| Sound wave propagation in weakly polydisperse granular materials. | |
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MedLine Citation:
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PMID: 18462768 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Dynamic simulations of wave propagation are performed in dense granular media with a narrow polydisperse size-distribution and a linear contact-force law. A small perturbation is created on one side of a static packing and its propagation, for both P- and S-waves, is examined. A size variation comparable to the typical contact deformation already changes sound propagation considerably. The transmission spectrum becomes discontinuous, i.e., a lower frequency band is transmitted well, while higher frequencies are not, possibly due to attenuation and scattering. This behaviour is qualitatively reproduced for (i) Hertz non-linear contacts, for (ii) frictional contacts, (iii) for a range of smaller amplitudes, or (iv) for larger systems. This proves that the observed wave propagation and dispersion behaviour is intrinsic and not just an artifact of (i) a linear model, (ii) a frictionless packing, (iii) a large amplitude non-linear wave, or (iv) a finite size effect. |
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Authors:
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O Mouraille; S Luding |
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Publication Detail:
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Type: Journal Article Date: 2008-03-21 |
Journal Detail:
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Title: Ultrasonics Volume: 48 ISSN: 1874-9968 ISO Abbreviation: Ultrasonics Publication Date: 2008 Nov |
Date Detail:
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Created Date: 2008-11-10 Completed Date: 2008-12-17 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0050452 Medline TA: Ultrasonics Country: Netherlands |
Other Details:
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Languages: eng Pagination: 498-505 Citation Subset: - |
Affiliation:
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Multi Scale Mechanics, TS, CTW, UTwente, P.O. Box 217, 7500 AE Enschede, The Netherlands. o.j.p.mouraille@utwente.nl |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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