High Pressure Rheology For Quantitative Elastohydrodynamics

Author : Scott S. Bair
Publisher : Elsevier
Page : 388 pages
File Size : 52,7 Mb
Release : 2019-04-18
Category : Technology & Engineering
ISBN : 9780128163108

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High Pressure Rheology for Quantitative Elastohydrodynamics by Scott S. Bair Pdf

High-Pressure Rheology for Quantitative Elastohydrodynamics, Second Edition, contains updated sections on scaling laws and thermal effects, including new sections on the importance of the pressure dependence of viscosity, the role of the localization limit of stress, and new material on the shear dependence of viscosity and temperature dependence viscosity. Since publication of the original edition, the experimental methods, the resulting property data and new correlations have resulted in a revolution in understanding of the mechanisms of film formation and the mechanical dissipation. Describes lubricant rheology and dependence of lubricant viscosity and density on pressure and temperature Provides a detailed description of the relationship of lubricant properties on pressure, temperature and shear stress Includes data for many more liquids, including the recently characterized reference liquids

Author : Scott S Bair
Publisher : Elsevier
Page : 260 pages
File Size : 46,5 Mb
Release : 2007-03-06
Category : Technology & Engineering
ISBN : 0080475302

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High Pressure Rheology for Quantitative Elastohydrodynamics by Scott S Bair Pdf

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.

Author : Crispulo Gallegos
Publisher : EOLSS Publications
Page : 498 pages
File Size : 53,9 Mb
Release : 2010-11-30
Category : Electronic
ISBN : 9781848263192

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Rheology - Volume I by Crispulo Gallegos Pdf

Rheology is a component of Encyclopedia of Chemical Sciences, Engineering and Technology Resources in the global Encyclopedia of Life Support Systems (EOLSS), which is an integrated compendium of twenty Encyclopedias. Rheology is the study of the flow of matter. It is classified as a physics discipline and focuses on substances that do not maintain a constant viscosity or state of flow. That can involve liquids, soft solids and solids that are under conditions that cause them to flow. It applies to substances which have a complex molecular structure, such as muds, sludges, suspensions, polymers and other glass formers, as well as many foods and additives, bodily fluids and other biological materials. The theme on Rheology focuses on five main areas, namely, basic concepts of rheology; rheometry; rheological materials, rheological processes and theoretical rheology. Of course, many of the chapters contain material from more than one general area. Rheology is an interdisciplinary subject which embraces many aspects of mathematics, physics, chemistry, engineering and biology. These two volumes are aimed at the following five major target audiences: University and College students Educators, Professional practitioners, Research personnel and Policy analysts, managers, and decision makers and NGOs.

Author : Piet M. Lugt
Publisher : John Wiley & Sons
Page : 472 pages
File Size : 54,8 Mb
Release : 2012-12-10
Category : Technology & Engineering
ISBN : 9781118483978

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Grease Lubrication in Rolling Bearings by Piet M. Lugt Pdf

The definitive book on the science of grease lubrication for roller and needle bearings in industrial and vehicle engineering. Grease Lubrication in Rolling Bearings provides an overview of the existing knowledge on the various aspects of grease lubrication (including lubrication systems) and the state of the art models that exist today. The book reviews the physical and chemical aspects of grease lubrication, primarily directed towards lubrication of rolling bearings. The first part of the book covers grease composition, properties and rheology, including thermal and dynamics properties. Later chapters cover the dynamics of greased bearings, including grease life, bearing life, reliability and testing. The final chapter covers lubrications systems – the systems that deliver grease to the components requiring lubrication. Grease Lubrication in Rolling Bearings: Describes the underlying physical and chemical properties of grease. Discusses the effect of load, speed, temperature, bearing geometry, bearing materials and grease type on bearing wear. Covers both bearing and grease performance, including thermo-mechanical ageing and testing methodologies. It is intended for researchers and engineers in the petro-chemical and bearing industry, industries related to this (e.g. wind turbine industry, automotive industry) and for application engineers. It will also be of interest for teaching in post-graduate courses.

