Journal ArticleDOI
Thermal and Scuffing Behavior of Disks in Sliding-Rolling Contact
H. J. Carper,P. M. Ku +1 more
TLDR
In this paper, the results of scuffing tests performed with carburized AISI 9310 steel disks and a MIL-L-7808G oil, at a variety of sliding and sum velocities, and with disks ground both axially and circumferentially but with the same composite surface roughness are presented.Abstract:
This paper presents the results of scuffing tests performed with carburized AISI 9310 steel disks and a MIL-L-7808G oil, at a variety of sliding and sum velocities, and with disks ground both axially and circumferentially but with the same composite surface roughness. On the basis of these results, a methodology for correlating and predicting the thermal and scuffing behavior of sliding-rolling disks is suggested. It is demonstrated that the difference between the oil-film temperature at the conjunction inlet and the oil jet temperature, as well as the difference between the disk surface temperature and the oil jet temperature, are basically related to the frictional power loss at the sliding-rolling contact. The scuffing failure results are examined and compared by three different criteria: the critical temperature, the critical frictional power, and the critical frictional power intensity. It is shown that under certain operating conditions the critical temperature and critical frictional power intensit...read more
Citations
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Journal ArticleDOI
A review of scuffing models
W.F. Bowman,Gwidon Stachowiak +1 more
TL;DR: A review of existing theoretical scuffing models and theories can be found in this article, where the authors define the important factors involved in the initiation of scuffings and their correlation with a wealth of experimental test rigs.
Journal ArticleDOI
Gear Failure Modes—Importance of Lubrication and Mechanics
TL;DR: In this article, the principal lubrication-related failure modes of gear teeth are discussed, and the complex interactions between gear mechanics and gear lubrication in affecting such failure modes are examined.
Journal ArticleDOI
The Effects of Rolling and Sliding Speeds on the Scuffing of Lubricated Steel Discs
J. C. Bell,A. Dyson,J. W. Hadley +2 more
TL;DR: In this paper, an experiment was conducted to examine the independent influences of rolling speed and sliding speed on the scuffing of hardened steel discs lubricated by a mineral oil, and it was shown that both sliding speed and rolling speed have important effects on scuffings conditions.
Journal ArticleDOI
Analytical predictive modeling of scuffing initiation in metallic materials in sliding contact
TL;DR: In this paper, a predictive analytical model is developed for scuffing with adiabatic shear instability as the basic mechanism of failure is presented in the current paper, which expresses susceptibility of a sliding contact interface to scuffings in terms of material properties and contact conditions.
Journal ArticleDOI
Scuffing mechanism during oil-lubricated block-on-ring test with diamond nanoparticles as oil additive
TL;DR: In this paper, the mechanisms and microstructures of surface seizure induced scuffing in oil lubrication were investigated using experimental data including the profile of cavities and their surrounding plateaus, the chemical elements generated at these cavities, the selected area diffraction pattern of the lower specimen's cross-section surface, and the energy dispersive spectrum.
References
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Journal ArticleDOI
Metallic Contact and Friction between Sliding Surfaces
TL;DR: In this article, the authors measured both the instantaneous and average electrical resistance between the two surfaces and found that the electrical resistance oscillates rapidly between an extremely low value and infinity, suggesting that metallic contact is discontinuous.
Journal ArticleDOI
Instantaneous Coefficients of Gear Tooth Friction
G. H. Benedict,B. W. Kelley +1 more
TL;DR: In this paper, the instantaneous coefficient of friction follows the concept of transition from boundary to hydrodynamic lubrication, and the coefficient has been found to increase with increasing load and to decrease with increasing sum velocity, sliding velocity, and oil viscosity as each quantity is varied individually.
Journal ArticleDOI
Fourth Paper: Shear Behaviour of Elastohydrodynamic Oil Films at High Rolling Contact Pressures
Karlee Johnson,R. Cameron +1 more
TL;DR: In this article, the authors measured the apparent viscosity of E.H.L. oil films at very low sliding speeds, under isothermal conditions, and found that the variation with temperature at high pressure was exponential with an index similar to that at low pressure.