In this paper,through experiments and DEM simulations,it is found that there is a ring-shaped region named Quasi-static Region between the particles expanding outward and the particles collapsing inward during the imp...In this paper,through experiments and DEM simulations,it is found that there is a ring-shaped region named Quasi-static Region between the particles expanding outward and the particles collapsing inward during the impact process.Quasi-static Region is always generated from the impact point at the same time,and then spreads out at a uniform speed.During the propagation of Quasi-static Region,the velocity of the particles in the particle extend region varies linearly in space and time.And the change rate is only related to the properties of the particle system.The simulation results show that the particle flow in Quasi-static Region is elastic-inertial flow,while the particle flow expanding outward and collapsing inward is inertial flow.展开更多
基金This work was supported by the National Natural Science Foundation of China(grant No.12072200)the Science and Technology Commission of Shanghai Municipality(grant No.19142201500).
文摘In this paper,through experiments and DEM simulations,it is found that there is a ring-shaped region named Quasi-static Region between the particles expanding outward and the particles collapsing inward during the impact process.Quasi-static Region is always generated from the impact point at the same time,and then spreads out at a uniform speed.During the propagation of Quasi-static Region,the velocity of the particles in the particle extend region varies linearly in space and time.And the change rate is only related to the properties of the particle system.The simulation results show that the particle flow in Quasi-static Region is elastic-inertial flow,while the particle flow expanding outward and collapsing inward is inertial flow.
