| Issue |
Europhys. Lett.
Volume 61, Number 2, January 2003
|
|
|---|---|---|
| Page(s) | 194 - 200 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2003-00212-8 | |
| Published online | 01 January 2003 | |
Collision process of a bead on a two-dimensional bead packing: Importance of the inter-granular contacts
Groupe Matière Condensée et Matériaux, UMR 6626, Université Rennes 1 F-35042 Rennes Cedex, France
Received:
23
May
2002
Accepted:
5
November
2002
The collision of an impacting bead on a 2D bead packing is experimentally investigated. It is found that the energy dissipated in the collision is strongly dependent on the density of inter-granular contacts in the packing. We show indeed that the energy released by the packing after the impact is increased when the density of inter-grain contacts is lowered. This increase manifests itself by means of an important augmentation of the number of grains ejected from the packing. In addition, we propose a phenomenological description of the propagation of the shock wave (induced by the impacting bead) through the packing. This description is inspired from percolation models and provides a plausible explanation for the increase of the energy released by a packing with a low density of inter-grain contacts.
PACS: 45.70.-n – Granular systems / 62.20.-x – Mechanical properties of solids / 81.05.Rm – Porous materials; granular materials
© EDP Sciences, 2003
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