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pro vyhledávání: '"Chevoir, Francois"'
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Rheometric measurements on assemblies of wet polystyrene bead assemblies, in steady uniform quasistatic shear flow, for varying liquid content within the small saturation (pendular) range of isolated liquid bridges, are supplemented with a systematic
Externí odkaz:
http://arxiv.org/abs/1802.08172
Publikováno v:
Phys. Rev. E 92, 022201 (2015)
We simulate dense assemblies of frictional spherical grains in steady shear flow under controlled normal stress $P$ in the presence of a small amount of an interstitial liquid, which gives rise to capillary menisci, assumed isolated (pendular regime)
Externí odkaz:
http://arxiv.org/abs/1504.03922
Autor:
Fall, Abdoulaye, Ovarlez, Guillaume, Hautemayou, David, Mézière, Cédric, Roux, Jean-Noël, Chevoir, François
Granular materials do not flow homogeneously like fluids when submitted to external stress,but often form rigid regions that are separated by narrow shear bands where the material yields and flows. This shear localization impacts their apparent rheol
Externí odkaz:
http://arxiv.org/abs/1410.8672
Publikováno v:
Physical Review E 86 (2012) 011301
We report on a numerical study of the shear flow of a simple two-dimensional model of a granular material under controlled normal stress between two parallel smooth, frictional walls, moving with opposite velocities $\pm$V . Discrete simulations, whi
Externí odkaz:
http://arxiv.org/abs/1210.3329
Autor:
Roux, Jean-Noël, Chevoir, François
Publikováno v:
Mod\'elisation num\'erique discr\`ete des mat\'eriaux granulaires, Farhang Radja\"i et Fr\'ed\'eric Dubois (Ed.) (2010) 223
We review the influence of micromechanical parameters on the macroscopic mechanical behaviour of granular materials, as numerically simulated in discrete element approaches, both in quasistatic conditions an din dense flow. We insist in particular on
Externí odkaz:
http://arxiv.org/abs/1011.1087
Autor:
Moucheront, Pascal, Bertrand, François, Koval, Georg, Tocquer, Laurent, Rodts, Stéphane, Roux, Jean-Noel, Corfdir, Alain, Chevoir, François
Publikováno v:
Magnetic Resonance Imaging28:910-918, 2010
The rheology of granular materials near an interface is investigated through proton magnetic resonance imaging. A new cylinder shear apparatus has been inserted in the MRI device, which allows the control of the radial confining pressure exerted by t
Externí odkaz:
http://arxiv.org/abs/0912.4690
Autor:
Roux, Jean-Noël, Chevoir, François
Publikováno v:
Bulletin des Laboratoires des Ponts et Chauss\'ees 254 (2005) pp. 109-138
As a complementary tool to laboratory experiments, discrete numerical simulation, applied to granular materials, provides valuable information on the grain and contact scale microstructure, thereby enabling one to better understand the microscopic or
Externí odkaz:
http://arxiv.org/abs/0901.3472
Publikováno v:
Bulletin des Laboratoires des Ponts et Chauss\'ees 268-269 (2007) pp. 141-152
Disordered assemblies with maximum packing fraction are studied by discrete element numerical simulation for monodisperse or bidisperse spherical particles, the diameter ratio being set at three. A maximum packing fraction value corresponds to an equ
Externí odkaz:
http://arxiv.org/abs/0901.3481
Using discrete simulations, we investigate the behavior of a model granular material within an annular shear cell. Specifically, two-dimensional assemblies of disks are placed between two circular walls, the inner one rotating with prescribed angular
Externí odkaz:
http://arxiv.org/abs/0901.2060