Analysis of Surface Scratch in Finite Line Contact EHL

Abstract:

In this paper, the phenomenon of roller scratch in Elastohydrodynamic lubrication(EHL) state is simulated successfully. A complete thermal EHL solutions of finite roller with scratch are obtained. Comparasions between current numerical film contours and Cameron’s optical interferometry graph shows satisfactory agreement. The characteristics of pressure, filmthickness as well as temperature distributions are discovered numerically. It could be concluded that surface scratch will generate a pressure increase, a high temperature and a thin film distributions on both outsides of the scratch, as well as a pressure drop, a low temperature and a thicker film distributions at the inside location of the scratch. Therefore, it will produce a local sharp maximum stress concentration and may possiblly lead to lubrication failure, which will accelerate the process of surface fatigue.

• Periodical: Advanced Materials Research (Volume 651)
• Pages: 651-655
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.651.651
• Online since: January 2013
• Authors: Hao Yang Sun
• Keywords: Elasto-Hydrodynamic Lubrication (EHL), Finite Line Contact, Roller Scratch

References

[1] A. A. Lubrecht, W. E. Ten Napel and R. Bosma. Multigrid, an alternative method for calculation film thickness and pressure profiles on the Elastohydrodynamic lubricated line contacts, ASME Journal of Tribology, 108: 551−556 (1986).

DOI: 10.1115/1.3261260

[2] C. H. Venner. Multilevel solution of the EHL line and point contact problems, Ph.D. thesis, Twente University, Enschede, Netherlands (1991).

[3] D.G. Wymer, A. Cameron. Elastohydrodynamic lubrication of a line contact, Proc. Inst. Mech. Eng. 188: 221−238 (1974).

[4] E. O. Stejskal, A. Cameron. Optical interferometry study of film formation in lubrication of sliding and/or rolling contacts, NASA report, Lewis Research Center (1972).

[5] H. Bahadoran, R. Gohar. End closure in Elastohydrodynamic line contact, J. Mech. Eng. Sci. 16: 276−278 (1974).

DOI: 10.1243/jmes_jour_1974_016_048_02

[6] A. Mostofi, R. Gohar. Elastohydrodynamic lubrication of a finite line contact, J. Lubric. Technol. 105: 598−604 (1983).

DOI: 10.1115/1.3254683

[7] F. D. M. Barragan de Ling, H. P. Evans, R. W. Snidle. Thrust cones lubrication. Part 1: Elastohydrodynamic analysis of conical rims, Proc. Inst. Mech. Eng., Part J. 210: 85−96 (1996).

DOI: 10.1243/pime_proc_1996_210_484_02

[8] F. D. M. Barragan de Ling, H. P. Evans, R. W. Snidle. Thrust cones lubrication. Part 2: Elastohydrodynamic analysis of conical rims, Proc. Inst. Mech. Eng., Part J. 210: 97−105 (1996).

DOI: 10.1243/pime_proc_1996_210_485_02

[9] Park Tae-Jo, Kim Kyung-Wong. Elastohydrodynamic lubrication of a finite line contact, Wear. 223: 102−109 (1998).

DOI: 10.1016/s0043-1648(98)00317-2

[10] Xiaoyang Chen, Xuejin Shen, Wen Xu and Jiaju Ma. Elastohydrody-namic lubrication of logarithmic profile roller contacts, Chinese Journal of Mechanical Engineering, 14: 347−352 (2001). (in Chinese).

DOI: 10.3901/cjme.2001.04.347

[11] M. Kushwaha, H. Rahnejat, R. Gohar. Aligned and misaligned contacts of rollers to races in Elastohydrodynamic finite line conjunctions, Proc. Inst. Mech. Eng., Part C, 216: 1051−1069 (2002).

DOI: 10.1243/095440602761609434

[12] M. Kushwaha, H. Rahnejat. Transient Elastohydrodynamic lubrication of finite line conjunction of cam to follwer concentrated contact, J. Phys. D: Appl. Phys. 35: 2872−2890 (2002).

DOI: 10.1088/0022-3727/35/21/327

[13] Xiaoling Liu, Peiran Yang. Analysis of the thermal Elastohydrodynamic lubrication of a finite line contact, Tribology International, 35: 137−144 (2002).

DOI: 10.1016/s0301-679x(01)00107-4

[14] Haoyang Sun, Xiaoyang Chen. Thermal EHL Analysis of Cylinderical Roller Under Heavy Load, IUTAM Symposium on Elastohydrodynamics and Micro-elastohydrodynamics, Proceedings of International Union of Theoretical and Applied Mechanics held in Cardiff, UK, 107-120(2004).

DOI: 10.1007/1-4020-4533-6_8

[15] Xiaoling Liu, Peiran Yang. Numerical analysis of the oil-supply condition in isothermal elastohydrodynamic lubrication of finite line contacts. Tribology Letters, 38(2): 115-124 (2010).

DOI: 10.1007/s11249-010-9580-x

[16] Ning Ren, Dong Zhu, W. Wayne Chen, Yuchuan Liu, Q. Jane Wang. A Three-Dimensional deterministic model for rough surface line-contact EHL problems. ASME Journal of Tribology, 131(1): 011501-1~9(2009).

DOI: 10.1115/1.2991291