Title of the article ABOUT ESTIMATION OF THE INFLUENCE OF NON-UNIFORMITY OF INITIAL STATES ON LIFETIME OF FRICTION PAIRS AND TRIBO-FATIGUE SYSTEMS
Authors

BOGDANOVICH Alexander V., D. Sc. in Eng., Assoc. Prof., Professor of the Department of Theoretical and Applied Mechanics, Belarusian State University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

In the section TRIBO-FATIGUE SYSTEMS MECHANICS
Year 2021
Issue 2
Pages 88–96
Type of article RAR
Index UDK 620.178
DOI https://doi.org/10.46864/1995-0470-2021-2-55-88-96
Abstract The article analyzes relationships of the non-uniformity of the initial states and the lifetime of friction pairs and tribo-fatigue systems based on the results of the inspection of the technical condition after operating time and laboratory tests. The non-uniformity of the initial states is determined by the variation within the tolerances of the geometry of the elements due to the manufacturing technology, and its influence on the wear rate, dynamic characteristics and lifetime of mechanical systems is estimated on the example of automobile sliding friction bearing pairs and rolling bearings. A laboratory experiment to assess the performance of a model of a tribo-fatigue system “shaft (steel 45) — roller (25ХГТ (25KhGT) steel)” due to local violation of the shaft geometry during rolling is analyzed. The correlation equations are given that link the integral characteristics of the local process of wear-fatigue damage, based on measurements of the circular contour of the test specimen (coefficients of asymmetry and non-uniformity), with the relative number of cycles until the limiting wear of the tribo-fatigue system “shaft (steel 45) — liner (silumin)” under sliding friction is reached.
Keywords friction unit, tribo-fatigue system, bearings, uneven wear, tests, wear-fatigue damage
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