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A Model For Contact And Static Friction Of Nominally Flat And Spherical Rough Surfaces In Full Stick
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Book Synopsis A Model for Contact and Static Friction of Nominally Flat and Spherical Rough Surfaces in Full Stick by : Dvir Cohen
Download or read book A Model for Contact and Static Friction of Nominally Flat and Spherical Rough Surfaces in Full Stick written by Dvir Cohen and published by . This book was released on 2008 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Industrial Tribology by : Jitendra Kumar Katiyar
Download or read book Industrial Tribology written by Jitendra Kumar Katiyar and published by CRC Press. This book was released on 2022-11-11 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering energy-saving technologies and how these are incorporated into component design, this book is relevant to many industries, including automotive engineering, and discusses the topical issue of sustainability in industry. This book details recent fundamental developments in the field of tribology in industrial systems. Tribology has advanced significantly in recent years. Tribological performance depends on external parameters such as contact pressure at the interface, system temperature, relative speed between bodies and contact behaviour. Through ensuring that mechanisms work in an energy-efficient manner and minimizing wear, engineers should seek to implement the study of tribology to improve the life of machinery within industry. Essential to the study of component design and condition monitoring, the book touches upon topics such as gears, bearings and clutches. Additionally, it discusses tribology’s relation to Industry 4.0 and incorporates the results from cutting-edge research. Industrial Tribology: Sustainable Machinery and Industry 4.0 will be of interest to all engineers working in industry and involved in mechanical engineering, material engineering, mechanisms and component design and automotive engineering.
Download or read book Journal of Tribology written by and published by . This book was released on 2008 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Contact, Adhesion, and Static Friction of Metallic Rough Surfaces by : Wen-Ruey Chang
Download or read book Contact, Adhesion, and Static Friction of Metallic Rough Surfaces written by Wen-Ruey Chang and published by . This book was released on 1986 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Static Friction Coefficient Model for Metallic Rough Surfaces by : Wen-Ruey Chang
Download or read book Static Friction Coefficient Model for Metallic Rough Surfaces written by Wen-Ruey Chang and published by . This book was released on 1986 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonlinearities and Major Mechanisms in Presliding Friction and Energy Dissipation at Asperity-scale and Rough Surface Contacts by :
Download or read book Nonlinearities and Major Mechanisms in Presliding Friction and Energy Dissipation at Asperity-scale and Rough Surface Contacts written by and published by . This book was released on 2015 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Behavior of a system with friction at the interface is inherently nonlinear. Nonlinearities associated to interfacial mechanics primarily are the onset of sliding and energy dissipation. Firstly, to understand friction a finite element model is used to simulate sliding inception of a rigid flat on a deformable sphere under combined normal and tangential loading. Sliding inception is treated as the loss of tangential contact stiffness under combined effects of plasticity, crack propagation and interfacial slip. For fully adhered contact condition, plasticity is shown to be the dominant failure mechanism. Interplay of plasticity and interfacial slip is found to govern the onset of sliding for higher local friction coefficients. Furthermore, the single asperity results are incorporated in a statistical model of nominally flat rough surfaces under combined normal and tangential loading to investigate the stochastic effects due to surface roughness and material property uncertainties. The results show that the static coefficient of friction strongly depends on the normal load, material properties, local interfacial strength (adhesive friction component) and roughness parameters. The proposed model can be used as a measure for uncertainties that significantly influence the static friction coefficient. To investigate energy dissipation at an interface, a low cyclic tangential load is applied to obtain the hysteresis loops for the spherical model. The energy dissipation is studied under the influence of elastic mismatch, plasticity and varying phase difference between tangential and normal load. The energy losses are then correlated against the maximum tangential load as a power-law where the exponents show the degree of nonlinearity. Inducing a phase difference of 90 degrees between normal and tangential loads lead power-law exponents closer to 2; i.e., quadratic dependence of energy dissipation on tangential force. The results from the asperity scale are once again extended to the rough surface scale to study the effects of roughness parameters. The power-law exponent is found to be largely independent of roughness parameters as asperity density, asperity height distribution and fractal dimension. Achieving power-law exponents closer to 2 can be viewed as a first step in devising a predictive interfacial damping for frictional contacts.
Book Synopsis Micromechanics of Contact and Interphase Layers by : S. Stupkiewicz
Download or read book Micromechanics of Contact and Interphase Layers written by S. Stupkiewicz and published by Springer Science & Business Media. This book was released on 2007-04-16 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micromechanics provides a link between the structure and the properties at different scales of observation. This book deals with micromechanical analysis of interfaces and interface layers and presents several modelling tools. These range from the rigorous method of asymptotic expansions to practical finite element simulations, suitable for this class of problems. The corresponding two parts of the book are self-contained, so they can be read separately.
