Affiliation:
1. The Timken Company, Canton OH 44706
Abstract
A means of evaluating the surface roughness effect on contact fatigue life has been proposed. To account for stress variations caused by random surface roughness, an effective stress concept based on damage accumulation theory was employed. A point EHL analysis along with a comprehensive interior stress analysis has been performed to obtain the effective stress field under lubricated conditions. Numerical simulations were performed for surfaces produced by different finishing processes. Results show that surface roughness can cause significant stress variations in the near-surface. As a result, the effective stress at the near-surface is increased. The increased effective stress is responsible for the life reduction of the contact. Life reduction factors for contact surfaces with different finishing processes were compared.
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Reference17 articles.
1. Ai, X., 1993, “Numerical Analyses of Elastohydrodynamically Lubricated Line and Point Contacts with Rough Surfaces by using Semi-System and Multigrid Methods,” Ph. D. dissertation, Northwestern University, Evanston, IL.
2. Ai
X.
, and ChengH. S., 1994, “Influence of Moving Dent on Point EHL Contacts,” Tribology Transactions, Vol. 37, No. 2, pp. 323–335.
3. Ai, X., and Lee, S. C., 1996, “Effect of Slide-to-Roll Ratio on Interior Stresses Around a Dent in EHL Contacts,” STLE, Tribology Transaction, Preprint No. 96-AM-4J-1.
4. Chang
L.
, 1995 “Deterministic Modeling and Numerical Simulation of Lubrication Between Roughness Surfaces—A Review of Recent Developments,” Wear, Vol. 184, pp. 155–160.
5. Ioannides
E.
, and HarrisT. A., 1985, “A New Fatigue Life Model for Rolling Bearings,” ASME JOURNAL OF TRIBOLOGY, Vol. 107, No. 3, pp. 367–378.
Cited by
26 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献