一种结合面法向接触刚度计算模型的构建

摘要：
为了预测2个固体粗糙表面接触时结合面的法向接触刚度，采用分水岭分割方法获得了粗糙表面三维微凸体的尺寸与空间分布；基于弹塑性接触理论推导出单对微凸体侧接触时接触载荷与接触变形的关系，并通过确定粗糙表面上每个微凸体的变形类型与接触载荷，计算了结合面的法向接触刚度.将计算结果与实验结果进行比较，验证了该方法的有效性.
关键词：
粗糙表面； 形貌； 侧接触； 法向接触刚度
中图分类号： O 343.3
文献标志码： A

A Normal Contact Stiffness Model of the Interface

In order to predict the interface normal contact stiffness between two solid rough surfaces, the topography of rough surfaces and contact mechanics of asperities were analyzed. The size and the space distribution of three dimensional asperities on the rough surface were obtained by the method of watershed segmentation. And the relationship between the contact load and the deformation of the shoulder shoulder asperity contact was developed based on the elastic plastic contact theory. Finally the interface normal contact stiffness was calculated by determining the deformation type and the contact load of each asperity on rough surfaces. The comparison between the experimental and the theoretical calculation result indicates the present model is valid.