Contact and friction

W. R, Harper, Contact and Frictional Electrification, Oxford University Press, Oxford, UK, 1967. 

W.B. Harper, "Contact and Frictional Electrification" (Oxford, Oxford Univ. Press, 1967). 

Harper, W. R. "Contact and Frictional Electrification" Oxford University Press Oxford, 1967. 

Harper, W. R., How do solid surfaces become charged , in Static Electrification. Proceedings of Conference, Conf. Series No. 4, The Institute of Physics and the Physical Society Static Electrification Group, London, May 1967, pp. 3-10. Harper, W. R., Contact and Frictional Electrification, Oxford university Press, 1967. 

Special elements, e.g., contact and frictional elements, are available... 

Velocity-Dependent Friction Research and development work on the numerical specification of contact and friction conditions may include mathematical formulation and implementation of friction models as well as adaptation of the numerical solution methods (Heisel et al. 2009 Neugebauer et al. 2011). Standard implementations may be illustrated using Coulomb s Law and the Friction Factor Law. These two basic models were modified using a stick-slip model. Using these models enables consideration of the relative sliding velocity between the tool and the workpiece. 

The second clue came from the study of electrical contacts and friction of bearings in the 1930s, as illustrated in Fig. 1.4. Holm and Bowden and Tabor realized that bodies apparently in contact were not truly touching ovct the geometric contact area. This was confirmed later by attempts to pass ultrasonic waves through contacts. The waves were inhibited at the contact, suggesting that only a small area of the bodies was really in molecular contact. It became clear that a design for an electrical contact could not be made on the basis of apparent... 

Tworzydlo, W.W., et al.. Computational micro- and macroscopic models of contact and friction formulation, approach and applications. Wear, 1998.220 p. 113-140. 

Pseudo atoms on different chains and those on the same chain interact with each other via a cut-and-shift Lennard-Jones potential. Lorenz et al. [82] modeled adhesion contact and friction for perfluorinated alkylsilane SAMs. The OPLS (optimized potential for liquid simulations) all-atom force-field parameters were used. The total potential energy for the system, is represented as a sum of nonbond interactions as well as energy contributions due to the distortion of bonds... 

The area of rigid body dynamical systems with contact and friction belongs to the study of nonsmooth systems. See, for example, [52, 104-108] for the theory of nonsmooth mechanics. Mathematical concepts, such as Filippov systems, measure differential inclusions, and linear complimentarity problems (LCP) are used to describe and analyze these systems. The book by Brogliato [96] is an excellent reference on these subjects and discusses a great number of relevant works. 

Ibrahim RA (1994) Friction-induced vibration, chatter, squeal, and chaos. Part I mechanics of contact and friction. Appl Mech Rev 47(7) 209-226... 

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