Author : Anonim
Publisher : Unknown
Page : 416 pages
File Size : 49,9 Mb
Release : 2008
Category : Tribology
ISBN : UCSD:31822036916419

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Journal of Tribology by Anonim Pdf

Author : D. Dowson,G. R. Higginson
Publisher : Elsevier
Page : 254 pages
File Size : 51,5 Mb
Release : 2014-07-18
Category : Technology & Engineering
ISBN : 9781483181899

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Elasto-Hydrodynamic Lubrication by D. Dowson,G. R. Higginson Pdf

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.

Author : Ramsey Gohar
Publisher : World Scientific
Page : 474 pages
File Size : 48,5 Mb
Release : 2001
Category : Technology & Engineering
ISBN : 1860941702

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Elastohydrodynamics by Ramsey Gohar Pdf

Elastohydrodynamic lubrication (EHL) is a difficult topic, embracing several disciplines, which can cause many problems for engineers and scientists. This up-to-date volume explains the subject both theoretically and experimentally. Moreover, with a refreshing approach and using several novel techniques of application, it provides lucid coverage of new and important findings. Here, in one volume, are the results of much research over the last forty years. The author's clear explanation of the theory of EHL is authoritatively applied to a wide range of related topics, with physical explanations wherever possible. Many of the experimental techniques described were carried out at the Imperial College Lubrication Laboratory, where the application of interferometry (a means of measuring the EHL film thickness) was pioneered.

Author : Edward G. Trachman,Herbert S. Cheng
Publisher : Unknown
Page : 220 pages
File Size : 44,7 Mb
Release : 1973
Category : Fluid-film bearings
ISBN : UIUC:30112106680157

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Rheological Effects on Friction in Elastohydrodynamic Lubrication by Edward G. Trachman,Herbert S. Cheng Pdf

An analytical and experimental investigation is presented of the friction in a rolling and sliding elastohydrodynamic lubricated contact. The rheological behavior of the lubricant is described in terms of two viscoelastic models. These models represent the separate effects of non-Newtonian behavior and the transient response of the fluid. A unified description of the non-Newtonian shear rate dependence of the viscosity is presented as a new hyperbolic liquid model. The transient response of viscosity, following the rapid pressure rise encountered in the contact, is described by a compressional viscoelastic model of the volume response of a liquid to an applied pressure step. The resulting momentum and energy equations are solved by an iterative numerical technique, and a friction coefficient is calculated. The experimental study was performed, with two synthetic paraffinic lubricants, to verify the friction predictions of the analysis. The values of friction coefficient from theory and experiment are in close agreement.

Author : Q. Jane Wang,Yip-Wah Chung
Publisher : Springer
Page : 4139 pages
File Size : 50,7 Mb
Release : 2013-09-26
Category : Technology & Engineering
ISBN : 0387928987

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Encyclopedia of Tribology by Q. Jane Wang,Yip-Wah Chung Pdf

TRIBOLOGY – the study of friction, wear and lubrication – impacts almost every aspect of our daily lives. The Springer Encyclopedia of Tribology is an authoritative and comprehensive reference covering all major aspects of the science and engineering of tribology that are relevant to researchers across all engineering industries and related scientific disciplines. This is the first major reference that brings together the science, engineering and technological aspects of tribology of this breadth and scope in a single work. Developed and written by leading experts in the field, the Springer Encyclopedia of Tribology covers the fundamentals as well as advanced applications across material types, different length and time scales, and encompassing various engineering applications and technologies. Exciting new areas such as nanotribology, tribochemistry and biotribology have also been included. As a six-volume set, the Springer Encyclopedia of Tribology comprises 1630 entries written by authoritative experts in each subject area, under the guidance of an international panel of key researchers from academia, national laboratories and industry. With alphabetically-arranged entries, concept diagrams and cross-linking features, this comprehensive work provides easy access to essential information for both researchers and practicing engineers in the fields of engineering (aerospace, automotive, biomedical, chemical, electrical, and mechanical) as well as materials science, physics, and chemistry.

Author : Ramsey Gohar
Publisher : Unknown
Page : 319 pages
File Size : 42,6 Mb
Release : 1988
Category : Fluid-film bearings
ISBN : 0853128200

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Elastohydrodynamics by Ramsey Gohar Pdf

Author : Jan Mewis,Norman J. Wagner
Publisher : Cambridge University Press
Page : 417 pages
File Size : 44,5 Mb
Release : 2012
Category : Science
ISBN : 9780521515993

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Colloidal Suspension Rheology by Jan Mewis,Norman J. Wagner Pdf

Presented in an accessible and introductory manner, this is the first book devoted to the comprehensive study of colloidal suspensions.

