Journal ArticleDOI
A New High-Pressure, High-Shear Stress Viscometer and Results for Lubricants
Scott Bair,Ward O. Winer +1 more
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In this article, a new high-pressure, high-shear stress viscometer has been developed with a pressure capability of 300 MPa and shear stress of 26 MPa for shear.Abstract:
A new high-pressure, high-shear stress viscometer has been developed with a pressure capability of 300 MPa and shear stress of 26 MPa for shear which is essentially isothermal in the context of the...read more
Citations
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History, Origins and Prediction of Elastohydrodynamic Friction
Hugh Spikes,Zhang Jie +1 more
TL;DR: In this paper, the authors review the origins of this debate, which primarily concerns a divergence of views between researchers using high pressure, high shear rate viscometry and those concerned with the measurement and analysis of elastohydrodynamic friction; the former advocate a Carreau-based shear stress/strain rate model while the latter generally favour an Eyring-based one.
Journal ArticleDOI
Miscibility, density and viscosity of poly(dimethylsiloxane) in supercritical carbon dioxide
Yan Xiong,Erdogan Kiran +1 more
TL;DR: In this paper, phase boundaries, densities and viscosities of solutions of poly(dimethylsiloxane)s (PDMS) in supercritical carbon dioxide have been determined.
Journal ArticleDOI
High-pressure rheology of lubricants and limitations of the Reynolds equation
TL;DR: In this article, a review of high pressure rheology leads to the conclusion that the results from rheometers may be used to generate empirical rate equations which are useful in modelling elastohydrodynamic traction.
Journal ArticleDOI
Towards the true prediction of EHL friction
TL;DR: In this article, the capability to predict elastohydrodynamic film-thickness and friction from primary measurements of transport properties of liquid has been an elusive goal for tribologists for 50 years.
Journal ArticleDOI
The temperature, pressure and time dependence of lubricant viscosity
TL;DR: In this paper, it was shown that for the timescale of viscous response, a significant time dependence of viscosity is unlikely for the viscous regime of EHL traction.
References
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Journal ArticleDOI
Shear behaviour of elastohydrodynamic oil films
K L Johnson,J. L. Tevaarwerk +1 more
TL;DR: In this article, a simple constitutive equation is proposed for the isothermal shear of lubricant films in rolling/sliding contacts. But the model may be described as nonlinear Maxwell, since it comprises nonlinear viscous flow superimposed on linear elastic strain.
Journal ArticleDOI
Shear strength measurements of lubricants at high pressure
Scott Bair,Ward O. Winer +1 more
TL;DR: The maximum yield shear stress is a function of temperature and pressure and is believed to be the property which determines the maximum traction in elastohydrodynamic contacts such as traction drives as discussed by the authors.
Journal ArticleDOI
The High Pressure High Shear Stress Rheology of Liquid Lubricants
Scott Bair,Ward O. Winer +1 more
Journal ArticleDOI
Some Observations in High Pressure Rheology of Lubricants
Scott Bair,Ward O. Winer +1 more
TL;DR: In this paper, the authors presented experimental data on viscosity, elastic shear modulus, and limiting shear stress of 12 liquid lubricants, and they found that transition histories do affect the limiting stress of the materials in the form of isothermal compression resulting in a lower density and lower limiting stress than isobaric cooling.