The book provides clear and up-to-date presentation of working principles of lubrication, friction and wear in vital mechanical components, such as bearings, seals and gears. The third edition has expanded coverage of friction and wear and contact mechanics with updated topics based on new developments in the field.
Dr. Michael M. Khonsari holds the Dow Chemical Endowed Chair and Professor of Mechanical Engineering at Louisiana State University (LSU), where he directs the Center for Rotating Machinery. Prior to joining LSU, he served as a faculty member at The Ohio State University, University of Pittsburgh, and Southern Illinois University, and was a research Faculty Fellow at NASA Lewis (now Glenn) Research Center, Wright-Patterson Air Force laboratories, and the U.S. Department of Energy. He is holder of several US patents, has authored over 270 archival papers, 50 book chapters and special publications, and three books on tribology, fatigue, and rotor dynamics. Professor Khonsari is the recipient of ASME Mayo Hersey, ASME Burt Newkirk Awards, and serves as the Editor-in-Chief of ASME Journal of Tribology. He is a fellow of the American Society of Mechanical Engineers (ASME), Society of Tribologist and Lubrication Engineers (STLE), and the American Association for the Advancement of Science (AAAS). Dr. E. Richard Booser has been active in the field of tribology and lubrication for 70 years. He was employed by the General Electric Co. for 39 years in development work on bearings and lubricants for steam and gas turbines, electric motors and generators, aerospace and nuclear plant equipment, and a variety of related electrical products. He was the editor of three volumes of the Tribology Handbook series and a co-author of the 1957 book on Bearing Design and Application. He served as the President of the Society of Tribologists and Lubrication Engineers (STLE) in 1956 and has received the STLE National Award. Permissions Request permission to reuse content from this site
The subsurface stresses in a rolling element or raceway can be calculated using the mathematical formulas based on the Hertz theory for elliptical or line contact. In the case of ball bearings (the elliptical contact), the solution given by Sackfield and Hills  can be adopted, while in the case of roller bearings (the line contact), the solution presented by Radzimovsky can be used . The validity of both models was verified with the use of finite element (FE) analysis [18,23,34]. It suggests that FE analysis can be successfully applied for a more complicated shape of a rolling element [1,15,29]. The above-mentioned theoretical models do not take into account the influence of residual stresses and the tangential traction on the distributions of subsurface stresses. Guo and Barkey studied the influence of residual stresses and tangential traction on RCF of elements made of AISI 52100 bearing steel numerically and experimentally . On the basis of their research, two important conclusions can be formulated: the surface residual stresses and friction effects have a small influence on the subsurface RCF, and the residual stresses affect mainly the surface fatigue and near-surface damage initiation and crack growth [35,36]. Govindarajan and Gnanamoorthy also developed a distribution of contact stresses under rolling and sliding conditions for sintered and hardened steels . Vrbka et al. carried out experimental studies of the influence of surface texturing on the RCF of elements working under lubrication conditions , and they did not observe a distinct reduction of fatigue life for textured surfaces. Due to the given above observations, in the analysis of subsurface crack initiation and propagation, the tangential load, residual stresses, and surface texturing may be omitted in the fatigue calculations. The location of the fatigue crack initiation and fatigue life mainly depend on the normal load and the contact area. These justify the application of elliptical and line contact analytical solutions [32,33] for calculations of subsurface stresses in the elements of rolling bearings. 2b1af7f3a8