What kind of frictional parameter should be used in the polygonal dem for the eccentric collision simulations?

被引：0

作者：

Sakaguchi, Hide ^{[1
]}

Nishiura, Daisuke ^{[1
]}

机构：

[1] Japan Agency for Marine-Earth Science and Technology, Yokohama, Kanagawa, Japan

来源：

Theoretical and Applied Mechanics Japan | 2010年 / 58卷

关键词：

Air table - Collision experiments - Contact points - Coulomb friction law - DEM Simulation - Frames per seconds - Normal forces - Static friction;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In the Discrete Element Method (=DEM), the tangential spring force has the limit according to the Coulomb friction law. And generally for the frictional parameter, the coefficient of static friction is used. However, when the normal force is impulsive, such as the case of collision, it is doubtful to use the parameter based on static friction. Especially for polygonal DEM, friction due to the rotation which is induced by the inertia couple, such as the case of eccentric collision, is very complex but not studied well. Then, we performed two dimensional eccentric collision experiments using polygon plates on a frictionless air table. Polygon motions were recorded with two different frame speed digital cameras; 1)1,000 frames per second for the overall view, and 2)125,000 frames per second for the contact point micro view. In comparison with polygonal DEM simulations, the dynamics was analyzed from the kinematics data.

引用

页码：309 / 319