Contact Models for Very Loose Granular Materials

One challenge of todays research on particle systems is the realistic simulation of granular materials consisting of many thousands of particles with peculiar contact interactions. In this study, molecular dynamics (MD, also called discrete element method, DEM) is introduced for the simulation of many-particle systems. A wide class of realistic contact models is presented, involving dissipation, adhesion, plastic deformation, friction, rolling- and torsion resistance.

[1]  P. Cundall,et al.  A discrete numerical model for granular assemblies , 1979 .

[2]  R. L. Braun,et al.  Viscosity, granular‐temperature, and stress calculations for shearing assemblies of inelastic, frictional disks , 1986 .

[3]  C. Thornton.  NUMERICAL SIMULATIONS OF DEVIATORIC SHEAR DEFORMATION OF GRANULAR MEDIA , 2000 .

[4]  H J Herrmann,et al.  Comparing simulation and experiment of a 2D granular Couette shear device , 2003, The European physical journal. E, Soft matter.

[5]  Arun Shukla,et al.  Contact law effects on wave propagation in particulate materials using distinct element modeling , 1993 .

[6]  Clément,et al.  Anomalous energy dissipation in molecular-dynamics simulations of grains: The "detachment" effect. , 1994, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[7]  Jürgen Tomas,et al.  Particle Adhesion Fundamentals and Bulk Powder Consolidation , 2000 .

[8]  Stefan Luding,et al.  Collisions & Contacts between Two Particles , 1998 .

[9]  G. Bartels,et al.  The effect of contact torques on porosity of cohesive powders , 2004, cond-mat/0403110.

[10]  J. Banavar,et al.  Computer Simulation of Liquids , 1988 .

[11]  D. C. Rapaport,et al.  The Art of Molecular Dynamics Simulation , 1997 .

[12]  Germany,et al.  A discrete model for long time sintering , 2002, cond-mat/0211280.

[13]  A. Shukla,et al.  Prediction of Dynamic Contact Loads in Granular Assemblies , 1991 .

[14]  Herman Ramon,et al.  Torsion of viscoelastic spheres in contact , 2005 .

[15]  H. Herrmann,et al.  Physics of dry granular media , 1998 .

[16]  Joe D. Goddard,et al.  A novel simulation method for the quasi‐static mechanics of granular assemblages , 1991 .

[17]  Clément,et al.  Onset of convection in molecular dynamics simulations of grains. , 1994, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.