A Macro-Micro-Fatigue approach for predicting fatigue life in mixed-EHL contact

Dmitry Epstein*, Q Jane Wang, Leon M Keer, Herbert S. Cheng, Dong Zhu, Stephen Harris, Arup Gangopadhyay

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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 languageEnglish (US)
Pages (from-to)835-844
Number of pages10
JournalTribology Series
Volume41
DOIs
StatePublished - Jan 1 2003

ASJC Scopus subject areas

  • Engineering(all)

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