颗粒物质表面摩擦性质研究  

Frictional Property on the Granular Materials Surface

作　　者：张忠政[1] 胡林[1] 刘艳辉[1] 曲东升[1] 李霖渊[1] 白光富[1] 汤燕[1] 

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

出　　处：《山西大学学报（自然科学版）》2008年第4期543-546,共4页Journal of Shanxi University(Natural Science Edition)

基　　金：国际合作项目(2007-400112);贵州省省长基金(2006-15);组织部高层次人才特助基金(2006008)

摘　　要：颗粒物质的摩擦性质与普通的固态物质有很大的区别.通过两颗粒层表面间的相互摩擦实验发现:(1)表面粘有固定颗粒的滑块与离散颗粒层表面发生相对运动时,最大静摩擦力随颗粒层中颗粒尺寸的增大而减小;(2)滑块受到的滑动摩擦力与颗粒层数有关,颗粒层数小于三层时,滑块受到的滑动摩擦力随颗粒层数增加而增加,当颗粒层数大于等于三层时,滑块受到的滑动摩擦力不再增加.通过拟合得到最大摩擦力F与尺寸R满足F=A+B exp(-R/C)关系.The friction characteristics of granular material are different from that of ordinary solid matter. By investigating the friction between two granular layers, we find. 1） when the cover plate on which granular is stuck slides on the discrete granular layer relatively, the maximum friction reduces with the radius of granular increasing;2） the friction exerted on the cover layer relates to the discrete granular layers. It is increase with the layer number increasing, when the number of discrete granular layer is less than three. No significant change happens to the friction, when the number of discrete granular layer is increased to three or more than three. By fitting,the relation between F and R obeys this equation F=A＋ Bexp（-R/C）.

关 键 词：颗粒物质 颗粒界面 滑动摩擦力 

分 类 号：O313.5[理学—一般力学与力学基础]