冰面上橡胶滑动摩擦特性的数值分析

Study on Frictional Characteristics of Rubber Sliding on Ice

基于摩擦熔化理论,考虑流体动力润滑和热传导的耦合作用,采用打靶法和线性插值法获得了冰面上滑动橡胶块摩擦界面上的压力、流体膜厚及温度的无量纲分布规律,研究了胶块的摩擦特性。结果表明,摩擦界面上的压力峰值随载荷的减小向界面中部移动,摩擦因数与滑动速度的平方根成正比,而与载荷和试样长度的平方根成反比。所用方法可应用于其它材料在冰面上的摩擦及其它情况下的摩擦熔化问题。

Based on the theory of friction melting of ice, a coupled analysis of hydrodynamic lubrication equation and heat transfer equation for a rubber block sliding on ice was finished. The dimensionless distributions of pressure, water film thickness and temperature of rubber block interface along sliding direction were presented by using the shooting method and the linear interpolation method. The frictional characteristics of the rubber block were analyzed, the influence of ambient temperature on the friction coefficient was discussed. Results show that the dimensionless pressure peak of melting fluid shifts to the middle contact patch with normal load decreased. The sliding friction coefficient of the rubber block is proportional to the square root of sliding speed, but inverse proportional to normal load and the square of the block length. The methods used in this paper can be used for analyzing other ice friction problems concerning the materials except the rubber-like materials.