Jamming of packings of frictionless particles with and without shear  

作　　者：Wen Zheng Shiyun Zhang Ning Xu 郑文;张世允;徐宁(Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Soft Matter Chemistry of Chinese Academy of Sciences,and Department of Physics, University of Science and Technology of China)

机构地区：Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Soft Matter Chemistry of Chinese Academy of Sciences, and Department of Physics, University of Science and Technology of China, Hefei 230026, China

出　　处：《Chinese Physics B》2018年第6期315-319,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11702289,11734014,and 11574278);the Anhui Provincial Natural Science Foundation(Grant No.1708085QA07)

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.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.

关 键 词：jamming SHEAR macro-friction force network 

分 类 号：O4[理学—物理]