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Keywords: film thickness
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Journal Articles
Article Type: Research Papers
J. Tribol. June 2021, 143(6): 061801.
Paper No: TRIB-20-1301
Published Online: October 13, 2020
...J. C. Atwal; R. K. Pandey This paper presents the performance behaviors (coefficient of friction, minimum film thickness, and pressure distributions) of a fluid film thrust bearing using a newly conceived micro-texture on pads. In the numerical investigation, the Reynolds equation has been...
Journal Articles
Article Type: Research Papers
J. Tribol. February 2021, 143(2): 021801.
Paper No: TRIB-20-1156
Published Online: August 3, 2020
...Quentin Allen; Bart Raeymaekers Polyethylene wear debris limits the longevity of prosthetic hip implants. We design a pattern of axisymmetric texture features to increase hydrodynamic pressure and lubricant film thickness and, thus, reduce solid-on-solid contact, friction, and wear in hard-on-soft...
Journal Articles
Article Type: Research Papers
J. Tribol. July 2020, 142(7): 071802.
Paper No: TRIB-19-1493
Published Online: March 11, 2020
...Quentin Allen; Bart Raeymaekers We design a pattern of microtexture features to increase hydrodynamic pressure and lubricant film thickness in a hard-on-soft bearing. We use a soft elastohydrodynamic lubrication model to evaluate the effect of microtexture design parameters and bearing operating...
Journal Articles
Article Type: Research-Article
J. Tribol. March 2019, 141(3): 031501.
Paper No: TRIB-18-1203
Published Online: November 1, 2018
...), calcium carbonate (CaCO 3 ), and alumina ( α -Al 2 O 3 ) in bare grease (BG). The formulated nanocomposite greases are tested for film formation, frictional and vibrational response under a limited supply of greases. The use of transparent glass disk better analyses the profile of film thickness...
Journal Articles
Article Type: Elastohydrodynamic Lubrication
J. Tribol. January 2012, 134(1): 011503.
Published Online: February 24, 2012
...M. Masjedi; M. M. Khonsari Three formulas are derived for predicting the central and the minimum film thickness as well as the asperity load ratio in line-contact EHL with provision for surface roughness. These expressions are based on the simultaneous solution to the modified Reynolds equation...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2010, 132(2): 021501.
Published Online: March 24, 2010
...H. Dormois; N. Fillot; W. Habchi; G. Dalmaz; P. Vergne; G. E. Morales-Espejel; E. Ioannides This paper presents a study of the spinning influence on film thickness and friction in EHL circular contacts under isothermal and fully flooded conditions. Pressure and film thickness profiles are computed...
Journal Articles
Article Type: Research Papers
J. Tribol. October 2008, 130(4): 041504.
Published Online: August 5, 2008
...Ilya I. Kudish; P. Kumar; M. M. Khonsari; Scott Bair The estimation or prediction of elastohydrodynamic lubrication (EHL) film thickness requires knowledge of the lubricant properties. Today, in many instances, the lubricant properties have been obtained from a measurement of the central film...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2008, 130(2): 021503.
Published Online: April 7, 2008
... stress are calculated, and lubricant film thickness is obtained using the load-sharing concept of Johnson et al. (1972, “A Simple Theory of Asperity Contact in Elastohydrodynamic Lubrication,” Wear, 19, pp. 91–108) To validate the analysis, the predicted film thickness and the friction coefficient...
Journal Articles
Article Type: Research Papers
J. Tribol. April 2008, 130(2): 021502.
Published Online: March 20, 2008
... polymer additives are often added to the base oil. This paper investigates the effect of mixture rheology on elastohydrodynamic lubrication (EHL) film thickness using EHL contact measurements and a full numerical analysis for three synthetic lubricants including two single-component lubricants PAO650...
Journal Articles
Article Type: Technical Papers
J. Tribol. July 2007, 129(3): 502–508.
Published Online: February 9, 2007
... about film thickness changes within a lubricated contact. The behavior of microdents has been observed for positive slide-to-roll ratios when the disk is moving faster than the microtextured ball. The depth of microdents has been found to play significant role as to the lubrication films efficiency...
Journal Articles
Article Type: Technical Papers
J. Tribol. January 2007, 129(1): 181–187.
Published Online: October 25, 2006
...I. C. Faraon; D. J. Schipper This paper discusses a mixed lubrication model in order to predict the Stribeck curve for starved lubricated line contacts. This model is based on a combination of the contact model of Greenwood and Williamson and the elastohydrodynamic (EHL) film thickness for starved...
Journal Articles
Article Type: Research Papers
J. Tribol. July 2006, 128(3): 624–631.
Published Online: March 3, 2006
...Scott Bair; Yuchuan Liu; Q. Jane Wang There has been a long-standing need for a piezoviscous parameter α film that, together with the ambient viscosity μ 0 , will completely quantify the Newtonian rheology so that the film thickness for liquids that do not shear-thin in the inlet may be calculated...
Journal Articles
Article Type: Technical Papers
J. Tribol. April 2001, 123(2): 254–261.
Published Online: February 11, 2000
... in lubricant film thickness and shape during fast, controlled deceleration, both in pure sliding and pure rolling conditions. Film collapse is seen to occur in two stages. The first persists throughout the deceleration period and, during this stage the film geometry remains almost constant across the contact...
Journal Articles
Article Type: Technical Papers
J. Tribol. April 2001, 123(2): 262–267.
Published Online: February 11, 2000
... 2000 hydrodynamics mechanical contact lubrication surface topography elasticity tribology viscosity Elastohydrodynamic Lubrication Film Thickness Nonsteady State Transient Stop–Start Grubin Part I of this study measured the film collapse in lubricated elastohydrodynamic...