![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Abstract
When a conformal interface is under low velocity and heavy load conditions, solid contact (or dry contact) may occur even in a system with smooth surfaces. This paper presents two approaches for solving steady-state and transient mixed elastohydrodynamic lubrication problems of journal bearings with smooth surfaces under low rotating speed. The first approach uses the reduced Reynolds equation with a combined finite element–backward finite difference scheme and the second applies a zero film thickness equation to describe the mechanical behavior of mating surfaces at solid contact points. The major advantages of these two approaches are (1) no division of the solution domain into a lubricated area and a solid contact area is necessary and (2) the solid contact pressure, lubricant pressure, and eccentricity ratio can be solved simultaneously. Numerical examples are presented for the application of these approaches. For the steady-state cases under low velocity studied in this work, pressure distributions approach those found in a dry contact state. This comparison confirms that the contact treatments are proper. Moreover, a transient case under sinusoidal loading was analyzed with these two approaches, and the results showed good agreement. This comparison further supports the use of these approaches.
Presented at the STLE Annual Meeting in Las Vegas, Nevada May 15-19, 2005
Review led by Alan Lebeck
ACKNOWLEDGEMENTS
The authors would like to acknowledge the financial support from the Federal Mogul Corporation, the Eaton Corporation, and the Baker Hughes Company through the Center for Surface Engineering and Tribology at the Georgia Institute of Technology and Northwestern University. Q. Jane Wang, Wing Kam Liu, and Shangwu Xiong would also like to thank NSF and ONR for research support.
Notes
Presented at the STLE Annual Meeting in Las Vegas, Nevada May 15-19, 2005
Review led by Alan Lebeck
