Notions fondamentales sur le frottement, l'usure, la lubrification et la technologie des surfaces PDF Download
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Author: Jean-Jacques Milan
Publisher:
ISBN:
Category :
Languages : fr
Pages : 265
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Book Description
Author: Jean-Jacques Milan
Publisher:
ISBN:
Category :
Languages : fr
Pages : 265
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Book Description
Author: Jean-Marie Georges
Publisher:
ISBN: 9782212058239
Category :
Languages : fr
Pages : 424
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Book Description
Les phénomènes de frottement, d'usure et de lubrification, de même que les propriétés d'adhérence des matériaux entrent en jeu dans de nombreux domaines industriels, en particulier dans les secteurs où les enjeux de conservation d'énergie ou de fiabilité des systèmes et des équipements interviennent de façon cruciale. La tribologie, discipline qui traite de ces phénomènes, est une science pluridisciplinaire s'appuyant à la fois sur les bases fondamentales de la mécanique et sur les acquis récents de la science des matériaux. Elle s'intéresse à des phénomènes dont l'échelle varie de la dimension d'une machine à celle des liaisons atomiques et qui relèvent tant de la physique des solides que de la physico-chimie des surfaces. Destiné aux étudiants de deuxième et troisième cycles universitaires, aux élèves des écoles d'ingénieurs, à la formation par la recherche ainsi qu'aux praticiens chargés de la fabrication et de la maintenance des équipements, l'ouvrage de Jean-Marie Georges propose une méthode globale d'étude des problèmes de tribologie. Celle-ci passe par l'analyse mécanique macroscopique des systèmes et l'identification du type de déformation qui affecte les corps en contact. Un important développement est également consacré à l'apport de la physico-chimie des interfaces ainsi qu'aux notions d'énergie de surface, de mouillage et d'adhésion. Finalement, des modèles moléculaires sont présentés, qui rendent compte de l'origine des forces de frottement et de l'usure chimique des matériaux.
Author: I.L. Singer
Publisher: Springer Science & Business Media
ISBN: 9401128111
Category : Science
Languages : en
Pages : 638
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Book Description
Fundamentals of Friction, unlike many books on tribology, is devoted to one specific topic: friction. After introductory chapters on scientific and engineering perspectives, the next section contains the necessary background within the areas of contact mechanics, surfaces and adhesion. Then on to fracture, deformation and interface shear, from the macroscopic behavior of materials in frictional contact to microscopic models of uniform and granular interfaces. Lubrication by solids, liquids and gases is presented next, from classical flow properties to the reorganization of monolayers of molecules under normal and shear stresses. A section on new approaches at the nano- and atomic scales covers the physics and chemistry of interfaces, an array of visually exciting simulations, using molecular dynamics, of solids and liquids in sliding contact, and related AFM/STM studies. Following a section on machines and measurements, the final chapter discusses future issues in friction.
Author: Frank Philip Bowden
Publisher: Oxford University Press
ISBN: 9780198507772
Category : Science
Languages : en
Pages : 432
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Book Description
This classic work, originally published in 1950, was a landmark in the development of the subject of tribology. When it was first published, one reviewer wrote that it 'marks the beginning of a new epoch in the study of friction and lubrication .... The most interesting and comprehensive work on a single branch of physics I have ever read.' For the 1986 reprint David Tabor wrote a new preface, reviewing developments in the subject in the 36 years since the book first appeared. He has also added an appreciation of the life and work of F.P. Bowden, who died in 1968.
Author: Enrico Gnecco
Publisher: Springer Science & Business Media
ISBN: 3540368078
Category : Science
Languages : en
Pages : 713
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Book Description
Readers of this book will become familiar with the concepts and techniques of nanotribology, explained by an international team of scientists and engineers, actively involved and with long experience in this field. Edited by two pioneers in the field, the book is suitable both as a first introduction to this fascinating subject, and also as a reference for researchers wishing to improve their knowledge of nanotribology.
Author: Ernest Rabinowicz
Publisher: John Wiley & Sons
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 264
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Book Description
Friction and Wear of Materials Second Edition Written by one of the world's foremost authorities on friction, this classic book offers a lucid presentation of the theory of mechanical surface interactions as it applies to friction, wear, adhesion, and boundary lubrication. To aid engineers in design decisions, Friction and Wear of Materials evaluates the properties of materials which, under specified conditions, cause one material to function better as a bearing material than another. Featured also are thorough treatments of lubricants and the sizes and shapes of wear particles. This updated Second Edition includes new material on erosive wear, impact wear, and friction. Professor Rabinowicz's book will be especially welcomed by mechanical and design engineers, surface scientists, tribologists and others who design, produce and operate products, machines and equipment which involve friction and its effects.
