Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
A Technique For Determining The Rheology Of Lubricants At High Pressures And High Shear Rates
Download A Technique For Determining The Rheology Of Lubricants At High Pressures And High Shear Rates full books in PDF, epub, and Kindle. Read online A Technique For Determining The Rheology Of Lubricants At High Pressures And High Shear Rates ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis A Technique for Determining the Rheology of Lubricants at High Pressures and High Shear Rates by : Kaliat Thazhathveettil Ramesh
Download or read book A Technique for Determining the Rheology of Lubricants at High Pressures and High Shear Rates written by Kaliat Thazhathveettil Ramesh and published by . This book was released on 1985 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Pressure Rheology for Quantitative Elastohydrodynamics by : Scott S. Bair
Download or read book High Pressure Rheology for Quantitative Elastohydrodynamics written by Scott S. Bair and published by Elsevier. This book was released on 2007-03-06 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational elastohydrodynamics, a part of tribology, has existed happily enough for about fifty years without the use of accurate models for the rheology of the liquids used as lubricants. For low molecular weight liquids, such as low viscosity mineral oils, it has been possible to calculate, with precision, the film thickness in a concentrated contact provided that the pressure and temperature are relatively low, even when the pressure variation of viscosity is not accurately modelled in detail. Other successes have been more qualitative in nature, using effective properties which come from the fitting of parameters used in calculations to experimental measurements of the contact behaviour, friction or film thickness. High Pressure Rheology for Quantitative Elastohydrodynamics is intended to provide a sufficiently accurate framework for the rheology of liquids at elevated pressure that it may be possible for computational elastohydrodynamics to discover the relationships between the behaviour of a lubricated concentrated contact and the measurable properties of the liquid lubricant. The required high-pressure measurement techniques are revealed in detail and data are presented for chemically well-defined liquids that may be used as quantitative reference materials. * Presents the property relations required for a quantitative calculation of the tribological behaviour of lubricated concentrated contacts.* Details of high-pressure experimental techniques.* Complete description of the pressure and temperature dependence of viscosity for high pressures.* Some little-known limitations on EHL modelling.
Book Synopsis The Rheology of Lubricants by : T. C. Davenport
Download or read book The Rheology of Lubricants written by T. C. Davenport and published by . This book was released on 1973 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rheology and Elastohydrodynamic Lubrication by : B.O. Jacobson
Download or read book Rheology and Elastohydrodynamic Lubrication written by B.O. Jacobson and published by Elsevier. This book was released on 1991-07-24 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a thorough overview on recent developments in lubricant rheology, elastohydrodynamic lubrication and the effects of surface roughness and particulate contamination in the lubricant on the overall behaviour of a heavily loaded lubricated contact. One of the aims of the book is to make clear to the reader that a Newtonian model for the lubricant behaviour does not have enough degrees of freedom to be able to describe the friction - traction behaviour of heavily loaded lubricated contacts or the oil film build-up and collapse under surface asperities for rough surfaces. The book contains quite a lot of experimental data of lubricants at high pressures, both solidification pressures, compressibilities and shear strength increase coefficients, which make it possible to estimate the friction and power loss in heavily loaded lubricated contacts for different pressures, temperatures, sliding speeds, and lubricant types. This is the first time that data of this type has been included in a textbook and it is hoped that the questions highlighted will serve to initiate and guide future research in this field.
Book Synopsis The High Shear Stress Rheology of Liquid Lubricants at Pressures of 2 to 200 MPa by : Scott S. Bair
Download or read book The High Shear Stress Rheology of Liquid Lubricants at Pressures of 2 to 200 MPa written by Scott S. Bair and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The steady shear flow characteristics of two liquid lubricants were measured in a new rheometer at shear stresses to 10 MPa. All measurements were performed well below the glass transition pressure. Both Newtonian and rate-independent (limiting shear stress) behaivor was observed.
Author :ASTM Task Force DO2.O7.OB TF/EC on the Correlation of High-Temperature Oil Rheology with Engine Performance Publisher :ASTM International ISBN 13 : Total Pages :114 pages Book Rating :4.:/5 (318 download)
Book Synopsis The Relationship Between High-temperature Oil Rheology and Engine Operation by : ASTM Task Force DO2.O7.OB TF/EC on the Correlation of High-Temperature Oil Rheology with Engine Performance
Download or read book The Relationship Between High-temperature Oil Rheology and Engine Operation written by ASTM Task Force DO2.O7.OB TF/EC on the Correlation of High-Temperature Oil Rheology with Engine Performance and published by ASTM International. This book was released on 1985 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proprietes Rheologiques Des Lubrifiants by : Jean Briant
Download or read book Proprietes Rheologiques Des Lubrifiants written by Jean Briant and published by Editions TECHNIP. This book was released on 1989 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, SIld disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna and broader dissemination. tional publishing house to assure improved service Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 30 (thesis year 1985) a total of 12,400 theses titles from 26 Canadian and 186 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work.
