ASME International

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Elastohydrodynamic Lubrication of Elliptical Contacts for Materials of Low Elastic Modulus I—Fully Flooded Conjunction
ASME International - Tập 100 Số 2 - Trang 236-245 - 1978
B. J. Hamrock, D. Dowson
Our earlier studies of elastohydrodynamic lubrication of conjunctions of elliptical form are applied to the particular and interesting situation exhibited by materials of low elastic modulus. By modifying the procedures we outlined in an earlier publication, the influence of the ellipticity parameter k and the dimensionless speed U, load W, and material G parameters on minimum film thickne...... hiện toàn bộ
Effects of Asperities in Elastohydrodynamic Lubrication
ASME International - Tập 102 Số 3 - Trang 374-378 - 1980
M. Kaneta, A. Cameron
Optical interferometry was used to study rough surfaces under lubricated point contact. Three dimensional “asperities” of chromium were sputtered onto a steel ball which was run against a smooth glass plate under both rolling and sliding. The experimental results were compared with the various published theories. The film thicknesses found in sliding are different from those observed in pu...... hiện toàn bộ
The Role of Elastic Tangential Compliance in Oblique Impact
ASME International - Tập 103 Số 1 - Trang 74-80 - 1981
N. Maw, J. R. Barber, J. N. Fawcett
An extension of the Hertz theory of impact to the oblique impact of elastic bodies with circular contact is outlined. The tangential compliance of the contact surface under the action of Coulomb friction is shown to have a significant effect on the rebound angles, if the local angle of incidence does not greatly exceed the angle of friction. Experiments are described in which the trajector...... hiện toàn bộ
Component Hardness Differences and Their Effect on Bearing Fatigue
ASME International - Tập 89 Số 1 - Trang 47-54 - 1967
E. V. Zaretsky, R. J. Parker, W. J. Anderson
The five-ball fatigue tester and full-scale rolling-element bearings were used to determine the effect of component hardness differences of SAE 52100 steel on bearing fatigue and load capacity. Maximum fatigue life and load capacity are achieved when the rolling elements of a bearing are one to two points (Rockwell C) harder than the races. There appears to be an interrelation among compre...... hiện toàn bộ
Ball Motion in Thrust-Loaded, Angular Contact Bearings With Coulomb Friction
ASME International - Tập 93 Số 1 - Trang 32-38 - 1971
T. A. Harris
Dynamics of Rolling-Element Bearings—Part IV: Ball Bearing Results
ASME International - Tập 101 Số 3 - Trang 319-326 - 1979
Pradeep K. Gupta
Dynamic simulations of the performance of a ball bearing are presented in terms of the general motion as obtained by integrating the differential equations of motion of the various bearing elements. It is shown that bearing misalignment significantly influences the ball/cage and race/cage interaction and, hence, the stability of cage motion. The increased radial to axial load ratios promot...... hiện toàn bộ
An Analytical Method to Predict Skidding in Thrust-Loaded, Angular-Contact Ball Bearings
ASME International - Tập 93 Số 1 - Trang 17-23 - 1971
T. A. Harris
Dynamics of Rolling-Element Bearings—Part III: Ball Bearing Analysis
ASME International - Tập 101 Số 3 - Trang 312-318 - 1979
Pradeep K. Gupta
An analytical formulation for the generalized ball, cage, and race motion in a ball bearing is presented in terms of the classical differential equations of motion. Ball-race interaction is analyzed in detail and the resulting force and moment vectors are determined. The ball-cage and race-cage interactions are considered to be either hydrodynamic or metallic and a critical film thickness ...... hiện toàn bộ
Theory of Lubrication With Ferrofluids: Application to Short Bearings
ASME International - Tập 104 Số 4 - Trang 510-515 - 1982
N. Tipei
The momentum equations are written for viscous fluids exhibiting magnetic stresses. The velocity profiles are deduced; then from continuity, a pressure differential equation, equivalent to Reynolds equation is obtained. This equation is discussed with emphasis on the case when magnetic stresses derive from a potential, also when the pyromagnetic coefficient vanishes. The boundary condition...... hiện toàn bộ
A Bulk-Flow Theory for Turbulence in Lubricant Films
ASME International - Tập 95 Số 2 - Trang 137-145 - 1973
G. G. Hirs
The purpose of this study on the turbulent lubricant film is: 1 To give a brief outline of a new theory called bulk-flow theory; 2 To investigate to what extent results of theories based on law of wall and mixing length concept agree with the newly developed theory; 3 To provide a theoretical basis for the design of bearings lubricated by fluids of low kinematic viscosity.
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