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TECHNICAL PAPERS

Analysis of EHL Circular Contact Shut Down

[+] Author and Article Information
Jiaxin Zhao, Farshid Sadeghi

School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-1288

J. Tribol 125(1), 76-90 (Dec 31, 2002) (15 pages) doi:10.1115/1.1481366 History: Received August 07, 2001; Revised March 07, 2002; Online December 31, 2002
Copyright © 2003 by ASME
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References

Figures

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Effects of initial steady state surface mean velocity in the first stage of EHL shut down: a=100 m/s2
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Effects of deceleration rate in the first stage of EHL shut down: um0=0.4 m/s
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Central and minimum film thicknesses at the end of the first stage of EHL shut down
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Effects of deceleration rate in the second stage of EHL shut down: um0=0.4 m/s
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Effects of lubricants in the second stage of EHL shut down: um0=0.4 m/s,a=100 m/s2
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Film thicknesses distribution on the symmetry line y=0 at t=0.1s with different lubricants: um0=0.4 m/s,a=100 m/s2
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Change of contact parameters in the second stage of EHL shut down: um0=0.4 m/s,a=100 m/s2
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Pressure and film thickness distributions on the symmetry line y=0 at t=0.1s:um0=0.4 m/s,a=100 m/s2
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Pressure and film thickness distributions on the symmetry line y=0 at t=0.4s:um0=0.4 m/s,a=100 m/s2
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Volume of lubricant trapped in the contact area in the second stage of EHL shut down: um0=0.4 m/s,a=100 m/s2
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Comparison with Measurements by Glovnea and Spikes: um0=0.4 m/s(η0=0.245 Pa⋅s,α=2.66×10−8 Pa−1)
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Change of contact parameters with different grid size and time step: um0=0.4 m/s,a=100 m/s2
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Pressure and film thickness distributions on the symmetry line y=0 with different grid size and time step: um0=0.4 m/s,a=100 m/s2
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Comparison of steady state results
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Pressure and film thickness of EHL shut down process: um0=0.4 m/s,a=100 m/s2 (solid line for y=0, along rolling direction; dashed line for x=0, across rolling direction)
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Change of contact parameters during EHL shut down process: um0=0.4 m/s,a=100 m/s2
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Film thickness change during the first stage of EHL shut down: um0=0.4 m/s,a=100 m/s2 (ξ=−1.1b for central film thickness, ξ=−0.8b for minimum film thickness)
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Film thickness distribution along symmetry line y=0 during the first stage of EHL shut down: um0=0.4 m/s,a=100 m/s2

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