Ultrasonic propagation in finite-length granular chains
File(s)
Published version
Author(s)
Type
Journal Article
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.
Date Issued
2015-11-02
Date Acceptance
2015-10-19
Citation
Ultrasonics, 2015, 69, pp.215-223
ISSN
1874-9968
Publisher
Elsevier
Start Page
215
End Page
223
Journal / Book Title
Ultrasonics
Volume
69
Copyright Statement
This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/).
(http://creativecommons.org/licenses/by/4.0/).
License URL
Subjects
Acoustics
0203 Classical Physics
0913 Mechanical Engineering
0912 Materials Engineering
Publication Status
Published