A Normal Contact Stiffness Model of the Interface

Abstract

Abstract: 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.

Key words: rough surfaces, topography, shoulder-shoulder contact, normal contact stiffness

ZHUANG Yan, LI Bao-Tong, HONG Jun, YANG Guo-Qing, ZHU Lin-Bo, LIU Hui-Jing. A Normal Contact Stiffness Model of the Interface[J]. Journal of Shanghai Jiaotong University, 2013, 47(02): 180-186.

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