 |
 |
|
|
| HAL: hal-00689845, version 1 |
| Detailed view |  Export this paper |
 |
| EPL 98 (2012) 4408 |
|
|
|
|
| Particle shape dependence in 2D granular media |
|
|
| Baptiste Saint-Cyr 1, 2Szarf Krzysztof 3 |
|
|
| (2012) |
|
|
|
| Particle shape is a key to the space-filling and strength properties of granular matter. We consider a shape parameter η describing the degree of distortion from a perfectly spherical shape. Encompassing most specific shape characteristics such as elongation, angularity and non- convexity, η is a low-order but generic parameter that we used in a numerical benchmark test for a systematic investigation of shape-dependence in sheared granular packings composed of particles of different shapes. We find that the shear strength is an increasing function of η with nearly the same trend for all shapes, the differences appearing thus to be of second order compared to η. We also observe a nontrivial behavior of packing fraction which, for all our simulated shapes, increases with η from the random close packing fraction for disks, reaches a peak considerably higher than that for disks, and subsequently declines as η is further increased. These findings suggest that a low-order description of particle shape accounts for the principal trends of packing fraction and shear strength. Hence, the effect of second-order shape parameters may be investigated by considering different shapes at the same level of η. |
|
|
|
|
|
|
|
|
|
|
|
| 1: | Laboratoire de mécanique et génie civil (LMGC) |
|
|
|
CNRS : UMR5508 – Université Montpellier II - Sciences et techniques |
|
|
| 2: | Laboratoire des Combustibles Uranium (LCU) |
|
|
|
CEA : DEN/DEC/SPUA/LCU |
|
|
| 3: | Laboratoire sols, solides, structures - risques (3S-R) |
|
|
|
CNRS : UMR5521 – Institut National Polytechnique de Grenoble (INPG) – Université Joseph Fourier - Grenoble I |
|
|
| 4: | Département recherche et développements (R&D - SNCF) |
|
|
|
SNCF |
|
|
| 5: | Ecole Centrale de Lyon |
|
|
|
UMR CNRS 5513 – LTDS |
|
|
| 6: | Laboratoire Sols, Solides, Structures (3S) |
|
|
|
Université Joseph Fourier - Grenoble I |
|
|
| 7: | Laboratoire de Tribologie et Dynamique des Systèmes (LTDS-ENSMSE) |
|
|
|
CNRS – Ecole Centrale de Lyon – Ecole Nationale d'Ingénieurs de Saint Etienne – École Nationale Supérieure des Mines - Saint-Étienne |
|
|
| 8: | Laboratoire de micromécanique et intégrité des structures (MIST) |
|
|
|
CNRS : UMR5508 – IRSN |
|
|
|
|
|
|
|
|
|
| Physique et Mécanique des Milieux Granulaires |
|
|
|
|
| Subject | : | Physics/Mechanics/Mechanics of materials Engineering Sciences/Mechanics/Mechanics of materials |
|
|
| granular matter – particle shape – shear strength – friction mobilization – packing fraction |
|
|
|
| Attached file list to this document: | |||||
|
|||||
|
|
|
| hal-00689845, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00689845 | |
| oai:hal.archives-ouvertes.fr:hal-00689845 | |
| From: Farhang Radjai | |
| Submitted on: Friday, 20 April 2012 12:43:40 | |
| Updated on: Saturday, 1 December 2012 01:25:18 | |
