Variations in Contact Stress Distribution of Real Rough Surfaces During Running-In

[+] Author and Article Information
Xian Liang, Ji Kaiyuan, Ju Yongqing, Chen Darong

National Tribology Laboratory, Tsinghua University, Beijing 100084, People’s Republic of China

J. Tribol 115(4), 602-606 (Oct 01, 1993) (5 pages) doi:10.1115/1.2921682 History: Received November 12, 1991; Revised May 01, 1992; Online June 05, 2008


A numerical model for the elastic contact of three-dimensional real rough surfaces has been developed and applied to the study of the variations in contact stress distribution in running-in process. The specimens for calculation and experiment are washers with nominally flat grinding surfaces. The stresses of real contact between specimens at each stage of running-in are calculated and the contact stress distributions are given. It is shown that the contact stress distribution is in an exponential form which could be characterized by one dimensionless parameter: λ, the index of contact stress distribution. The proportion of plastic deformation β may be expressed as a function of λ. The results of the present work confirm the reasonableness of the early opinion that the running-in process can be considered as a gradual increase in the elastic component of deformation of the contact area and a decrease in the proportion of plastic deformation.

Copyright © 1993 by The American Society of Mechanical Engineers
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