Jamming of packings of frictionless particles with and without shear

摘要

By minimizing the enthalpy of packings of frictionless particles,we obtain jammed solids at desired pressures and hence investigate the jamming transition with and without shear.Typical scaling relations of the jamming transition are recovered in both cases.In contrast to systems without shear,shear-driven jamming transition occurs at a higher packing fraction and the jammed solids are more rigid with an anisotropic force network.Furthermore,by introducing the macrofriction coefficient,we propose an explanation of the packing fraction gap between sheared and non-sheared systems at fixed pressure.