Solitary wave trains in granular chains: experiments, theory and simulations

The features of solitary waves observed in horizontal monodisperse chain of barely touching beads not only depend on geometrical and material properties of the beads but also on the initial perturbation provided at the edge of the chain. An impact of a large striker on a monodisperse chain, and simi...

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Bibliographic Details
Published in:Granular matter 2007-12, Vol.10 (1), p.13-20
Main Authors: Job, Stéphane, Melo, Francisco, Sokolow, Adam, Sen, Surajit
Format: Article
Language:English
Subjects:
Condensed Matter
Materials Science
Physics
Soft Condensed Matter
Waveform analysis
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Summary:The features of solitary waves observed in horizontal monodisperse chain of barely touching beads not only depend on geometrical and material properties of the beads but also on the initial perturbation provided at the edge of the chain. An impact of a large striker on a monodisperse chain, and similarly a sharp decrease of bead radius in a stepped chain, generates a solitary wave train containing many single solitary waves ordered by decreasing amplitudes. We find, by simple analytical arguments, that the unloading of compression force at the chain edge has a nearly exponential decrease. The characteristic time is mainly a function involving the grains' masses and the striker mass. Numerical calculations and experiments corroborate these findings. [PUBLICATION ABSTRACT]
ISSN:1434-5021
1434-7636
DOI:10.1007/s10035-007-0054-2