Author : Billy D. Todd,Peter J. Daivis
Publisher : Cambridge University Press
Page : 371 pages
File Size : 49,7 Mb
Release : 2017-03-10
Category : Science
ISBN : 9780521190091

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Nonequilibrium Molecular Dynamics by Billy D. Todd,Peter J. Daivis Pdf

This coherent collection of theory, algorithms, and illustrative results presents the field of nonequilibrium molecular dynamics in detail.

Author : William Murphy,Jonathan Black,Garth Hastings
Publisher : Springer
Page : 676 pages
File Size : 55,9 Mb
Release : 2016-06-11
Category : Technology & Engineering
ISBN : 9781493933051

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Handbook of Biomaterial Properties by William Murphy,Jonathan Black,Garth Hastings Pdf

This book provides tabular and text data relating to normal and diseased tissue materials and materials used in medical devices. Comprehensive and practical for students, researchers, engineers, and practicing physicians who use implants, this book considers the materials aspects of both implantable materials and natural tissues and fluids. Examples of materials and topics covered include titanium, elastomers, degradable biomaterials, composites, scaffold materials for tissue engineering, dental implants, sterilization effects on material properties, metallic alloys, and much more. Each chapter author considers the intrinsic and interactive properties of biomaterials, as well as their appropriate applications and historical contexts. Now in an updated second edition, this book also contains two new chapters on the cornea and on vocal folds, as well as updated insights, data, and citations for several chapters.

Author : Michel Cloitre
Publisher : Springer
Page : 250 pages
File Size : 50,6 Mb
Release : 2010-11-10
Category : Technology & Engineering
ISBN : 9783642163821

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High Solid Dispersions by Michel Cloitre Pdf

From Polymers to Colloids: Engineering the Dynamic Properties of Hairy Particles, by D. Vlassopoulos and G. Fytas * Nonlinear Rheological Properties of Dense Colloidal Dispersions Close to a Glass Transition Under Steady Shear, by M. Fuchs * Micromechanics of Soft Particle Glasses, by R. T. Bonnecaze and M. Cloitre * Quantitative Imaging of Concentrated Suspensions Under Flow, by L. Isa, R. Besseling, A. B. Schofield and W. C. K. Poon * Soft and Wet Materials: From Hydrogels to Biotissues, by J. P. Gong and Y. Osada

Author : Rahnejat Homer,Gohar Ramsey
Publisher : World Scientific
Page : 520 pages
File Size : 52,6 Mb
Release : 1998-10-20
Category : Technology & Engineering
ISBN : 9781786345196

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Fundamentals of Tribology by Rahnejat Homer,Gohar Ramsey Pdf

Fundamentals of Tribology deals with the fundamentals of lubrication, friction and wear, as well as mechanics of contacting surfaces and their topography. It begins by introducing the reader to the importance of tribology in everyday life and offers a brief history of the subject. It then describes the nature of rough surfaces and the mechanics of contacting elastic solids and their deformation under load and friction in their relative motion. The book goes on to discuss the importance of lubricant rheology with respect to viscosity and density. Then, the principles of hydrodynamic lubrication are covered with derivations of the governing Reynolds and energy equations. Applications of hydrodynamic lubrication in various forms of bearings -- journal bearings, thrust bearings and externally pressurised bearings -- are outlined. The important and still evolving subject of elastohydrodynamic lubrication is treated in some detail, both at its fundamentals and its applications in thin shell or overlay bearings, cam-followers and internal combustion engine pistons. The fundamentals of biotribology are also covered, particularly its applications to endo-articular mammalian joints such as hip and knee joints and their arthroplasty. In addition, there is a treatment of the rapidly emerging knowledge of tribological phenomena in lightly loaded vanishing conjunctions (nanotribology), in natural systems and very small devices, such as MEMS and high density data storage media. There is also a new chapter on the rapidly emerging subject of surface texturing to promote retention of microreservoirs of lubricant, acting as microbearings and improving lubrication of otherwise poorly lubricated conjunctions. This book targets the undergraduate and postgraduate body as well as engineering professionals in industry, where often a quick solution or understanding of certain tribological fundamentals is sought. The book can also form an initial basis for those interested in research into certain aspects of tribology.