Physics of Sliding and Friction

通过数值试验和解析计算，表明静摩擦系数与载荷不成正比，而是取决于表观接触面积。这些行为表明，阿蒙顿定律的崩溃，导致前体滑移开始的整体滑动，并与实验相一致。数值研究了被限制在基底之间的颗粒的摩擦行为。在一定条件下，滑移粒度分布服从幂律。在实验中也得到了类似的结果。数值研究了具有少量分子厚度的润滑剂分子的特殊摩擦现象。摩擦力的大小与润滑剂分子层的结构密切相关。通过真实的实验和数值实验，研究了小提琴弓弦摩擦力与发声的关系。

Based on numerical experiment and analytic calculation, we showed that the static friction coefficient is not proportional to the loading force and depends on the apparent contact area. These behaviors indicate the breakdown of the Amontons' law, result from precursor slip before the onset of bulk sliding, and is consistent with experiments. Frictional behavior of granular particles confined between substrates were investigated numerically. The slip-size distribution obeys power law under certain condition. Similar results were obtained also in experiments. The peculiar frictional phenomena of lubricant molecules with a few molecular thickness were investigated numerically. The friction has strong relation with the structure of lubricant molecule layers. By real and numerical experiments the relation between the friction of bow and string in violin and the sound was investigated.