in applications such as biomedical ultrasound.

Type: Article
Title: Analysis of solitary wave impulses in granular chains using ultrasonic excitation
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevE.93.063002
Publisher version: http://dx.doi.org/10.1103/PhysRevE.93.063002
Language: English
Additional information: This article is available under the terms of the Creative Commons Attribution 3.0 License (http://creativecommons.org/licenses/by/3.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Keywords: science & technology, physical sciences, physics, fluids & plasmas, physics, mathematical, physics, Hertz contact, spheres, beads
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Surgical Biotechnology
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1508929
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