Book Synopsis High Pressure Rheology for Quantitative Elastohydrodynamics by : Scott S. Bair
Download or read book High Pressure Rheology for Quantitative Elastohydrodynamics written by Scott S. Bair and published by Elsevier. This book was released on 2007-04-13 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational elastohydrodynamics, a part of tribology, has existed happily enough for about fifty years without the use of accurate models for the rheology of the liquids used as lubricants. For low molecular weight liquids, such as low viscosity mineral oils, it has been possible to calculate, with precision, the film thickness in a concentrated contact provided that the pressure and temperature are relatively low, even when the pressure variation of viscosity is not accurately modelled in detail. Other successes have been more qualitative in nature, using effective properties which come from the fitting of parameters used in calculations to experimental measurements of the contact behaviour, friction or film thickness. High Pressure Rheology for Quantitative Elastohydrodynamics is intended to provide a sufficiently accurate framework for the rheology of liquids at elevated pressure that it may be possible for computational elastohydrodynamics to discover the relationships between the behaviour of a lubricated concentrated contact and the measurable properties of the liquid lubricant. The required high-pressure measurement techniques are revealed in detail and data are presented for chemically well-defined liquids that may be used as quantitative reference materials. * Presents the property relations required for a quantitative calculation of the tribological behaviour of lubricated concentrated contacts. * Details of high-pressure experimental techniques. * Complete description of the pressure and temperature dependence of viscosity for high pressures. * Some little-known limitations on EHL modelling.
Book Synopsis Low Temperature Lubricant Rheology Measurement and Relevance to Engine Operation by : Robert B. Rhodes
Download or read book Low Temperature Lubricant Rheology Measurement and Relevance to Engine Operation written by Robert B. Rhodes and published by ASTM International. This book was released on 1992 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers were presented at a symposium held in Austin, Texas, in December 1991. Subjects include a history of ASTM accomplishments in low temperature engine oil rheology from 1966-1992, critical aspects of pumping viscosity by mini-rotary viscometer, the scanning Brookfield technique of low temperatur
Book Synopsis Rheological Characterization of Lubricants in Automotive Industries Through Development of a Novel Capillary Breakup Extensional Rheometer by : Jianyi Du (S.M.)
Download or read book Rheological Characterization of Lubricants in Automotive Industries Through Development of a Novel Capillary Breakup Extensional Rheometer written by Jianyi Du (S.M.) and published by . This book was released on 2018 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensional rheology describes the response of fluids to elongational deformations, which is important to everyday phenomena such as jetting, drop impact and fragmentation. This thesis describes the development of an improved device to study the extensional rheology of complex fluids such as paints, motor oils, metalworking lubricants and waxes frequently used in the automotive industry. Key processes in the automotive industry can be potentially optimized with a better understanding of the rheology of these materials, including paint spray, auto-body coating, engine lubrication, and other processes involving high deformation rates. The experimental technique of capillary thinning is utilized for characterizing the fluids and an improved design of the Capillary Breakup Extensional Rheometer (CaBER) is introduced. The new instrument features higher resolution and faster sampling of the laser micrometer measurements, better controlled motor actuation, a novel environmental temperature control system as well as customized fixtures to facilitate the experiments. In this experimental setup, a liquid sample is rapidly stretched between two coaxial plates, which leads to the formation of a liquid bridge in the middle connecting hemispherical liquid reservoirs at each end. The temporal evolution of the radius of the resulting liquid bridge is controlled by inertial, viscous, elastic and capillary effects. By measuring the evolution in the mid-plane radius and the shape of the filament using a laser micrometer as well as a high-speed camera with a well-established image processing algorithm, we can probe the underlying fluid properties given specific constitutive models. The new extensional rheometer is validated using a number of different fluid systems, including a rheologically well-studied Newtonian calibration fluid of glycerol and a series of aqueous food thickeners. Exploratory tests also show the capabilities and limitations of the device through a series of calibration oils with distinct fluid properties. Three different materials used in automotive industries are tested. First, two commercially available motor oils with the same viscosity index (1OW-30) appearing identical in shear flow, as well as having similar surface tensions are selected. Capillary thinning measurements show that these fluids can be differentiated by the onset of strain-rate-thickening close to breakup, corresponding to the dimensionless Weissenberg number exceeding Wi ~\~ 0.5. This weakly elastic response for each lubricant can be modeled and understood using a simple second order fluid model, which is then numerically fit with the experimental data. Compared with the model parameters obtained from fitting the Newtonian and Hookean dumbbell