Abstract:

The friction on interface between granular medium and general solid is an important boundary condition, which is often encountered in research of granular physics. Since the value of the friction coefficients are very different in published literatures, a specialized measurement and research is needed. In this experiment,   the coefficient of maximum static friction between the granular matter and different solid surfaces are measured, and the inferface friction follows the fricion law of da Vinci. The measured static friction coefficients of the granular-solid interfaces are about 0.17-0.20, while the value in handbook of material, for solid-solid interface of same materials is about 0.94. These results indicate that the coefficient of friction in material handbook can not be applied to the problem of granular physis directly.

Key words:  granular matter; granular interface; static friction coefficient