用复合振子模型计算纳米尺度滑动摩擦力的研究  

Calculating Atomic Scale Frictional Force with Composite Oscillator Model

作　　者：许中明[1] 黄平[2] 

机构地区：[1]顺德职业技术学院,顺德528300 [2]华南理工大学,广州510640

出　　处：《中国机械工程》2007年第21期2592-2596,共5页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50675068);广东省自然科学基金资助项目(04020089)

摘　　要：以光滑界面摩擦为研究对象,探讨用复合振子模型计算纳米尺度滑动摩擦力的原理和方法,推导出滑动摩擦力和摩擦因数的计算公式,并用原子力显微镜探针在硅试样和云母试样上做扫描实验进行验证。实验值与理论计算值的对比结果表明,两者所反映的规律基本一致,表明所提出的理论和方法可行。研究表明,滑动摩擦力与接触面积成线性增长关系,并随宏观振子横向刚度的增大而减小,由于可通过改变摩擦表面的几何形貌来改变宏观振子的横向刚度,因此这一结论将为摩擦控制提供一种新途径。A method to calculate interracial friction force with composite oscillator model was discussed, and the formulas used in calculation were derived. Some experiments with an atomic force microscopy were carried out to testify the method. The experimental results are in accord with the numerical analysis ones of the proposed method. This indicates the method is feasible. The research shows that the frictional force increases linearly as the contact area increases, but decreases with increase of the lateral stiffness of the macro oscillator. Therefore, it is possible to develop a new method to control friction because the lateral stiffness of the macro oscillator can be changed by modifying the geometry of the frictional surfaces.

关 键 词：界面摩擦 复合振子模型 摩擦力 摩擦控制 

分 类 号：TH117.2[机械工程—机械设计及理论]