The Normal Approach and Stick-Slip Phenomena at the Interface of Two Rough Bodies

[+] Author and Article Information
B. J. Lance, F. Sadeghi

School of Mechanical Engineering, Purdue University West Lafayette, IN 47907

J. Tribol 115(3), 445-452 (Jul 01, 1993) (8 pages) doi:10.1115/1.2921657 History: Received January 06, 1992; Revised June 01, 1992; Online June 05, 2008


A solution for the dry rolling/sliding contact of rough bodies under an applied normal load has been obtained. Both the deflection of the asperities and the bulk material are considered. The conservation of volume approach was used to model elastic-plastic deformation of the asperities. The bulk material was allowed to deform elastically. The stick-slip phenomen of the rolling contact has also been investigated, including asperity deformation and wear as a function of time. The contact width between the two rough cylinders is shown to be approximately 20 percent larger than the width predicted for smooth surfaces by the Hertz equations for the same loading conditions. Similarly, the maximum surface pressure on the bulk material decreases approximately 25 percent when rough surfaces are considered.

Copyright © 1993 by The American Society of Mechanical Engineers
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