Molecular dynamics simulations of sliding friction in a dense granular material
Molecular dynamics simulations of sliding friction in a dense granular material
复制标题
致密颗粒材料中滑动摩擦的分子动力学模拟
DOI：
10.1088/0965-0393/6/6/002
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
J. Hansen
中科院分区：
文献类型：
--
作者：
T. Matthey;J. Hansen
采用分子动力学模拟方法研究了致密二维颗粒材料中的摩擦问题。最初，颗粒在三角形晶格中有序排列，其中顶层感受到恒定的垂直压力和水平速度场。在低速度的材料的动态被发现的特点是雪崩型运动在短时间间隔内，随后由长时间的稳定期的内部应力积累。在低的外部压力，时间平均剪切应力被发现是几乎恒定的正常压力的低值和成比例的负载较高的压力。
Friction in a dense two-dimensional granular material is studied by molecular dynamics simulations. Initially the particles are ordered in a triangular lattice where the top layer feels a constant vertical pressure and horizontal velocity field. The dynamics of the material at low velocities is found to be characterized by avalanche-type motion during short time intervals followed by long stationary periods of internal stress buildup. At low external pressures, the time-averaged shear stress is found to be nearly constant for low values of the normal pressure and proportional to the load for higher pressures.