Open AccessSafety of Construction Components in a Very High Number of Load Cycles
Author(s) -
František Nový,
Juraj Belán,
Otakar Bokůvka
Publication year - 2020
Publication title -
system safety
Language(s) - English
Resource type - Journals
ISSN - 2657-5450
DOI - 10.2478/czoto-2020-0024
Subject(s) - reliability (semiconductor) , fatigue testing , high resistance , position (finance) , stress (linguistics) , structural engineering , cyclic stress , materials science , mathematics , engineering , physics , business , agronomy , power (physics) , linguistics , philosophy , finance , quantum mechanics , biology
Progressive, high-strength materials have an important position in the transport industry. In this industry, components are subject to high safety and reliability requirements because they often operate under long-term cyclic stress regimes. The paper presents results of fatigue resistance of high-strength materials such DOMEX 700MC, HARDOX 400, HARDOX 450, and INCONEL 718 (UTS from 850 to 1560 MPa) measured at high-frequency cyclic loading (f = 20 kHz, T = 20 ± 5 ° C, push-pull loading, cycle asymmetry parameter of R = -1) in the area from N = 2x10 6 to N = 2x10 8 cycles. Fatigue resistance showed a continuous decrease about average value S a 2x10 8 /S a 2x10 6 = 19.1%.