Rolling friction in the dynamic simulation of sandpile formation
Rolling friction in the dynamic simulation of sandpile formation
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DOI：
10.1016/s0378-4371(99)00183-1
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发表时间：
1999-07-15
影响因子：
3.3
通讯作者：
Yu, AB
中科院分区：
文献类型：
--
作者：
Zhou, YC;Wright, BD;Yu, AB
由于弹性迟滞损失或粘性耗散，球体之间的接触产生滚动阻力。这种阻力在一堆球体形成的三维动态模拟中被证明是重要的。采用滚动摩擦模型可以避免任意处理和不必要的假设，在可比条件下的模拟结果与实验结果吻合较好，验证了该模型的有效性。数值结果表明，休止角随滚动摩擦系数的增大而显著增大，随粒径的增大而减小。(C)所有Elsevier Science B.V.版权所有
The contact between spheres results in a rolling resistance due to elastic hysteresis losses or viscous dissipation. This resistance is shown to be important in the three-dimensional dynamic simulation of the formation of a heap of spheres. The implementation of a rolling friction model can avoid arbitrary treatments or unnecessary assumptions, and its validity is confirmed by the good agreement between the simulated and experimental results under comparable conditions. Numerical results suggest that the angle of repose increases significantly with the rolling friction coefficient and decreases with particle size. (C) All Elsevier Science B.V. All rights reserved.