Abstract: This paper discusses the safe landing process of a reentry capsule in detail with respect to landing attitude and rebound response. First, the discrete-element method (DEM) of the land soil and the finite-element method ...

Abstract: This paper presents a study of the angle of repose of a two-dimensional particle system under the Earth and Moon gravity fields. The particles interact with electrostatic forces in addition to friction. A two-dimensional ...

Abstract: The contact force model consisting of a linear spring dashpot with a frictional glider has been widely adapted to simulate granular flows. Real contact mechanics between two solid bodies is very complicated. Extensive ...

Abstract: Microscale parameters have significant influence on the macromechanical behaviors of brittle materials in the discrete-element method (DEM). The rational determination of microparameters is still an open problem to model ...

Abstract: By developing a hierarchical modeling method, using discrete element analysis software PFC3D, a discrete-element method (DEM) model can be built and solved more efficiently. In this method, smaller particles are used for ...

Abstract: Radar images can be employed to examine features of the ice surface and to determine ice drift. In the winter of 2012–2013, sea ice drift in the Bohai Sea was monitored using a marine radar system installed on an offshore ...