Dehesion-deformational nature of friction and wear-out

Two friction theories are compared: generally recognized adhesion deformation theory and alternative dehision deformation theory, founded by Prandtl and Deryagin. Concepts and peculiarities of effect of adhesion and cohesion forces of interatomic attraction are clarified. The concept of dehesion forces of interatomic repulsion is instroduced; their features are specified. Dehision deformation theory basic provisions are as follows: Compression of solid bodies results in occurrence of the interatomic repulsion forces, which after reaching the unstable equilibrium point (bifurcation point) can be instantaneously replaced with the cohesion attraction forces. Inversion (replacement) of forces forming new compounds are rare during friction, as bifurcation pressure (processes splitting) in the most pairs of substance is higher than the plasticity limit. Friction forces of solid bodies result from engagement of irregularities of the atomic-molecular roughness at the spots of actual contact. The proportionality of friction force to the normal force (Coulomb’s law) is ensured by increase of the depth of engagement of the atomic roughness, and by increase of the area of spots of actual contact. Displacement results in the cut-out of the contact surface areas. The cut-out particles of wear and tear act as the solid bodies; the particles are pressed in solid conglomerates and scratch the surfaces. Dry friction force is determined by the contact pressure, by the interlayer fragments strength, and by the strength of their links between each other and with the friction surfaces. In case of liquid friction, molecules are moved in a barrier-free irregular field of cohesion forces, thereby determining absence of friction of rest and dependence of friction forces on the flow velocity (Newton’s law), in contrast to gas friction resulting from collision of the freely moving molecules (Maxwell’s law). Liquids, which do not include polarized molecules, are pressed out of the friction area and do not affect the friction force. If lubricant includes SAS, then the friction force can change from maximum solid to minimum liquid depending on viscosity, SAS content, pressure, contact area, and slide-to-roll ratio (Stribeck dependence).

трение, атомарно-молекулярные механизмы трения, адгезия, когезия, дегезия, теории трения и изнашивания, friction, atomic-molecular friction mechanism, adhesion, cohesion, dehesion, friction and wear-out theory

1. Tomlinson G.A. A molecular theory of friction. Philosophical magazine and journal of science, 1929, Vol. 7, no. 46, рр. 905–939.

2. Markov D.P. Razvitiye predstavleniy o mekhanizmakh treniya [Development of ideas on friction mechanisms]. Treniye i iznos, 2013, Vol. 34, no. 1, рp. 70−82.

3. Markov D.P. Razvitiye predstavleniy o mekhanizmakh treniya v zhidkostyakh [Evolution of views on mechanisms of friction in liquids]. Treniye i iznos, 2015, Vol. 36, no. 5, рp. 569–576.

4. Bowden F.P., Tabor D. Treniye i smazka tverdykh tel [The friction and lubrication of solids]. P. 2. Oxford, 1964 (in Eng.).

5. Kragel’skiy I.V. Treniye i iznos [Friction and wear-out]. Moscow, Mashinostroenie Publ., 1968, 480 p.

6. Bushe N.A. Treniye, iznos i ustalost’ v mashinakh [Friction, wear-out and fatigue in machines]. Moscow, Transport Publ., 1987, 223 p.

7. Spravochnik po tribotekhnike [Reference guide for triboengineering]. Vol. 1. Theoretical fundamentals. Ed. by M. Khebda, A.V. Chichinadze. Moscow, Mashinostroenie Publ., 1989, 400 p.

8. Tribology in the USA and the Former Soviet Union: Studies and Applications. N.Y., Allerton Press, 1994, 453 p. (in Eng.).

9. Williams J.A. Engineering tribology. Oxford, N.Y., Tokyo, Oxford University press, 1994. 488 p.

10. Osnovy tribologii (treniye, iznos, smazka). Uchebnik dlya tekhn. vuzov [Fundamentals of tribology (friction, wear-out, lubrication). Textbook for technical universities]. Ed. by A.V. Chichinadze. Moscow, Science and engineering, 1995, 778 p.

11. Osnovy tribologii (treniye, iznos, smazka). Uchebnik dlya tekhn. vuzov [Fundamentals of tribology (friction, wear-out, lubrication). Textbook for technical universities]. Ed. by A.V. Chichinadze. Moscow, Mashinostroenie Publ., 2001, 664 p.

12. Goryacheva I.G. Mekhanika friktsionnogo vzaimodeystviya [Mechaniscs of friction interaction]. Moscow, Nauka Publ., 2001, 478 p.

13. Penkin N. S., Serbin V.M. Osnovy tribologii i tribotekhniki. Ucheb. posobiye [Fundamentals of tribology and triboengineering. Textbook]. Moscow, Mashinostroenie Publ., 2008, 206 p.