models, consistency is observed in material properties including the extensional viscosities and the relaxation time, thus showing a smooth transition of the rheological characteristics as the filament profile evolves and the strain rate in the sample diverges. Second, a commercial waxy lubricant (DC-290) for the metal stamping process is selected. This material is first characterized through surface tension measurements, differential scanning calorimetry and shear rheometry to determine the onset of wax precipitation (at a wax appearance temperature of 47°C). Below this wax appearance temperature, the material shows a series of non-Newtonian behaviors, including a non-trivial yield stress, shear-thinning and thixotropic effects with dependence on temperature, shear rate and shear-history. These characterizations are further connected to the capillary thinning profiles inspected at different temperatures, demonstrating a transition from a stable liquid bridge that never breaks up due to the existence of a yield stress, to the inertio-capillary thinning profile resulting in liquid bridge corrugations and droplet formation. For a specific temperature of 40°C, the experimental diameter thinning at the mid-plane shows better correspondence to the prediction obtained from considering inertia-visco-capillary interactions than that obtained from only considering visco-capillary interactions or potential flow limit. Some discrepancies between the experimental results and the inertia-visco-capillary prediction still exist and relate to the yield stress. Finally, another commercial liquid lubricant (FC-6130), which was first independently characterized to be a low viscosity Newtonian fluid through shear rheometry, is examined using capillary thinning to determine the limits of the instrument. A variant of the capillary thinning technique, known as the slow retraction method (SRM) was applied using a smaller plate geometry in an attempt to minimize inertial as well as gravitational effects on the liquid bridge which adversely affect the accuracy of measurements for low viscosity materials. The resulting thinning profile close to breakup shows good correspondence to the prediction from visco-capillary interactions, indicating a purely viscous Newtonian response. The results from these experiments show the capabilities of the new capillary thinning system, and also reveal new strategies to characterize the extensional rheological properties of viscoelastic or weakly viscoelastic materials of relevance in the automotive industries. A deeper understanding of these materials will help in optimizing the industrial processes in which they are applied.
Book Synopsis Journal of Lubrication Technology by :
Download or read book Journal of Lubrication Technology written by and published by . This book was released on 1996 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lubricants and Lubrication by : G. Dalmaz
Download or read book Lubricants and Lubrication written by G. Dalmaz and published by Elsevier. This book was released on 1995-10-05 with total page 709 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings review progress in the development of lubricants and in the understanding of the phenomena of lubrication. The contents include papers on the impact of automotive technology and environmental factors upon lubricant requirements, elasto-hydrodynamic lubrication, boundary lubrication, machine elements, bio-tribology, metal forming, rheology, lubricated wear and very thin film (nano metre) lubrication. Presented by leading scientists from 22 different countries, these proceedings provide an up-to-date review of developments in this field.
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonequilibrium Molecular Dynamics by : Billy D. Todd
Download or read book Nonequilibrium Molecular Dynamics written by Billy D. Todd and published by Cambridge University Press. This book was released on 2017-03-10 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: This coherent collection of theory, algorithms, and illustrative results presents the field of nonequilibrium molecular dynamics in detail.
Book Synopsis CRC Handbook of Lubrication by : Robert W. Bruce
Download or read book CRC Handbook of Lubrication written by Robert W. Bruce and published by CRC Press. This book was released on 2010-12-12 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook covers the general area of lubrication and tribology in all its facets: friction, wear lubricants (liquid, solid, and gas), greases, lubrication principles, applications to various mechanisms, design principles of devices incorporating lubrication, maintenance, lubrication scheduling, and standardized tests; as well as environmental problems and conservation. The information contained in these two volumes will aid in achieving effective lubrication for control of friction and wear, and is another step to improve understanding of the complex factors involved in tribology. Both metric and English units are provided throughout both volumes.
Author :ASTM Committee D-2 on Petroleum Products and Lubricants. Subcommittee D02.07 on Flow Properties Publisher : ISBN 13 : Total Pages :18 pages Book Rating :4.0/5 ( download)
Book Synopsis Standard Test Method for Measuring Apparent Viscosity by Capillary Viscometer at High Temperature and High-shear Rates by : ASTM Committee D-2 on Petroleum Products and Lubricants. Subcommittee D02.07 on Flow Properties
Download or read book Standard Test Method for Measuring Apparent Viscosity by Capillary Viscometer at High Temperature and High-shear Rates written by ASTM Committee D-2 on Petroleum Products and Lubricants. Subcommittee D02.07 on Flow Properties and published by . This book was released on 1993 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: