不同形状的棒在颗粒物质中受到的静摩擦力  

Static friction on different shape rod immersed in granular matter

作　　者：孔维姝[1] 胡林[1] 武玉琴[1] 张兴刚[1] 

机构地区：[1]贵州大学理学院光信息与物理省级重点实验室,贵州贵阳550025

出　　处：《物理实验》2006年第2期18-21,29,共5页Physics Experimentation

摘　　要：通过实验对横截面周长相同、形状不同的棒在颗粒物质中受到的最大静摩擦力进行了研究.实验结果表明:相同条件下,圆棒、方棒和扁棒受到的最大静摩擦力各不相同.用水平面上颗粒分层、对称分布模型对实验结果进行了定量分析.The maximum static friction on the same cross sectional area and different shape rod immersed in the granular matter is studied experimentally. It is demonstrated that the static friction of the circle, square and flat rods are different in the same conditions. A model constituting of layers of granular matter which are symmetrically distributed is employed to analyze the experimental results qualitatively.

关 键 词：颗粒物质 摩擦力 应力曲线 对称分布模型 

分 类 号：O312[理学—一般力学与力学基础]