14. Frolov K.V. Sovremennaya tribologiya: itogi i perspektivy [Modern tribology: results and prospects]. Moscow, LKI, 2008, 480 p.

15. Polyushkin N.G. Osnovy teorii treniya, iznosa i smazki. Ucheb. posobiye [Fundamentals of the theory of friction, wear-out and lubrication. Textbook]. Krasnoyarsk, Krasnoyarsk State Agrarian University, 2013, 192 p.

16. Luzhnov Yu.M., Aleksandrov V.D. Osnovy tribotekhniki. Ucheb. posobiye [Fundamentals of triboengineering. Textbook]. Moscow, MADI, 2013, 136 p.

17. Teoriya treniya i iznashivaniya. Uchebno-metodicheskiy kompleks [Theory of friction and wera-out. Teaching package]. Ed. by A.V. Mikhailov, I.A. Korolev, V.A. Krasny. Saint Petersburg, Saint Petersburg Mining University, 2016, 166 p.

18. Dowson D. History of tribology. London-NY, 2001, 806 p.

19. Myshkin N.K., Petrakovets M.I. Tribologiya. Printsipy i prilozheniya [Tribology. Principles and applications]. Gomel’, IMS NANB, 2002, 304 p.

20. Mikhin N.M. Vneshneye treniye tverdykh tel [External friction of solids]. Moscow, Nauka Publ., 1977, 221 p.

21. Persson B.N. Sliding friction: physical principals and applications. Springer, 1998, 462 p.

22. Markov D.P. Tribologiya i eye primeneniye na zheleznodorozhnom transporte [Tribology and its application at the railway transport]. Trudy VNIIZhT [Proc. of the VNIIZhT]. Moscow, Intext Publ., 2007, 405 p.

23. Hume-Rothery W. Atomnaya teoriya dlya metallurgov [The atomic theory for metallurgists]. Oxford, 1952 (in Eng.).

24. Alekhin V.P. Fizika prochnosti i plastichnosti poverkhnostnykh sloyev materialov [Physics of strength and plasticity of the material surface layers]. Moscow, Nauka Publ., 1983, 280 p.

25. Anikina V.I. Osnovy kristallografii i defekty kristallicheskogo stroyeniya [Fundamentals of crystallography and defects of crystalline structures. Lectures]. Krasnoyarsk, Siberian Federal University, 2007, 238 p.

26. Ludema S.K. Osnovy teorii treniya i iznashivaniya [Fundamentals of the theory of friction and wear-out]. Tribology in the USA and the Former Soviet Union: Studies and Applications. Moscow, Mashinostroenie Publ., 1993, рp. 19–29.

27. Archard J.F. Contact and rubbing of flat surfaces. Journal of applied physics, 1953, no. 24, рр. 981–988.

28. Stishov S.M. Termodinamika plavleniya prostykh veshchestv [Thermodynamics of the elements melting]. Uspekhi fizicheskikh nauk, 1974, Vol. 114, no. 10, рp. 3–40.

29. Lennard-Jones J.E., Devonshire A.F. Critical and co-operative phenomena. III. A theory of melting and the structure of liquids. Proc. R. Soc. Lond. A, 1939, 169 p.

30. Whalley E., Schneider W.G. The Lennard‐Jones 12:6 potential and the viscosity of gases. J. Chem. Phys, 1952, no. 20, р. 657. DOI: https://doi.org/10.1063/1.1700510.

31. Vikipediya. Potentsial Lennard-Dzhonsa [Lennard-Jones potential]. URL: https://ru.wikipedia.org/wiki/%D0%9F%D0%BE%D1%82%D0%B5%D0%BD%D1%86%D0%B8%D0%B0%D0%BB_%D0%9B%D0%B5%D0%BD%D0%BD%D0%B0%D1%80%D0%B4-%D0%94%D0%B6%D0%BE%D0%BD%D1%81%D0%B0(retrieved on 22.07.2019).

32. Popov V.L., Gray J.A. Prandtl-Tomlinson model: history and applications in friction, plasticity, and nanotechnologies. ZAMM·Z. Angew. Math. Mech, 2012, Vol. 92, no. 9, рр. 683–708. DOI: https://doi.org/10.1002/zamm.201200097.

33. Deryagin B.V. Molekulyarnaya teoriya treniya i skol’zheniya [Molecular theory of friction and sliding]. Zhurnal fizicheskoy khimii, 1934, Vol. 5, no. 9, рp. 1165–1176.

34. Deryagin B.V. Chto takoye treniye? [What is friction?] Moscow, USSR Academy of Sciences, 1963, 230 p.