SOME FEATURES OF ASSESSMENT OF EFFECTIVE SCOPE OF TENSION INTENSITY COEFFICIENT FOR CRACKS IN THE CORROSION ENVIRONMENT
Tagayev N.S. Saidulayeva N.S. Yakubov S.H. Abdiramanov K.S. Kalykulova A.O.
2024National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2024#2024Issue 2197 - 204 pp.
The majority of details of machines and structural elements is operated in the conditions of impact of cyclic loading and the corrosion environment (CE). It is possible to carry the hydraulic turbines and centrifugal pumping units to such constructions whose blades progressively experience the tense of alternate loading in the corrosion environment. At the same time, though a dynamic load makes about 10-20 % of static, the majority of cases of damages and destructions has fatigue character (Barp et al., 1973: 166-170; Antipov et al., 2007: 46-48). It can be promoted by different fracture defects which are available in a detail of construction that create a favorable condition for origin of fatigue cracks at an early stage of an operation. Further damage of products is connected with development of a crack. In this regard the problem of reliable, accident-free operation of the different transport equipment and oil and gas equipment, pipelines becomes more and more relevant in recent years. In this article it is presented experimental data on a research of cyclic crack resistance which are widely applied in steel mechanical engineering under different testing conditions. Here are analyzed the influences of small variable tension, skewness coefficient of a cycle (R) and duration of base of tests taking into account the corrosion environment (CE) for the growth rate of a fatigue crack (GFC). The formula for assessment of effective scope of the intensity coefficient tension (TIC) for cracks in the corrosion environment is offered.
closed cracks , coefficient of opening of a crack , corrosion environment , crack growth rate of fatigue cracks , defect , fatigue , hydrogen saturation , stress , stress intensity factor
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South Kazakhstan State University named after M. Auezov, Shymkent, Kazakhstan
Kalmykia State University named after B.B. Gorodovikov, Elista, Russian Federation
South Kazakhstan State University named after M. Auezov
Kalmykia State University named after B.B. Gorodovikov
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026