科学通报（英文版）
科學通報（英文版）
과학통보（영문판）
CHINESE SCIENCE BULLETIN
2006年
6期
646-654
,共9页
granular flow dynamics%quasi-solid-fluid phase transition%coordination number%contact duration%macro-stress
The quasi-solid-fluid phase transition of granular materials is closely related to the shear rate and solid concentration in addition to their intrinsic properties. The contact duration and the coordination number are two important temporal-spatial parameters to describe the granular interaction in phase transition. In this study, characteristics of the contact duration and the coordination number associated with the transition processes are determined using a 3D discrete element model under different shear rates and concentrations. The resulting macroscopic stress and strain-rate relations are discussed. The temporal and spatial parameters provide a linkage between the macroscopic constitutive law and inter- particle micromechanics.