Book Synopsis Sliding Friction by : Bo N.J. Persson
Download or read book Sliding Friction written by Bo N.J. Persson and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sliding friction is one of the oldest problems in physics and certainly one of the most important from a practical point of view. 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 want to understand sliding friction. The book (or parts of it) could also form the basis for a modern undergraduate or graduate course on tribology.
Book Synopsis Contact Problems and Surface Interactions in Manufacturing and Tribological Systems by : American Society of Mechanical Engineers. Winter Annual Meeting
Download or read book Contact Problems and Surface Interactions in Manufacturing and Tribological Systems written by American Society of Mechanical Engineers. Winter Annual Meeting and published by . This book was released on 1993 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polymer Adhesion, Friction, and Lubrication by : Hongbo Zeng
Download or read book Polymer Adhesion, Friction, and Lubrication written by Hongbo Zeng and published by John Wiley & Sons. This book was released on 2013-02-07 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specifically dedicated to polymer and biopolymer systems, Polymer Adhesion, Friction, and Lubrication guides readers to the scratch, wear, and lubrication properties of polymers and the engineering applications, from biomedical research to automotive engineering. Author Hongbo Zeng details different experimental and theoretical methods used to probe static and dynamic properties of polymer materials and biomacromolecular systems. Topics include the use of atomic force microscopy (AFM) to analyze nanotribology, polymer thin films and brushes, nanoparticles, rubber and tire technology, synovial joint lubrication, adhesion in paper products, bioMEMS, and electrorheological fluids.
Book Synopsis Springer Handbook of Nanotechnology by : Bharat Bhushan
Download or read book Springer Handbook of Nanotechnology written by Bharat Bhushan and published by Springer Science & Business Media. This book was released on 2004-01-19 with total page 1232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This major work has established itself as the definitive reference in the nanoscience and nanotechnology area in one volume. In presents nanostructures, micro/nanofabrication, and micro/nanodevices. Special emphasis is on scanning probe microscopy, nanotribology and nanomechanics, molecularly thick films, industrial applications and microdevice reliability, and on social aspects. Reflecting further developments, the new edition has grown from six to eight parts. The latest information is added to fields such as bionanotechnology, nanorobotics, and NEMS/MEMS reliability. This classic reference book is orchestrated by a highly experienced editor and written by a team of distinguished experts for those learning about the field of nanotechnology.
Book Synopsis Nanotribology and Nanomechanics by : Bharat Bhushan
Download or read book Nanotribology and Nanomechanics written by Bharat Bhushan and published by Springer Science & Business Media. This book was released on 2006-01-27 with total page 1157 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent emergence and proliferation of proximal probes, e.g. SPM and AFM, and computational techniques for simulating tip-surface interactions has enabled the systematic investigation of interfacial problems on ever smaller scales, as well as created means for modifying and manipulating nanostructures. In short, they have led to the appearance of the new, interdisciplinary fields of micro/nanotribology and micro/nanomechanics. This volume serves as a timely, practical introduction to the principles of nanotribology and nanomechanics and applications to magnetic storage systems and MEMS/NEMS. Assuming some familiarity with macrotribology/mechanics, the book comprises chapters by internationally recognized experts, who integrate knowledge of the field from the mechanics and materials-science perspectives. They cover key measurement techniques, their applications, and theoretical modelling of interfaces, each beginning their contributions with macro- and progressing to microconcepts. After reviewing the fundamental experimental and theoretical aspects in the first part, Nanotribology and Nanomechanics then treats applications. Three groups of readers are likely to find this text valuable: graduate students, research workers, and practicing engineers. It can serve as the basis for a comprehensive, one- or two-semester course in scanning probe microscopy; applied scanning probe techniques; or nanotribology/nanomechanics/nanotechnology, in departments such as mechanical engineering, materials science, and applied physics. With a Foreword by Physics Nobel Laureate Gerd Binnig Dr. Bharat Bhushan is an Ohio Eminent Scholar and The Howard D. Winbigler Professor in the Department of Mechanical Engineering, Graduate Research Faculty Advisor in the Department of Materials Science and Engineering, and the Director of the Nanotribology Laboratory for Information Storage & MEMS/NEMS (NLIM) at the Ohio State University, Columbus, Ohio. He is an internationally recognized expert of tribology and mechanics on the macro- to nanoscales, and is one of the most prolific authors. He is considered by some a pioneer of the tribology and mechanics of magnetic storage devices and a leading researcher in the fields of nanotribology and nanomechanics using scanning probe microscopy and applications to micro/nanotechnology. He is the recipient of various international fellowships including the Alexander von Humboldt Research Prize for Senior Scientists, Max Planck Foundation Research Award for Outstanding Foreign Scientists, and the Fulbright Senior Scholar Award.
