Journal ArticleDOI
A Rheological Model for Elastohydrodynamic Contacts Based on Primary Laboratory Data
Scott Bair,Ward O. Winer +1 more
TLDR
In this article, a shear rheological model based on primary laboratory data is proposed for concentrated contact lubrication, which is a Maxwell model modified with a limiting shear stress.Abstract:
A shear rheological model based on primary laboratory data is proposed for concentrated contact lubrication. The model is a Maxwell model modified with a limiting shear stress. Three material properties are required: Low shear stress viscosity, limiting elastic shear modulus, and the limiting shear stress the material can withstand. All three are functions of temperature and pressure. In applying the model to EHD contacts the predicted response possesses the characteristics expected from several experiments reported in the literature and, in one specific case where direct comparison could be made, good numerical agreement is shown.read more
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Journal ArticleDOI
The Rheological Properties of Elastohydrodynamic Lubricants
C R Evans,Karlee Johnson +1 more
TL;DR: In this paper, a non-linear Maxwell rheological model based on the Eyring theory of fluid flow was proposed for disc machine traction tests of EHD lubricants at constant mean film temperature, and the model incorporates three fluid properties: shear modulus G, viscosity τ and Eyring stress τ 0.
Journal ArticleDOI
The Stribeck Curve: Experimental Results and Theoretical Prediction
TL;DR: In this paper, the authors report the results of a series of experiments performed on a journal bearing together with a theoretical prediction of the Stribeck-type behavior for various loads and oil temperatures.
Journal ArticleDOI
A Computer Program Package for the Prediction of EHL and Mixed Lubrication Characteristics, Friction, Subsurface Stresses and Flash Temperatures Based on Measured 3-D Surface Roughness
Dong Zhu,Yuan-Zhong Hu +1 more
TL;DR: In this paper, a unified numerical approach for point contact problems is presented, which is capable of simulating the entire transition from the full film EHD, mixed, down to boundary lubrication, using measured 3-D roughness.
Journal ArticleDOI
On lubricant transport conditions in elastohydrodynamic conjuctions
TL;DR: In this article, new numerical results based upon the concept of solidification were produced which match the intriguing dimple observed by Kaneta in elastohydrodynamic lubrication of point contacts under pure sli...
Journal ArticleDOI
Influence of lubricant properties on elastohydrodynamic lubrication
TL;DR: In this paper, the influence of pressure and temperature on viscosity, limiting shear stress and density, has to be taken into account when creating lubricant models to be used in numerical calculations of film thickness and friction.