Physics of Friction

采用理论、数值和实验相结合的方法，研究了界面和整体的各种摩擦现象。结果表明，原子清洁表面是最简单的摩擦系统之一，它表现出与系统结构有关的各种新现象。纳米尺度的润滑层也表现出类似的行为。众所周知，地震的规模分布呈幂函数分布。我们证明了用颗粒系统进行的模型实验在一定条件下重现了幂定律。基于唯象模型的数值模拟表明，尺寸分布依赖于系统的尺寸，并且对幂定律的偏离随着系统的增大而增大。

We have studied various frictional phenomena at interface and in bulk by theoretical, numerical and experimental technique. It turned out that atomically clean surface, which is one of the most simple frictional systems, shows various novel phenomena related to the structure of the system. Lubrication layer of nanoscale also shows similar behavior. It is well known that the size distribution of earthquake shows power law. We demonstrated that the model experiment using granular systems reproduces the power law under certain condition. The numerical simulation based on phenomenological model shows that the size distribution depends on the size of the system and the deviation from the power law grows for larger systems.