Book Synopsis Handbook of Contact Mechanics by : Valentin L. Popov
Download or read book Handbook of Contact Mechanics written by Valentin L. Popov and published by Springer. This book was released on 2019-04-26 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book contains a structured collection of the complete solutions of all essential axisymmetric contact problems. Based on a systematic distinction regarding the type of contact, the regime of friction and the contact geometry, a multitude of technically relevant contact problems from mechanical engineering, the automotive industry and medical engineering are discussed. In addition to contact problems between isotropic elastic and viscoelastic media, contact problems between transversal-isotropic elastic materials and functionally graded materials are addressed, too. The optimization of the latter is a focus of current research especially in the fields of actuator technology and biomechanics. The book takes into account adhesive effects which allow access to contact-mechanical questions about micro- and nano-electromechanical systems. Solutions of the contact problems include both the relationships between the macroscopic force, displacement and contact length, as well as the stress and displacement fields at the surface and, if appropriate, within the half-space medium. Solutions are always obtained with the simplest available method - usually with the method of dimensionality reduction (MDR) or approaches which use the solution of the non-adhesive normal contact problem to solve the respective contact problem.
Download or read book ASME Technical Papers written by and published by . This book was released on 1997 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Friction and Wear of Materials by : Ernest Rabinowicz
Download or read book Friction and Wear of Materials written by Ernest Rabinowicz and published by Wiley-Interscience. This book was released on 1995 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Paper written by and published by . This book was released on 1997 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Understanding Contact Mechanics and Friction on Rough Surfaces by : Siddhesh Narayan Dalvi
Download or read book Understanding Contact Mechanics and Friction on Rough Surfaces written by Siddhesh Narayan Dalvi and published by . This book was released on 2020 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the mechanism of adhesion and friction in soft materials is critical to the fields of transportation (tires, wiper blades, seals etc.), prosthetics and soft robotics. Most surfaces are inherently rough and the interfacial area between two contacting bodies depends largely on the material properties and surface topography of the contacting bodies. Johnson, Kendall and Roberts (JKR) derived an equilibrium energy balance for the behavior of smooth elastic spherical bodies in adhesive contact that predicts a thermodynamic work of adhesion for two surfaces in contact. The JKR equation gives a reversible work of adhesion value during approach and retraction. However, viscoelastic dissipation, surface roughness and chemical bonding result in different work of adhesion values for approach and retraction. This discrepancy is termed adhesion hysteresis. Roughness is undermined as a cause of hysteresis in adhesion studies. Recently, a continuum mechanics model has been developed that predicts the work of adhesion on rough surfaces with known roughness in the form of power spectral density (PSD) function. To test the above mentioned theoretical model, we have conducted JKR experiments between highly cross-linked smooth polydimethylsiloxane (PDMS) of four different elastic moduli and diamond surfaces of four different crystal sizes and roughness.The rough diamond surfaces are characterized for topography using stylus profilometry, atomic force microscopy and in-situ transmission electron microscopy combined to give a comprehensive PSD. Results suggest that the observed work of adhesion during approach is equivalent to energy required to stretch the PDMS network at the surface and in the bulk to form the real rough contact area. However, in retraction work of adhesion is found to be proportional to the ratio of excess energy spent in the loading-unloading cycle and the true contact area obtained from topography indicating conformal contact matching fracture mechanics behavior. Thus, the study resolves adhesion hysteresis discrepancy on rough surfaces.It is known that adhesion hysteresis increases interfacial friction on rough surfaces. However, an experimentally proven quantitative model is still missing. Previous studies on smooth surfaces have shown that shear stress increases with velocity initially, reaching a maximum and then either plateaus out or decreases depending upon the modulus of the sliding elastomer. We have performed shear measurements with velocities ranging from nm/sec to cm/sec between PDMS elastomers and diamond surfaces. Data suggests higher shear stresses at lower velocities for rough surfaces and thus a shift for the peak previously observed on smooth surfaces. Additionally, there are states such as steady-state sliding, stick-slip and detachment waves with increasing stress in the same order. These states are found to occur at a critical stress and their onset is linearly proportional to the elastic modulus of the sliding rubber. The stress predictions using existing theories do not decouple adhesion and deformation energy losses during friction observed ex- perimentally on rough surfaces and further investigation is required in order to obtain a better friction model.
