ABOUT FULL FATIGUE CURVE

Sosnovskiy L.A., Doctor of Technical Sciences, Professor, Professor of the Department "Structural Mechanics", Belarusian State University of Transport, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.
Taranova E.S., Graduate Student of the Belarusian State University of Transport, Gomel, Republic of Belarus
Turin S.A., Leading Specialist, Laboratory of Wear-Fatigue Tests, RUP "Gomselmash", Gomel, Republic of Belarus

The review is given and methods of a schematization of full fatigue curve on base to 10 ⁷ cycles and to 10 ⁹ cycles are analysed. It is shown that the question on its construction is debatable. For experimental check the generalised schematization of full fatigue curve offered in work [17] is accepted. In article the basic methodical principles of carrying out of correct fatigue tests (in a wide range of change of durability) are formulated. Their realisation has led to construction of the generalised curve consisting of 4 sites: quasistatic (I), smallcyclic (II), multicyclic (III) and high-resource (IV) fatigue. In work the analysis of the received results is given. In particular, it is shown that approximation of sites by the known sedate equation states a comprehensible estimation of fatigue durability. It is offered to characterise system of key parametres of a limiting condition two numbers (σ _lim (N _σlim)) which define as value of fatigue strength (σ _lim) for this site, and durability (N _σlim) at which it is reached.

mechanical, quasi-static, low cycle, multicyclic, high-resource fatigue, complete fatigue curve, sample, limit of endurance, durability (number of cycles to failure)

• Troshhenko V.T., Sosnovskij L.A. Soprotivlenie ustalosti metallov i splavov [Fatigue resistance of metals and alloys]. Kiev, Nauk. dumka, 1987, vol. 1. 510 p., vol. 2. 825 p.
• Varvani-Farahani A., Brebbia C.A. eds. Fatigue Damage of Materials. Experimental and Analysis, UK, 2003. 528 p.
• Lalanne C. Fatigue Damage. STE –Willey, 2009.
• Gouth H.J. The fatigue of metals. London, 1926.
• Miner M.A. “Metal Fatigue”. N.Y.-Toronto-Lnd., 1959, pр. 278-289.
• French H.J. Trans. Am. Soc. Steel Treating, 21, 899 (1933).
• Zambrow I.L., Fontana M. Trans. Am. Soc. Met., 480, 1949.
• Czerold E., Trauchte K. Arch. Eisenhuttenwesen, H. 5/6. 175 p.
• Markovec M.I. Ob uravnenii diagrammy ustalosti [Equation of fatigue diagram]. Prochnost' metallov pri peremennyh nagruzkah [Strength of metals under varying loads]. Moscow, Izd-vo Akademii nauk, 1963, pp. 157-164.
• Ivanova V.S., Terentev V.F. Priroda ustalosti metallov [Nature of metal fatigue]. Moscow, Metallurgija, 1965. 456 p.
• Gusenkov A.P., Larionov V.V. Ob uslovijah ustalostnogo i kvazistaticheskogo razrushenija pri malom chisle ciklov nagruzhenija [On the conditions of quasi-static and fatigue failure for a small number of load cycles]. Soprotivlenie deformirovaniju i razrusheniju pri malom chisle ciklov nagruzhenija [Resistance to deformation and destruction of a small number of load cycles]. Moscow, Nauka, 1967, pp. 83-92.
• Serensen S.V., Kogaev V.P., Shnejderovich R.M. Nesushhaja sposobnost' i raschet detalej mashin na prochnost [Bearing capacity and calculation of machine parts strength]. Moscow, Mashinostroenie, 1975. 488 p.
• Bathias C., Paris P.C. Gigacycle Fatigue in Mechanical Practice. New York, Marcel Dekker, 2005. 304 p.
• Sosnovskij L.A. Mehanika ustalostnogo razrushenija [Mechanics of fatigue fracture]. Gomel, TRIBOFATIKA, 1994, vol. 1. 328 p., vol. 2. 340 p.
• Kuzmenko V.A. [et al.]. Ustalostnye ispytanija pri vysokih chastotah nagruzhenija [Fatigue tests at high loading frequencies]. Kiev, Nauk. dumka, 1979. 336 p.
• Kuzmenko V.A. Ustalostnye ispytanija konstrukcionnyh materialov na vysokih zvukovyh i ul'trazvukovyh chastotah nagruzhenija [Fatigue tests of structural materials at high sonic and ultrasonic frequencies loading]. Materialy VI Mezhdunar. kollokviuma “Mehanicheskaja ustalost' metallov” [Proc. Vi Int. Colloquium “Mechanical fatigue of metalls”]. Kiev, Nauk. dumka, 1983, pp. 330-336.
• Sosnovskij L.A., Mahutov N.A. O polnoj krivoj ustalosti [On the complete fatigue curve]. Zavodskaja laboratorija. Diagnostika materialov [Factory laboratory. Diagnosis materials], 1995, no. 5, pp. 33-34.