An Inverse Approach to the Validation of Pressure Predictions in Rough Elastohydrodynamic Contacts

[+] Author and Article Information
C. J. Hooke

School of Manufacturing and Mechanical Engineering, The University of Birmingham, Edgbaston, Birmingham, B15 2TT

K. Y. Li

Department of Manufacturing Engineering and Engineering Management, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong

J. Tribol 124(1), 103-108 (Jun 26, 2001) (6 pages) doi:10.1115/1.1398287 History: Received January 30, 2001; Revised June 26, 2001
Copyright © 2002 by ASME
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Calculated pressures and clearances in a rough contact. Greenwood parameters, P=17.75,S=13.7. Hertz pressure=0.66 GPa. Slip=2(u1−u2)/(u1+u2)=1, rough surface has velocity u1: (a) Newtonian fluid; and (b) Eyring fluid, τ0=2.9 MPa.
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Original and run surfaces. The sampled region is from −0.5 to 0.5 mm with a 0.2 mm transition section outside this.
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von Mises’ stress under the surface: (a) maximum elastic stresses; (b) residual stresses; and (c) maximum combined stresses. The region shown is from −0.3 to 0.3 mm along the surface and 0.14 mm into it. The disc surface is at the front of the figure.
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Calculated maximum stresses for the original and run rough surfaces. The yield stress was obtained from a Vickers hardness test.




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