64 citations · 203 across the 7 of their papers we have counts for
7 papers
Microscopic origin of granular ratcheting
S. McNamara, R. García-Rojo, H. J. Herrmann
Numerical simulations of assemblies of grains under cyclic loading exhibit ``granular ratcheting'': a small net deformation occurs with each cycle, leading to a linear accumulation…
Symmetry breaking and clustering in a vibrated granular gas with several macroscopically connected compartments
J. Javier Brey, R. Garcia-Rojo, F. Moreno +1
The spontaneous symmetry breaking in a vibro-fluidized low-density granular gas in three connected compartments is investigated. When the total number of particles in the system be…
Influence of particle shape on sheared dense granular media
A. A. Peña, R. García-Rojo, H. J. Herrmann
We study by means of molecular dynamics simulations of periodic shear cells, the influence of particle shape on the global mechanical behavior of dense granular media. Results at m…
Transport coefficients for dense hard-disk systems
Ramón García-Rojo, Stefan Luding, J. Javier Brey
A study of the transport coefficients of a system of elastic hard disks, based on the use of Helfand-Einstein expressions is reported. The self-diffusion, the viscosity, and the he…
Characterization of the material response in the granular ratcheting
R. García-Rojo, F. Alonso-Marroquín, H. J. Herrmann
The existence of a very special ratcheting regime has recently been reported in a granular packing subjected to cyclic loading \cite{alonso04}. In this state, the system accumulate…
Indeterminacy, Memory, and Motion in a Simple Granular Packing
S. McNamara, R. Rojo-Garcia, H. J. Herrmann
We apply two theoretical and two numerical methods to the problem of a disk placed in a groove and subjected to gravity and a torque. Methods assuming rigid particles are indetermi…