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RISFast Numerical Calculations of EHD Sliding Traction Forces; Application to Rolling Bearings
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Based on analytical calculations assuming isothermal elastohydrodynamic (EHD) lubrication conditions, and on curve-fitting of a thermal correction factor, a new formula is proposed to calculate the ...
New Results of Traction Force Calculations in Elastohydrodynamic Contacts
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The lubricant shear modulus G and Ree-Eyring shear stress τ0 are determined in this work by using Roelands’, rather than Barus’, relationship for calculating the lubricant viscosity. When using ...
A Uniform Analytical Approach for Ball and Roller Bearings Calculations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A novel analytical approach is proposed, uniform for ball and roller bearings, which takes into account 5 relative race displacements (3 translations: dx, dy, and dz, and 2 tilting angles: dθy ...
Discussion: “Elastohydrodynamic Behavior of Elliptical Contacts Under Pure Rolling Situations” (Mokhtar, M. O. A., and Abdel Ghany, A. A., 1987, ASME J. Tribol., 109, pp. 659–663)
Publisher: The American Society of Mechanical Engineers (ASME)
Piezoviscous-Rigid Rolling and Sliding Traction Forces, Application: The Rolling Element–Cage Pocket Contact
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Piezoviscous Rigid (PVR) film thicknesses, rolling and sliding traction forces formulas for the line and point contact case have been derived. They have been used to study the Rolling Element ...
The Film Thickness in Piezoviscous-Rigid Regime; Film Thickness Lubrication Regimes Transition Criteria
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A new general formula is proposed to calculate the lubricant film thickness in the piezoviscous rigid lubrication regime. Equivalent radii ratio, load, speed, and material dimensionless parameters ...
Rolling Bearing Stress Based Life—Part I: Calculation Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Rolling contact bearing life is calculated using stresses calculated at the surface and in the volume. Surface stresses account for profile and misalignment as well as asperity deformations. ...
Discussion: “Thermal Effects in Rolling/Sliding Contacts: Part 2—Analysis of Thermal Effects in Fluid Film” (Sadeghi, Farshid, and Dow, Thomas A., 1987, ASME J. Tribol., 109, pp. 512–517)
Publisher: The American Society of Mechanical Engineers (ASME)
Discussion: “Influence of Surface Waviness and Roughness on the Normal Pressure Distribution in the Hertzian Contact” (Seabra, J., and Berthe, D., 1987, ASME J. Tribol., 109, pp. 462–469)
Publisher: The American Society of Mechanical Engineers (ASME)
Contact Pressure of Indented Wide Elliptical Contacts: Dry and Lubricated Cases
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Indents perturb the pressure and stress distribution and increase the failure risk of rolling element bearings. A numerical study of the pressure perturbation is proposed. An existing dry contact ...