I. M. Petrova, E. A. Marchenko, M. M. Khrushchov, I. A. Buyanovskii
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引用次数: 0
Abstract
The influence of damage caused by friction and wear on the accumulation of fatigue damage in the near-surface layers of the material of technical systems operating under dynamic loading is studied. A comparison of test data on samples of carbonized steel Cr–Mn–Si under ultrasonic loading in the range of up to 109 cycles with the results of testing samples of steel 45 at a constant frequency of 100 Hz, which simulates conditions during tribological tests for frictional fatigue, shows that, in all characteristic loading frequency ranges, the resulting stresses are of the same type. When assessing the influence of frictional fatigue on the accumulation of damage and the probability of operational failures, the authors proceed from the assumption that the processes of accumulation of structural damage during cyclic and frictional fatigue are similar. Experimental studies on the behavior of friction coefficients and the magnitude of broadening of X-ray lines, which characterizes changes in the dislocation structure of metallic materials (steels and titanium alloys) during friction, as well as frictional fatigue curves, are carried out. It is shown that the process of frictional fatigue failure occurs through the mechanisms of low- and high-cycle fatigue, which can serve as a justification for the proposed approach. As an example, data are given for calculating the probability of compressor failures based on friction fatigue curves over a wide range of loading cycles obtained as a result of tests of the crankshaft neck. The use of these curves makes it possible to evaluate the influence of the combined action of dynamic load and friction resulting in an increase in gaps and dynamic loads during wear of contacting parts on the accumulation of fatigue damage, durability, and reliability during operation.
期刊介绍：
Inorganic Materials is a journal that publishes reviews and original articles devoted to chemistry, physics, and applications of various inorganic materials including high-purity substances and materials. The journal discusses phase equilibria, including P–T–X diagrams, and the fundamentals of inorganic materials science, which determines preparatory conditions for compounds of various compositions with specified deviations from stoichiometry. Inorganic Materials is a multidisciplinary journal covering all classes of inorganic materials. The journal welcomes manuscripts from all countries in the English or Russian language.
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