A finite element model was developed to investigate the effects of a spherical debris on elastohydrodynamically lubricated rolling/sliding contacts. Three dimensional dent profiles were obtained using finite element method showing horseshoe shape material pile-up along the rolling direction. The dent profiles obtained from the finite element analysis (FEA) were compared with the experimental results. There is good qualitative agreement between FEA and experimental dent profiles. The FEA dent profiles were then used in a time dependent thermal elastohydrodynamic lubrication (EHL) point contact model to analyze the dent effects on the pressure, film thickness and temperature profiles. The presence of a dent in lubricated contacts generates high pressure spikes and increases the peak temperature. The internal stresses were calculated based on the pressure and traction data obtained from the EHL analysis. The results indicate that a dent created by a debris will cause the internal maximum Von Mises stress to occur near the surface, which contributes to surface initiated failures.
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July 1997
Research Papers
Debris Denting Effects on Elastohydrodynamic Lubricated Contacts
Gang Xu,
Gang Xu
School of Mechanical Engineering, Purdue University, West Lafayette, IN 47906
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Farshid Sadeghi,
Farshid Sadeghi
School of Mechanical Engineering, Purdue University, West Lafayette, IN 47906
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J. David Cogdell
J. David Cogdell
Mechanical/Tribochemical Sciences, The Timken Company, Canton, OH 44706
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Gang Xu
School of Mechanical Engineering, Purdue University, West Lafayette, IN 47906
Farshid Sadeghi
School of Mechanical Engineering, Purdue University, West Lafayette, IN 47906
J. David Cogdell
Mechanical/Tribochemical Sciences, The Timken Company, Canton, OH 44706
J. Tribol. Jul 1997, 119(3): 579-587 (9 pages)
Published Online: July 1, 1997
Article history
Received:
January 9, 1995
Revised:
July 20, 1995
Online:
January 24, 2008
Citation
Xu, G., Sadeghi, F., and Cogdell, J. D. (July 1, 1997). "Debris Denting Effects on Elastohydrodynamic Lubricated Contacts." ASME. J. Tribol. July 1997; 119(3): 579–587. https://doi.org/10.1115/1.2833539
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