Author:
Publisher:
ISBN: 9780803168312
Category : Lubricating oils
Languages : en
Pages : 22
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Book Description
THIS CHAPTER DEALS WITH THE FUNDAMENTALS of lubrication. It covers the lubricant functions, nature and composition of the lubricants market, concepts of friction, lubrication, viscosity, and wear, lubricant types, and lubricant selection, performance specifications, and composition. A brief description of the lubricant classes and additives is also provided. The concepts addressed in this chapter are invaluable in understanding the modern lubricant technology and the material covered in the subsequent chapters. Almost all modern machines require the use of a lubricant. Power generation in such equipment is achieved by the use of engines that mostly comprise metal parts that move against one another. In many cases, there is metal-to-metal contact that leads to the generation of friction and heat, which results in wear. The extent of wear in equipment depends upon the degree of the metal-to-metal contact, either due to the equipment design or the nature of the operation. For example, the equipment that is designed to experience minimal metal-to-metal contact, as is the case in most parts of an internal combustion engine, there is little friction and wear. However; the parts that are designed to have intimate metal-to-metal contact, such as gears and bearings, wear due to friction is extensive. With respect to the effect of equipment operation on wear, high-speed, low-load operation leads to lower wear than slow-speed, high-load operation. This is because in the former case there is minimal metal-to-metal contact. A lubricant can be a solid, liquid, or gas, and lubrication is its primary function. The usual objective of the lubrication is to lubricate surfaces to minimize direct metal-to-metal contact and, hence, reduce friction and wear. The term lubricant is also loosely applied to many other fluids that do not specifically perform this function. Examples include power and heat transmission fluids, hydraulic fluids, dielectric fluids, process oils, and the others. Incidentally, in this book the term lubricant pertains to a finished lubricant, that is, it comprises base fluid and additives. A lubricant performs many diverse functions, which help protect and prolong the life of the equipment [1]. These include the following: 1. Lubrication (reduce friction and wear)Lubricant helps reduce friction and wear by introducing a lubricating film between mechanical moving parts, such as gears and bearings. Essentially the presence of a lubricating film minimizes the metal-to-metal contact and reduces the force necessary to move one surface against the other, thereby reducing wear and saving energy. 2. Cooling (heat transfer)Lubricant acts as a heat sink and dissipates the heat away from the critical moving parts of the equipment, thereby decreasing the possibility of the machine component deformation and wear. The heat is either frictional heat that results from the metal surfaces rubbing against one another, such as in gears, or is conducted and radiated heat, which is due to the close proximity of the parts to a combustion source, such as the combustion chamber in an automobile engine. 3. Cleaning and SuspendingLubricant facilitates smooth operation of the equipment by removing and suspending potentially harmful products, such as carbon, sludge, and varnish, and the other materials, such as dirt and wear debris. This lubricant function is important in operations that involve high operating temperatures, as in the case of an internal combustion engine or a transmission. This is because in these applications the lubricant gets oxidized to form deposit precursors that can separate on hot surfaces and get converted into deposits. 4. ProtectionLubricant prevents metal damage due to oxidation products, corrosion, and wear. It achieves this by forming a physical film on metal surfaces that is impervious to oxygen, water, and acids, or by forming physical and chemical films by additives, such as rust and corrosion inhibitors, extreme-pressure (EP) additives, and anti-wear agents, that are present in the lubricant. 5. Transfer PowerLubricant is used as a power transfer medium in some applications, for example, in hydraulic systems. The lubricant performs this function in addition to its normal function of lubrication. Examples of equipment that use hydraulics technology include transmissions, circulating systems, lifts used in automotive service stations, log splitters, fork lifts, dump trucks, and underground continuous mining equipment such as drills, loaders, and miners.
Author: Eric Reeves Braithwaite
Publisher:
ISBN:
Category : Lubrication and lubricants
Languages : en
Pages : 312
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Book Description
Author: Jane Wang
Publisher: CRC Press
ISBN: 0429526210
Category : Technology & Engineering
Languages : en
Pages : 1005
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Book Description
Understanding the characteristics of material contact and lubrication at tribological interfaces is of great importance to engineering researchers and machine designers. Traditionally, contact and lubrication are separately studied due to technical difficulties, although they often coexist in reality and they are actually on the same physical ground. Fast research advancements in recent years have enabled the development and application of unified models and numerical approaches to simulate contact and lubrication, merging their studies into the domain of Interfacial Mechanics. This book provides updated information based on recent research progresses in related areas, which includes new concepts, theories, methods, and results for contact and lubrication problems involving elastic or inelastic materials, homogeneous or inhomogeneous contacting bodies, using stochastic or deterministic models for dealing with rough surfaces. It also contains unified models and numerical methods for mixed lubrication studies, analyses of interfacial frictional and thermal behaviors, as well as theories for studying the effects of multiple fields on interfacial characteristics. The book intends to reflect the recent trends of research by focusing on numerical simulation and problem solving techniques for practical interfaces of engineered surfaces and materials. This book is written primarily for graduate and senior undergraduate students, engineers, and researchers in the fields of tribology, lubrication, surface engineering, materials science and engineering, and mechanical engineering.
Author: Kenneth C. Ludema
Publisher: CRC Press
ISBN: 9781482210170
Category : Tribology
Languages : en
Pages : 0
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Book Description
This bestseller adds more on surface characterization and recent advances in the field. It offers additional descriptions of common testing methods, including diagrams and surface texturing for enhanced lubrication, and more information on rolling element bearings. It explores surface profile characterization and elastic plastic contact mechanics.
