Showing papers in "Journal of Lubrication Technology in 1969"
TL;DR: Finite element solution of incompressible lubrication problem by minimum principle for transient incompressibility Reynolds equation with boundary conditions as discussed by the authors, where the minimum principle is used to solve the problem.
Abstract: Finite element solution of incompressible lubrication problem by minimum principle for transient incompressible Reynolds equation with boundary conditions
134 citations
116 citations
TL;DR: The Standard handbook of lubrication engineering as discussed by the authors is a standard handbook for the field of Lubrication Engineering and can be found in the following places: http://www.standardhandbookoflubricationengineering.org/
Abstract: Standard handbook of lubrication engineering , Standard handbook of lubrication engineering , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
87 citations
65 citations
61 citations
50 citations
50 citations
47 citations
TL;DR: Rolling induced residual stress measurements as function of depth and component Rockwell hardness for inner races from deep groove ball bearings were taken by as mentioned in this paper for the inner races of ball bearings.
Abstract: Rolling induced residual stress measurements as function of depth and component Rockwell hardness for inner races from deep groove ball bearings
45 citations
44 citations
TL;DR: In this paper, the effect of film thickness in solid friction is reviewed, and it is shown that coefficient of friction f obeys the relation f ∝ 1/P for variable load P and constant thickness h, f ∈ h for constant load and variable film thickness, and f ∆ h/P in the general case.
Abstract: The effect of film thickness in solid friction is reviewed. Two regimes are distinguished: (a) increasing coefficient of friction with decreasing film thickness which occurs for ultrathin films and (b) decreasing coefficient of friction with decreasing film thickness which occurs for thin films. The former regime has previously been treated by the author; consequently, attention is focused on the latter regime. A review of the thin film phenomenon establishes that it is very much dependent on the type of deformation occurring at the contact and concludes that no single expression can uniquely describe it for all materials situations. A special theory is put forth for the contact situation corresponding to a model of an elastic layer of much less rigidity than its substrate and indenter. This situation corresponds to practically all naturally occurring and bonded nonmetallic solid lubricant films of industrial and scientific interest. It is shown that coefficient of friction f obeys the relation f ∝ 1/P for variable load P and constant thickness h, f ∝ h for constant load and variable film thickness, and f ∝ h/P for the general case. These expressions are verified by use of data from pin-on-disk tests, Falex tests, 4-ball tests, modified MacMillan tests, and other types of tests. The experimental data are for naturally formed graphite on diamond, SiO2 bonded PbO on stainless steel, and phenolic bonded 9MoS2 -1 graphite films on steel and aluminum.
TL;DR: Herringbone grooved gas lubricated journal bearing stability, testing effects of geometries and clearances on onset speed for half frequency whirl was performed in this paper, where the effects of geometry and clearance on the onset speed were evaluated.
Abstract: Herringbone grooved gas lubricated journal bearing stability, testing effects of geometries and clearances on onset speed for half frequency whirl
TL;DR: In this article, a method for the simultaneous solution of the Reynolds and energy equations and their coupling with elastic deformation results obtained by variational techniques is presented for centrally pivoted, tilting-pad, sector, thrust bearings.
Abstract: The importance of temperature and elasticity effects in bearings have been demonstrated by several authors. This paper offers an efficient method for the simultaneous solution of the Reynolds and energy equations and their coupling with elastic deformation results obtained by variational techniques. Results are presented for centrally pivoted, tilting-pad, sector, thrust bearings.
TL;DR: In this paper, an analysis was performed and a computer program was written to predict the motion of the supported mass, and good agreement was shown between the analysis and the computer program and the experiment, except that two of the observed operation points cannot be verified.
Abstract: An experiment is described in which the motion of the supported mass was the main contributor to the generation of the squeeze film. An analysis was performed and a computer program written to predict the motion of the supported mass. Good agreement is shown between the analysis and the computer program and the experiment, except that two of the observed operation points cannot be verified.
TL;DR: In this paper, the contact conformity effects on spinning torque and friction coefficient in angular contact ball bearings from lubricated and unlubricated tests were investigated for both linear and nonlinear bearing types.
Abstract: Contact conformity effects on spinning torque and friction coefficient in angular contact ball bearings from lubricated and unlubricated tests
TL;DR: In this article, non-contacting gas seals were investigated for performance characteristics of spiral groove and shrouded Rayleigh step profiles, and the performance of the spiral groove was compared to the shrouded rayleigh step profile.
Abstract: Noncontacting gas seals investigated for performance characteristics of spiral groove and shrouded Rayleigh step profiles