摩擦系数对高副接触磨损影响的有限元模拟

Finite element simulation of effects of COF on wear of high pair

摘要:

为研究摩擦系数对高副接触磨损的影响,利用有限元方法,采用ANSYS软件建立了圆柱和平板相接触的磨损预测模型．根据改进的Archard磨损模型计算磨损量,采用移动接触边界节点的方法来模拟材料的去除过程,并与实验数据进行了对比,证明了模型的合理性．利用该模型,研究不同的摩擦系数对磨损量、接触压力、滑移量、正应力、剪应力的影响．仿真结果表明,较小的摩擦系数会产生较大的接触压力和滑移量,从而使磨损量增大．较大的摩擦系数会加速疲劳的产生．

Abstract:

To study the effects of COF on wear of high pair, a wear prediction model of cylinder-on-flat configuration was established with the finite element method (FEM) and the commercial FE software ANSYS. The wear volume is computed by a modified Archard equation, and the material loss caused by wear is simulated by moving contact boundary nodes in FEM model. The simulation results, which have been verified by experiments, show that the lower COF would generate the larger contact pressure and slip that produces more wear volume. The larger COF would accelerate the generation of fatigue.