Abstract
Surface contact fatigue is one of the major failures that threaten the life of engineering components. A Macro-Micro-Fatigue approach for analyzing the effect of roughness on fatigue life in mixed elastohydrodynamic lubrication contact is developed and presented. This method involves two macro-micro approaches, a macro-micro mixed-lubrication approach for lubrication analysis and a macro-micro contact stress approach. The macro-micro approaches allow not only efficient modeling of pressure and film thickness distributions over the entire area of contact, but a detailed account of asperity interaction effects as well. A three-stage process is designed to comprise a rough-surface contact solver, a simplified mixed elastohydrodynamic lubrication solver, and a hydrostatic rough-contact stress solver. Subsurface stresses are calculated by means of the fast Fourier transform, and fatigue life is estimated using a version of the Zaretsky fatigue model. Typical point mixed-EHL contacts of rough surfaces are analyzed and results are presented on a comparative basis.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 835-844 |
| Number of pages | 10 |
| Journal | Tribology Series |
| Volume | 41 |
| DOIs | |
| State | Published - Jan 1 2003 |
Funding
The authors would like to express their sincere gratitude to the supports from US National Science Foundation and Office of Naval Research, Ford Motor Company, as well as the Co-Center for Surface Engineering and Tribology at Georgia Institute of Technology, and Northwestern University. The authors also wish to thank Dr. T. Yu for some of the mixed lubrication calculation.
ASJC Scopus subject areas
- General Engineering