Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan.
J Phys Condens Matter. 2010 Sep 15;22(36):365104. doi: 10.1088/0953-8984/22/36/365104. Epub 2010 Aug 18.
We studied the sliding friction between an adhesive gel sheet and a glass substrate. In this system, the probability distribution of the force drop obeys a power law similar to that found in earthquakes and granular systems. We observed the motion of the slip regions at the frictional interfaces and obtained the spatial distributions of shear strain by image analysis. The frictional force evaluated by the image analysis is in good agreement with the actual force measured by a load cell. This indicates that the present method provides a powerful tool to study the spatio-temporal structure in the heterogeneous stick-slip motions in sliding friction.
我们研究了粘性凝胶片与玻璃基底之间的滑动摩擦。在这个系统中，力降的概率分布遵循类似于地震和颗粒系统中发现的幂律。我们观察了摩擦界面上的滑动区域的运动，并通过图像分析获得了剪切应变的空间分布。通过图像分析评估的摩擦力与通过负载单元测量的实际力吻合良好。这表明该方法为研究滑动摩擦中的非均匀粘滑运动的时空结构提供了有力工具。
