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Title of the article

ABOUT FULL FATIGUE CURVE

Authors

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

In the section DYNAMICS DURABILITY OF VEHICLES AND STRUCTURES
Year 2012 Issue 2 Pages 41-49
Type of article RAR Index UDK 620.178.3 Index BBK  
Abstract

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.

Keywords

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

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