Sliding Friction

Author: Bo Persson
Publisher: Springer Science & Business Media
ISBN: 9783662042830
Release Date: 2013-03-14
Genre: Science

The ability to produce durable low-friction surfaces and lubricant fluids has become an important factor in the miniaturization of moving components in many technological devices, e.g., magnetic storage, recording systems, miniature motors and many aerospace components. This book will be useful to physicists, chemists, materials scientists, and engineers who need to understand sliding friction. This second edition covers several new topics including friction on superconductors, simulations of the layering transition, nanoindentation, wear in combustion engines, rolling and sliding of carbon nanotubes, and the friction dynamics of granular materials.

Physics of Sliding Friction

Author: Bo Persson
Publisher: Springer Science & Business Media
ISBN: 9789401587051
Release Date: 2013-04-17
Genre: Science

The study of sliding friction is one of the oldest problems in physics, and certainly one of the most important from a practical point of view. Low-friction surfaces are in increasingly high demand for high-tech components such as computer storage systems, miniature motors, and aerospace devices. It has been estimated that about 5% of the gross national product in the developed countries is "wasted" on friction and the related wear. In spite of this, remarkable little is understood about the fundamental, microscopic processes responsible for friction and wear. The topic of interfacial sliding has experienced a major burst of in terest and activity since 1987, much of which has developed quite independently and spontaneously. This volume contains contributions from leading scientists on fundamental aspects of sliding friction. Some problems considered are: What is the origin of stick-and-slip motion? What is the origin of the rapid processes taking place within a lub at low sliding velocities? On a metallic surface, is the rication layer electronic or phononic friction the dominating energy dissipation pro cess? What is the role (if any) of self-organized criticality in sliding friction? How thick is the water layer during sliding on ice and snow? These and other questions raised in this book are of course only part ly answered: the topic of sliding friction is still in an early state of development.

Investigation on the Dry Sliding Friction and Wear Behavior of AA6351 SiC B4C Hybrid Metal Matrix Composites

ISBN: OCLC:1032124660
Release Date: 2014

In the present study, the effect of wear test parameters on dry sliding wear behavior of aluminum matrix alloy (AA6351) with 5 wt% silicon carbide and 5 wt% boron carbide-reinforced hybrid metal matrix composites was investigated. Wear performance of the hybrid composites was evaluated over an applied load range of 20–100 N and sliding velocities ranging from 1 to 5 m/s. The experimental results show that the hybrid composites retain the wear resistance properties up to load of 60 N and sliding velocities ranges 1–3 m/s. Metallurgical examinations were also carried out to assess the effect of silicon carbide and boron carbide particles on the wear mechanisms. The enhancement of wear resistance was achieved with the addition of small amount of silicon carbide and boron carbide reinforcement particles with aluminum matrix alloy.

Qualitative Analysis of Nonsmooth Dynamics

Author: Alain Léger
Publisher: Elsevier
ISBN: 9780081012017
Release Date: 2016-04-26
Genre: Technology & Engineering

Qualitative Analysis of Nonsmooth Dynamics: A Simple Discrete System with Unilateral Contact and Coulomb Friction explores the effects of small and large deformations to understand how shocks, sliding, and stick phases affect the trajectories of mechanical systems. By analyzing these non-regularities successively this work explores the set of equilibria and properties of periodic solutions of elementary mechanical systems, where no classical results issued from the theory of ordinary differential equations are readily available, such as stability, continuation or approximation of solutions. The authors focus on unilateral contact in presence of Coulomb friction and show, in particular, how any regularization would greatly simplify the mathematics but lead to unacceptable physical responses. Explores the effects of small and large deformations to understand how shocks, sliding, and stick phases affect the trajectories of mechanical systems Includes theoretical results concerning the full investigation of the behavior under constant or oscillating loadings, even in the case of the simplest mechanical systems Provides a focus on unilateral contact in presence of Coulomb friction Helps you gain an accurate understanding of how the transition occurs to ensure the safe use of any machine involving rotating or sliding mechanisms

Friction Induced Vibrations and Self Organization

Author: Michael Nosonovsky
Publisher: CRC Press
ISBN: 9781466504042
Release Date: 2013-08-09
Genre: Science

Many scientists and engineers do not realize that, under certain conditions, friction can lead to the formation of new structures at the interface, including in situ tribofilms and various patterns. In turn, these structures—usually formed by destabilization of the stationary sliding regime—can lead to the reduction of friction and wear. Friction-Induced Vibrations and Self-Organization: Mechanics and Non-Equilibrium Thermodynamics of Sliding Contact combines the mechanical and thermodynamic methods in tribology, thus extending the field of mechanical friction-induced vibrations to non-mechanical instabilities and self-organization processes at the frictional interface. The book also relates friction-induced self-organization to novel biomimetic materials, such as self-lubricating, self-cleaning, and self-healing materials. Explore Friction from a Different Angle—as a Fundamental Force of Nature The book begins with an exploration of friction as a fundamental force of nature throughout the history of science. It then introduces general concepts related to vibrations, instabilities, and self-organization in the bulk of materials and at the interface. After presenting the principles of non-equilibrium thermodynamics as they apply to the interface, the book formulates the laws of friction and highlights important implications. The authors also analyze wear and lubrication. They then turn their attention to various types of friction-induced vibration, and practical situations and applications where these vibrations are important. The final chapters consider various types of friction-induced self-organization and how these effects can be used for novel self-lubricating, self-cleaning, and self-healing materials. From Frictional Instabilities to Friction-Induced Self-Organization Drawing on the authors’ original research, this book presents a new, twenty-first century perspective on friction and tribology. It shows how friction-induced instabilities and vibrations can lead to self-organized structures, and how understanding the structure–property relationships that lead to self-organization is key to designing "smart" biomimetic materials.

Fundamentals of Friction

Author: I.L. Singer
Publisher: Springer Science & Business Media
ISBN: 9789401128117
Release Date: 2012-12-06
Genre: Science

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.

Physics and Chemistry of Interfaces

Author: Hans-Jürgen Butt
Publisher: John Wiley & Sons
ISBN: 9783527606405
Release Date: 2006-03-06
Genre: Science

Serving as a general introduction to surface and interface science, this book focuses on basic concepts rather than specific details, and on intuitive understanding rather than merely learning facts. The text reflects the fact that the physics and chemistry of surfaces is a diverse area of research that involves classical scientific and engineering disciplines. As such, it discusses fundamental subjects, such as thermodynamics of interfaces, as well as applied topics including wetting, friction, and lubrication. Following an introduction to the most important techniques and methods, readers will be able to apply simple models to their own scientific problems. Furthermore, manifold high end technological applications are shown together with the basic scientific treatment, for example AFM, surface technology, biotechnology, microelectronics, and biomaterials. The book is written with advanced students of chemistry, physics, materials science, chemical engineering and related subjects who have a basic knowledge of natural sciences and mathematics in mind. In addition, scientists and engineers who are not yet specialists in surface science but want to learn more about this important subject will equally benefit.

Kinematics and Dynamics of Multibody Systems with Imperfect Joints

Author: Paulo Flores
Publisher: Springer Science & Business Media
ISBN: 3540743618
Release Date: 2008-01-10
Genre: Technology & Engineering

This book presents suitable methodologies for the dynamic analysis of multibody mechanical systems with joints. It contains studies and case studies of real and imperfect joints. The book is intended for researchers, engineers, and graduate students in applied and computational mechanics.