2012
Contact percolation transition in athermal particulate systems
Shen T, O'Hern CS, Shattuck MD. Contact percolation transition in athermal particulate systems. Physical Review E 2012, 85: 011308. PMID: 22400566, DOI: 10.1103/physreve.85.011308.Peer-Reviewed Original ResearchConceptsBidisperse particle size distributionsPercolation transitionCompression stepParticle size distributionMechanical responseSystem-spanning clusterDisplacement fieldDilute configurationsApplied stressCooperative particle motionParticle motionIsotropic compressionPercolating networkParticulate systemsElastic energyFrictionless particlesTwo-dimensional systemsUnjammed stateSize distributionDynamical matrixJammed systemsAdjacency matrixSuccessive compressionSpatial dimensionsComputer simulations
2005
Velocity Profiles in Repulsive Athermal Systems under Shear
Xu N, O'Hern CS, Kondic L. Velocity Profiles in Repulsive Athermal Systems under Shear. Physical Review Letters 2005, 94: 016001. PMID: 15698098, DOI: 10.1103/physrevlett.94.016001.Peer-Reviewed Original ResearchVelocity profilesMean velocity profileNonlinear velocity profilesPlanar shear flowEnhanced velocity fluctuationsVelocity fluctuationsAthermal systemsShear wavesShear flowShearing wallsVelocity uUnderdamped systemUnderdamped dynamicsRandom close packingOverdamped dynamicsPacking fractionSmall dampingSpatial dimensionsCritical valueDynamics simulationsMolecular dynamics simulationsFraction phiDampingShearClose packing