... or degradation. The time-temperature-pressure superposition (TTPS) principle, or the method of reduced variables, is an essential part of quantitative elastohydrodynamics where the temporary shear dependence of the viscosity or shear-thinning of the liquid must be known. Pressure shifting is obviously...

... ≤ X ≤ 6 ; the former is about 1.2% in H and about 1.5% in P larger than the latter. However, the purpose of this study is to elucidate and explain the basic characteristics on the impact elastohydrodynamics. Therefore, 0 ≤ X ≤ 3 and 0 ≤ Y ≤ 3 for k e = 1...

...Azam Thatte; Richard F. Salant A visco-elastohydrodynamic model of a hydraulic rod seal during transient operation has been developed. The model includes analyses of the macro- and microscale deformation mechanics and contact mechanics, and the microscale fluid mechanics. Viscoelasticity enters...

... 03 2010 differential equations elasticity elastodynamics finite element analysis friction hydrodynamics liquid films machine bearings oils rotors valves tilting-pad journal bearings control elastohydrodynamics vibration Curves of static oil film thickness...

...Azam Thatte; Richard F. Salant A soft elastohydrodynamic model of a reciprocating elastomeric hydraulic rod seal has been developed. It consists of coupled fluid mechanics, contact mechanics, and deformation analyses. The model has been used to analyze a U-cup lip seal in an injection molding...

...Bo Yang; Richard F. Salant A numerical soft elastohydrodynamic lubrication model of a reciprocating hydraulic seal has been used to simulate the performance of a U-cup seal and a step seal in a conventional actuator. The model consists of coupled steady state fluid mechanics, deformation mechanics...

...Scott Bair; Riccardo Casalini Quantitative calculations of film thickness and friction in elastohydrodynamic lubrication will require that the low-shear viscosity, μ , be described with far greater accuracy than it is today. The free volume model has the advantage, over those currently used...

... Seal ,” Proceedings of the Second BHRA International Conference on Fluid Sealing , Vol. B6 . Field , G. J. , and Nau , B. S. , 1974 , “ A Theoretical Study of the Elastohydrodynamic Lubrication of Reciprocating Rubber Seals ,” ASLE Trans. 0569-8197 10.1080/05698197508982746 , 18...

... polymer additives are often added to the base oil. This paper investigates the effect of mixture rheology on elastohydrodynamic lubrication (EHL) film thickness using EHL contact measurements and a full numerical analysis for three synthetic lubricants including two single-component lubricants PAO650...

...Philip C. Hadinata; Lyndon Scott Stephens A numerical analysis is conducted to investigate the elastohydrodynamic effect of deterministic microasperities on the shaft of a lip seal. Various geometries of microasperities (triangular, square, hexagonal, and circular) are put into a 100 × 100 μ m 2...

... seal elastohydrodynamics Since the equations discussed above are strongly coupled, it is necessary to use an iterative computational procedure, as shown in Fig. 3 . Initially, the seal and fluid properties, the operating conditions, and the influence coefficients are input. Next, the static...

...-viscosity behavior. More than 100 years ago, measurements of the effect of pressure on viscosity were made by number of researchers, the most well known being Barus. Dowson , D. , and Higginson , G. R. , 1966 , Elastohydrodynamic Lubrication , Pergamon Press , Oxford. Hamrock , B...