Abstract
In various fields of engineering, it is important to clarify friction-induced vibration, such as stick-slip motion, for a wide range of scales from microscopic elements to continental plates. In particular, it has been known that stick-slip tends to appear at high contact loads and low driving speeds. However, the mechanism of stick-skip remains to be elucidated. In addition, significant problem of the conventional Discrete Element Method (DEM) model can not describe a transition from slip to stick state. In the case of conventional friction model in DEM, the body will be sliding even though friction state is stick. In this study, the stick-slip friction model is proposed and implemented into the conventional DEM model. Furthermore, in order to verify the validity of stick-slip friction model, the behaviors of stick-slip motions were examined through experiments and simulations performed by modified DEM.
