An efficient and accurate calculation of traction in elastohydrodynamic contacts

Rajiv Dama, L. Chang

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Traction calculation is an important step in the design and lubrication optimization of machine components with elastohydrodynamic (EHD) contacts. The availability of an accurate and robust method of calculation can be a valuable tool for the machine designer. This paper presents a method of traction calculation that combines the key features of the full numerical approach and previously reported approximation methods. Specifically, the contact pressure and the film thickness are approximated by closed-form expressions while the temperature distribution is numerically calculated using a finite difference method. This scheme of calculation largely eliminates the numerical instability problem that frequently occurs in the full numerical approach while yielding results much more accurate than those obtained by previous approximation methods. The method is robust and allows the use of any rheological models for the lubricant. It is relatively easy to implement on a computer to efficiently calculate traction in both line and point EHD contacts.

Original languageEnglish (US)
Pages (from-to)113-121
Number of pages9
Issue number1-2
StatePublished - May 1 1997

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


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