Behaviour of a single dent within elastohydrodynamically lubricated contact has been observed both experimentally and numerically. The dent on the contact surface of the ball was artificially produced by a Rockwell indenter and the lip of raised metal around the perimeter of the depression was reduced by subsequent hand-polishing. Thin film colorimetric interferometry has provided precise film thickness data through the evaluation of chromatic interferograms. Obtained results are compared with data provided by a numerical solver for the contact problem that was developed and tested. From the results for different contact parameters it can be stated that good agreement between the numerical and experimental data was reached.
DowsonD.HigginsonG. R.A numerical solution to the elastohydrodynamical problemJ. Mech. Eng. Sci., 1959, 1 (1), 6–15.
2.
HamrockB. J.DowsonD.Isothermal elastohydrodynamic lubrication of point contacts, part I, theoretical formulationASME J. Lubr. Technol., 1976, 98, 223–229.
3.
HamrockB. J.DowsonD.Isothermal elastohydrodynamic lubrication of point contacts, part III - fully flooded resultsASME J. Lubr. Technol., 1977, 99, 264–276.
4.
DowsonD.EhretP.Past, present and future studies in elastohydrodynamicsProc. Instn Mech. Engrs, Part J: J. Engineering Tribology, 1999, 213, 317–333.
5.
VennerC. H.LubrechtA. A.Numerical simulation of a transverse ridge in a circular EHL contact under rolling/slidingASME J. Tribol., 1994, 116, 751–761.
6.
VennerC. H.LubrechtA. A.Transient analysis of surface features in an EHL line contact in the case of slidingTrans. ASME, 1994, 116, 186–193.
7.
AiX.ChengH. S.The influence of moving dent on point EHL contactsTribol. Trans., 1994, 37, 323–335.
8.
AiX.SawamiphakdiK.Solving elastic contact between rough surfaces as an unconstrained strain energy minimization by using CGM and FFT techniquesASME J. Lubr. Technol., 1999, 121, 639–647.
9.
WedevenL. D.CusanoC.Elastohydrodynamic film thickness measurements of artificially produced surface dents and groovesASLE Trans., 1979, 22, 369–381.
10.
KanetaM.CameronA.Effects of asperities in elastohydrodynamic lubricationASME J. Lubr. Technol., 1980, 102, 374–379.
11.
KanetaM.NishikawaH.Local reduction in thickness of point cntact EHL films caused by transversally oriented moving groove and its recoveryASME J. Tribol., 1994, 116, 635–639.
12.
GuangtengG.CannP. M.OlverA. V.SpikesH. A.Lubricant film thickness in rough surface, mixed elastohydrodynamic contactASME J. Tribol., 2000, 122, 65–76.
13.
Félix-QuiñonezA.EhretP.SummersJ. L.New experimental results of a single ridge passing through an EHL conjunctionASME J. Tribol., 2003, 125, 252–259.
14.
GlovneaR. P.ChooJ. W.OlverA. V.SpikesH. A.Compression of a single transverse ridge in a circular elastohydrodynamic contactASME J. Tribol., 2003, 125, 275–282.
15.
KřupkaI.HartlM.LiškaM.The influence of slide-to-roll ratio on lubricant film thickness distribution in the vicinity of real roughness features passing through EHD point contact. In 31st Leeds-Lyon Tribology Symposium onLife cycle tribology, 2005, pp. 48–56 (Elsevier).
16.
HamerJ. C.SaylesR. S.IoannidesE.Deformation mechanisms and stresses created by third body debris contacts and their effects on rolling bearing fatigue In Interface dynamics, Tribology series, vol. 12, 1987, pp. 201–208 (Elsevier).
17.
HamerJ. C.SaylesR. S.IoannidesE.Particle deformation and counter-face damage when relatively soft particles are squashed between hard anvilsTribol. Trans., 1989, 32, 281–288.
18.
GogliaP. R.CusanoC.ConryT. F.The effects of surface irregularities on the elastohydrodynamic lubrication of sliding line contacts, part I - single irregularitiesASME J. Tribol., 1984, 106, 113–119.
19.
VennerC. H.LubrechtA. A.ten NapelW. E.Numerical simulation of the over-rolling of a surface feature in an EHL line contactTrans. ASME, J. Tribol., 1991, 113, 777–783.
20.
AiX.LeeS. C.Effect of slide-to-roll ratio on interior stresses around a dent in EHL contactsTribol. Trans., 1996, 39, 881–889.
21.
DumontM.LugtP. M.TrippJ. H.Surface feature effects in starved circular EHL contactsASME J. Tribol., 2002, 124, 358–366.
22.
ZhaoJ. X.SadeghiF.The effects of a stationary surface pocket on EHL line contact start-upASME J. Tribol., 2004, 126, 672–680.
23.
MourierL.MazuyerD.LubrechtA. A.DonnetC.Transient increase of film thickness in microtextured EHL contactsTribol. Int., 2006, 39, 1745–1756.
24.
HartlM.KřupkaI.PoliščukR.LiškaM.An automatic system for real-time evaluation of EHD film thickness and shape based on the colorimetric interferometryTribol. Trans., 1999, 42, 303–309.
25.
HartlM.KřupkaI.PoliščukR.LiškaM.MolimardJ.VergneP.QuerryM.Thin film colorimetric interferometryTribol. Trans., 2001, 44, 270–276.
KanetaM.KanadaT.NishikawaH.Optical interferometric observations of the effects of a moving dent on point contact EHL In Elastohydrodynamics'96 - fundamentals and applications in lubrication and traction, Tribology series, vol. 32, 1997, pp. 69–79 (Elsevier, Amsterdam).
