边界对颗粒物质与探测棒间静摩擦力的影响  

Effect of boundary on maximum force between rod and granular

作　　者：白光富[1] 胡林[1] 张忠政[1] 曲东升[1] 汤燕[1] 吴宇[1] 

机构地区：[1]贵州大学理学院贵州省光电子技术与应用重点实验室,贵州贵阳550025

出　　处：《西安科技大学学报》2009年第2期248-252,共5页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金项目(10374021);贵州省高层次人才基金项目(20061208);贵州省省长基金项目(20061128)

摘　　要：用实验方法研究了颗粒物质与探测棒之间的最大静摩擦力。实验表明,颗粒系统中力的传递方式随探测棒与容器壁之间的距离发生变化,距离很小时棒受到的最大静摩擦力明显增大;最大静摩擦力与探测棒横截面有关。分析讨论实验结果并对实验数据进行拟合,给出与实验吻合的拟合公式。The article reports experiments which show that the maximum static friction force F on the surface of an aluminum rod inserted in the dry granular. We observe that cylinder container diameter can affect apparently the force F as it is small. The results show the key role of the force chain and the boundary condition of the container in the macroscopic properties of granular materials. We also observe that the projected area of rod also affects apparently the force F and polyfits the data.

关 键 词：颗粒物质 最大静摩擦力 边界条件 

分 类 号：O313.5[理学—一般力学与力学基础]