Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
권호 표지
DOI QR코드

DOI QR Code

Study on the Film Thickness and Pressure of the Transient Line Contact Elastohydrodynamic Lubrication

비정상 상태의 선접촉 탄성유체윤활 유막두께 및 유막압력 특성연구

  • Cho, Jae-Cheol (School of Mechanical and Automotive engineering, Kookmin University) ;
  • Jang, Si-Youl (School of Mechanical and Automotive engineering, Kookmin University)
  • 조재철 (국민대학교 기계자동차공학부) ;
  • 장시열 (국민대학교 기계자동차공학부)
  • Published : 2009.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

Elastohydrodynamic lubrication (EHL) analysis shows that film thickness is very flat in the contact area and pressure distribution is somehow similar to that of Hertzian contact pressure except the outlet region with pressure spike. These typical patterns of EHL film thickness and pressure are the cases under the steady contact conditions of applied loads and speeds. However, many engineering contacts are rather under the conditions of varying loads and contact speeds, and therefore the predictions for endurance life and performance of machine elements with steady EHL analysis are not suitable in many occasions. This study shows the differences in film thickness formation and pressure distribution between steady and transient contact conditions in several contact cases.

Keywords

References

  1. Houpert, L. and Hamrock, B. J., 'Fast Approach for Calculating Film Thickness and Pressures in Elastohydrodynamically Lubricated Contacts at High Loads', J of Tribology, Vol. 108, pp. 411-420, 1986 https://doi.org/10.1115/1.3261220
  2. Hamrock, B.J., et al., Fundamentals of Fluid Film Lubrication 20d ed., Markel Dekker, ISBN 0824753712, 2004
  3. Brandt, A., 'Multilevel Adaptive Solutions to Boundary Value Problems', Math. Comp., Vol. 31, pp. 333-390, 1977 https://doi.org/10.1090/S0025-5718-1977-0431719-X
  4. Dowson, D., Taylor, C. M. and Zhu, G, 'A Transient Elastohydrodynamic Lubrication Analysis of a Cam and Follower', Journal of Physics: Applied Physics, Vol. 25, pp. A-313-A320, 1992 https://doi.org/10.1088/0022-3727/25/1A/047
  5. Venner, C. H., Ten Napel, W. E. and Bosma, R., 'Advanced Multilevel Solution of the EHL Line Contact Problem', Journal of Tribology, pp. 426-432, 1990 https://doi.org/10.1115/1.2920277
  6. Lubrecht, A. A., 'The Numerical Solution of Lubricated Line and Point Contact Problem Using multigrid Techniques', Ph.D. thesis, University of Twente, 1987
  7. Ehret, P., Dowson, D., Taylor, C. M. and Wang, D.,'Analysis of Isothermal Elastohydrodynamic Point Contact Lubricated by Newtonian Fluids using Multigrid Methods', Journal of Engineering Tribology, Vol. 211, pp. 493-508 https://doi.org/10.1243/0954406971521881