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RISThe Barus–Roelands–Eyring Viscosity Artifice: A Catastrophe for Elastohydrodynamic Lubrication
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. Ward Winer was a pioneer in the high-pressure rheology of liquid lubricants who championed the use of viscometers to understand the rheology of elastohydrodynamic lubrication (EHL). The classical approach to EHL ...
Application of the Ree-Eyring Model to Liquid Lubricants
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. One of the many contributions of Professor Ward Winer to tribology was his insistence that constitutive equations for liquid lubricants have a basis in empirical fact. He was awarded the 1986 Tribology Gold Medal ...
A Universal Mixing Rule for the High-Pressure Viscosity of Oil/Refrigerant Mixtures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Bearing life analysis for the rolling element bearings in refrigeration compressors requires an accurate estimate of the film thickness. An alternative is offered here to the experimentally challenging pressure–viscosity ...
Time Temperature Pressure Superposition in Polymer Thickened Liquid Lubricants
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Sheardependent viscosities have been measured over a range of temperature and pressure for seven engine oils blended to have kinematic viscosity of 14 mm2/s at 100 آ°C with two base oils and four viscosity modifiers. ...
Your EHD Rig May Not Be As Elastohydrodynamic As You Think
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The concentrated contact formed between a steel ball and a glass disc—the optical elastohydrodynamic lubrication (EHD) rig—has been the primary instrument for experimental investigations of elastohydrodynamic film thickness. ...
Erratum: “Revisiting the ASME Pressure–Viscosity Report Using the Tait-Doolittle Correlations” [ASME J. Tribol., 2021, 143(6), p. 061901DOI: 10.1115/1.4048605]
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Table 3 should be corrected as shown below to list a reference temperature of 311 K which was used throughout the Zolper et al. [1] manuscript. The fit parameters in the table are unchanged.The authors originally used ...
Elastohydrodynamic Lubrication Traction Coefficient is Not a Property of the Liquid Alone
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The slow progress in the prediction of elastohydrodynamic film thickness and friction may be attributed to the mistaken notion that a traction curve is equivalent to a rheological flow curve. A similar concept is being ...
Quantitative Elastohydrodynamic Lubrication—Seventeen Years In
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Seventeen years have passed since the first full elastohydrodynamic lubrication (EHL) simulation employed the real pressure and shear dependence of viscosity measured in viscometers to accurately predict film thickness and ...
Rheology Extracted From Traction Curves: Is There Enough Information?
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. Most published high-pressure rheological properties of elastohydrodynamic lubrication (EHL) lubricants came about from the Roelands/Eyring framework applied to measured traction. Sometimes Roelands is replaced ...
The Viscosity of Polyalphaolefins Mixtures at High Pressure and Stress
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Understanding the pressure and shear dependence of viscosity is essential to an understanding of the mechanisms of film forming and friction in concentrated contacts. The blending of different molecular mass polyalphaolefins ...