NDLI: Heat Partition in Rolling/Sliding Elastohydrodynamic Contacts

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Clarke, A. Sharif, K. J. Evans, H. P. Snidle, R. W.
Copyright Year	2004
Abstract	The paper presents the results of a thermal analysis of a set of disk experiments carried out by Patching et al. to investigate scuffing. The experiments used crowned steel disks at 76 mm centres with maximum Hertzian contact pressures of up to 1.7 GPa. Experimental measurements of contact friction were used as the basis for a thermal analysis of the disks and their associated support shafts. Temperatures measured by embedded thermocouples 3 mm below the running tracks of the disks were used to determine the heat partition between the faster and slower running disks in order to match the experimental with calculated temperatures. This partition was found to vary approximately as a function of the product of sliding speed and surface temperature difference. A transient (flash) temperature analysis of one of the experiments was also carried out. This shows large differences between the disk transient surface temperatures. These surface temperature distributions were compared with those obtained from corresponding elastohydrodynamic lubrication (EHL) analyses using two different non-Newtonian lubricant formulations. The EHL analyses show that the heat partition obtained depends on the form of non-Newtonian behaviour assumed, and that to achieve the same partition as is evident in the experiment a limiting shear stress formulation is necessary. It is suggested that the combination of heat transfer and EHL analysis presented in the paper could be used as a sensitive tool for distinguishing between different non-Newtonian lubricant models under realistic engineering loads and with high sliding speeds.
Sponsorship	Tribology Division
Starting Page	479
Ending Page	493
Page Count	15
File Format	PDF
ISBN	0791841812
DOI	10.1115/TRIB2004-64250
e-ISBN	0791841782
Volume Number	ASME/STLE 2004 International Joint Tribology Conference, Parts A and B
Conference Proceedings	ASME/STLE 2004 International Joint Tribology Conference
Language	English
Publisher Date	2004-10-24
Publisher Place	Long Beach, California, USA
Access Restriction	Subscribed
Subject Keyword	Heat partition Limiting shear stress Non-newtonian ehl Traction Flash temperatures Shear stress Heat Temperature
Content Type	Text
Resource Type	Article

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