On the Role of Surface Roughness in Elastohydrodynamic Lubrication of Tribological Components PDF Download
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Author: Mohammad Masjedi
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Mohammad Masjedi
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Chunyan Yang
Publisher: Forschungszentrum Jülich
ISBN: 3893365370
Category :
Languages : en
Pages : 181
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Book Description
Author: B.O. Jacobson
Publisher: Elsevier
ISBN: 0080875831
Category : Science
Languages : en
Pages : 399
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Book Description
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.
Author: R Gohar
Publisher: World Scientific Publishing Company
ISBN: 1911299344
Category : Technology & Engineering
Languages : en
Pages : 418
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Book Description
There are many occasions when quick solutions to problems in tribology are needed. For example, an understanding of the lubrication mechanism in a racing car engine has led to an improvement in performance. Why does a woman's face cream make her look younger for a time? Tribologists are frequently summoned in legal cases as expert witnesses after people have slipped in public places. Improvements to the human artificial hip joint are also partly a result of extensive tribology research. In order to solve such problems, tribology should be regarded as an important undergraduate course. This book covers tribology in such a way as to provide simple approximate solutions to frequent practical problems. Unlike previous books, which catered for earlier generations of undergraduates, today's students generally have sophisticated computer systems available in their colleges. Therefore, many of the worked and set examples in the book are made easier by using readily available software such as Math CAD. Readers will thus gain practice in using it, and will benefit in general by understanding the mathematical principles involved in the solutions. This book is particularly useful to engineering undergraduates and practicing engineers needing a quick solution to tribological problems. Contents:Introduction to TribologyThe Nature of Rough SurfacesElastic Solids in Normal ContactDry Friction and WearLubricant PropertiesThe Reynolds and Energy EquationsThrust BearingsJournal BearingsExternally Pressurized (EP) BearingsElastohydrodynamic Lubrication (EHL)Fatigue Life of Rolling Element BearingsTransient Elastohydrodynamic LubricationNano-TribologyBio-Tribology Readership: Advanced undergraduates and PhD students starting their research; practicing engineers and scientists in industry.
Author: D. Dowson
Publisher: Elsevier
ISBN: 1483181898
Category : Technology & Engineering
Languages : en
Pages : 254
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Book Description
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: Steve M. Rohde
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 228
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Book Description
Author: William R. Loomis
Publisher: William Andrew
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 880
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Book Description
Author: Desmond F. Moore
Publisher: Elsevier
ISBN: 1483157288
Category : Technology & Engineering
Languages : en
Pages : 401
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Book Description
Principles and Applications of Tribology provides a mechanical engineering perspective of the fundamental understanding and applications of tribology. This book is organized into two parts encompassing 16 chapters that cover the principles of friction and different types of lubrication. Chapter 1 deals with the immense scope of tribology and the range of applications in the existing technology, and Chapter 2 is devoted entirely to the evaluation and measurement of surface texture. Chapters 3 to 5 present the fundamental concepts underlying the friction of metals, elastomers, and other materials. The principles of hydrodynamic lubrication are briefly discussed in Chapter 6, and the mechanisms of boundary and elastohydrodynamic lubrication are examined in Chapters 7 and 8. Chapter 9 is a generalized treatise on wear and abrasion phenomena in metals and elastomers, whereas Chapter 10 deals with the internal friction in solids, liquids, and gases. Chapter 11 is an abbreviated yet thorough treatment of experimental methods used in tribological studies. The remaining five chapters in this book are devoted to specific applications, including manufacturing processes, automotive applications, transportation, locomotion, bearing design, and miscellaneous. This book is an ideal source for mechanical engineering students.
Author: L. Flamand
Publisher: Elsevier
ISBN: 0080543286
Category : Technology & Engineering
Languages : en
Pages : 593
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Book Description
The 24th Leeds-Lyon Symposium was held in London from 4th-6th September 1997, where it was hosted by the Imperial College of Science, Technology and Medicine. The meeting addressed the topic of "Tribology for Energy Conservation" and attracted a wide range of stimulating papers and speakers. Some 150 delegates from nineteen countries attended and about sixty papers were presented in fifteen sessions. These covered the topics of lubricants, wear, friction reduction, hydrodynamics, elastohydrodynamic lubrication, surface roughness, manufacturing, component life (including condition monitoring), and automotive aspects.
Author: D. Dowson
Publisher: Elsevier
ISBN: 0080543278
Category : Technology & Engineering
Languages : en
Pages : 941
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Book Description
These papers represent the proceedings from the 29th Leeds-Lyon Symposium on Tribology, 'Tribological Research and Design for Engineering Systems' which was held in September 2002. Over 130 delegates from 18 countries attended the symposium, and the extensive discussions generated over 150 written questions and responses, which are documented at the end of this proceedings volume. There have been many advances in the field of tribology in recent years, with progress being made in the engineering and interaction of surfaces; micro and nano-tribology; elastohydrodynamics; surface films; surface texture; tribochemistry; wear and life prediction; with both experimental and theoretical contributions. These advances were reviewed, and the impact of this understanding on the fundamentals upon total engineering activity in design, manufacture and machine operation were considered. Readership: Scientists and researchers in the field of tribology.
