Download or read book Thermal Non Newtonian Elastohydrodynamic Lubrication of Line Contacts Under Sliding rolling and Simple Sliding Conditions written by Shao Wang and published by . This book was released on 1991 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thermal Reynolds-Eyring equation is derived to study the elastohydrodynamic lubrication of line contacts. This lubrication condition is usually found in spur gears, roller bearings and cams. The inlet region with back-flow is treated with a control volume scheme to obtain the temperature solution. A computationally-simple formulation for the stationary surface temperature is developed for simple sliding conditions. The most influential dimensionless groups are identified from the complete sets of dimensionless groups. Numerical results obtained for sliding and rolling and for simple sliding conditions are used to develop formulas for the thermal and non-Newtonian (Ree-Eyring) film thickness reduction factor. Even when thermal effects are small, these formulas can still give a film thickness reduction due to the non-Newtonian effects. Results for the maximum temperatures and traction coefficient are also presented. The pressure dependence of lubricant thermal conductivity is found to significantly affect the maximum lubricant temperature. The thermal effects on film thickness and traction are found to be more pronounced for simple sliding than for combined sliding and rolling conditions. Under simple sliding, the heat transferred to the stationary surface is found to be very small compared to that transferred to the moving surface and lubricating fluid.
Download or read book Thermal and Non Newtonian Effects in Elastohydrodynamic Lubrication of Rolling sliding Contacts written by Moosa Zand and published by . This book was released on 1990 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Elastohydrodynamic Lubrication of Line Contacts written by and published by . This book was released on 1983 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Elastohydrodynamic Lubrication of Rolling sliding Contacts written by Farshid Sadeghi and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete numerical solution of thermal compressible elastohydrodynamic lubrication of rolling/sliding contacts has been obtained. The Newton-Raphson technique is used to solve the simultaneous system of Reynolds and elasticity equations. The control volume finite element modeling was employed to solve the energy equation and its boundary conditions. The effects of various loads, speeds, and slip conditions on the lubricant temperature, film thickness, and friction force have been investigated. The results indicate that the temperature effects are significant and cannot be neglected.
Download or read book Interdisciplinary Approach to the Lubrication of Concentrated Contacts written by P. M.. Ku and published by . This book was released on 1970 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Thermal Elastohydrodynamic Lubrication in Rolling sliding Contacts written by Farshid Sadeghi and published by . This book was released on 1985 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elastohydrodynamic Lubrication for Line and Point Contacts written by Ilya I. Kudish and published by CRC Press. This book was released on 2013-06-17 with total page 703 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elastohydrodynamic Lubrication for Line and Point Contacts: Asymptotic and Numerical Approaches describes a coherent asymptotic approach to the analysis of lubrication problems for heavily loaded line and point contacts. This approach leads to unified asymptotic equations for line and point contacts as well as stable numerical algorithms for the so
Download or read book Modeling and Analysis of Elastohydrodynamic Lubrication of Line Contacts Considering Thermal and Non Newtonian Effects written by Hsing-Sen Hsiao and published by . This book was released on 1992 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Elastohydrodynamic Lubrication of Line Contacts written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-20 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical solution to the problem of thermal elastohydrodynamic lubrication of line contacts was obtained by using a finite difference formulation. The solution procedure consists of simultaneous solution of the thermal Reynolds equation, the elasticity equation, and the energy equation subject to appropriate boundary conditions. Pressure distribution, film shape, and temperature distribution were obtained for fully flooded conjunctions, a paraffinic lubricant, and various dimensionless speed parameters while the dimensionless load and materials parameters were held constant. Reduction in the minimum film thickness due to thermal effects (as a ratio of thermal to isothermal minimum film thickness) is given by a simple formula as a function of the thermal loading parameter Q: H(min)/H(min, I) = 10/10+ Q(0.4). Plots of pressure distribution, film shape, temperature distribution, and flow are shown for some representative cases. Ghosh, M. K. and Hamrock, B. J. Glenn Research Center NASA-TM-83424, E-1617, NAS 1.15:83424 RTOP 505-33-1B...
Download or read book Analysis of Thermal Elastohydrodynamic Lubrication in Rolling sliding Contact written by Farshid Sadeghi and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elasto Hydrodynamic Lubrication written by D. Dowson and published by Elsevier. This book was released on 2014-07-18 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elasto-Hydrodynamic Lubrication deals with the mechanism of elasto-hydrodynamic lubrication, that is, the lubrication regime in operation over the small areas where machine components are in nominal point or line contact. The lubrication of rigid contacts is discussed, along with the effects of high pressure on the lubricant and bounding solids. The governing equations for the solution of elasto-hydrodynamic problems are presented. Comprised of 13 chapters, this volume begins with an overview of elasto-hydrodynamic lubrication and representation of contacts by cylinders, followed by a discussion on equations relevant to lubrication, including the Reynolds equation. The reader is then introduced to lubrication of rigid cylinders; the importance of film thickness in highly loaded rigid contacts; the elasticity of solids in contact; and the theory of elasto-hydrodynamic lubrication. Subsequent chapters focus on apparatus and measurements of film thickness and film shape; friction and viscosity; and lubrication of gears and roller bearings. This book will be of interest to tribologists.
Download or read book Temperature and Surface Damage Under Lubricated Sliding rolling Contacts written by Eugene Y. Hsue and published by . This book was released on 1984 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Numerical Solution to the Thermal elastohydrodynamic Lubrication of Rolling and Sliding Cylinders written by H. S. Cheng and published by . This book was released on 1964 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Existing isothermal theories of elastohydrodynamic lubrication of rollers are extended to include the effects of temperature in the fluid and the solids due to heating from rolling, sliding and compression of the lubricant. The two dimensional finite difference method has been used in calculating the temperature in the fluid using local pressure-temperature dependent viscosity. Both the compressibility effect and the heat from compression of the lubricant are considered in the solution of the Reynolds and the energy equation. Two series of results were obtained. The first is a heavily loaded series intended to correlate with Crook's experimental results, and the second is a moderately loaded series intended to correlate with temperature measurements taken at this laboratory. These results show that temperature has a significant influence upon the shape of the pressure, film profile, but very little effect upon the magnitude of the film thickness in the contact zone. The frictional force is, however, strongly influenced by the temperature rise in the film. (Author).
Download or read book Interdisciplinary Approach to the Lubrication of Concentrated Contacts written by Pei Moo Ku and published by . This book was released on 1971 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ball Bearing Lubrication written by Bernard J. Hamrock and published by John Wiley & Sons. This book was released on 1981 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Non Newtonian Elastohydrodynamic Lubrication of Point Contacts written by Jun Liu and published by . This book was released on 1994 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Friction and Heat Generation in Rolling sliding Contacts in the Elastohydrodynamic Lubrication Regime written by Salem Almail and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
