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Improved description of low-cycle fatigue behaviour of 316L steel under axial, torsional and combined loading using plastic J-integral
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SYSNO ASEP 0557313 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Improved description of low-cycle fatigue behaviour of 316L steel under axial, torsional and combined loading using plastic J-integral Tvůrce(i) Slávik, Ondrej (UFM-A) ORCID
Vojtek, Tomáš (UFM-A) ORCID
Poczklán, Ladislav (UFM-A) ORCID
Tinoco Navaro, Hector Andres (UFM-A) ORCID
Kruml, Tomáš (UFM-A) RID, ORCID
Hutař, Pavel (UFM-A) RID, ORCID
Šmíd, Miroslav (UFM-A) RID, ORCIDCelkový počet autorů 7 Číslo článku 103212 Zdroj.dok. Theoretical and Applied Fracture Mechanics. - : Elsevier - ISSN 0167-8442
Roč. 118, APR (2022)Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova crack-growth ; propagation ; strain ; threshold ; damage ; Plastic Jintegral ; Multiaxial loading ; Low-cycle fatigue ; Equivalent plastic strain ; Austenitic stainless steel Vědní obor RIV JG - Hutnictví, kovové materiály Obor OECD Materials engineering CEP GJ19-25591Y GA ČR - Grantová agentura ČR GA18-03615S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UFM-A - RVO:68081723 UT WOS 000779266300004 EID SCOPUS 85121562464 DOI 10.1016/j.tafmec.2021.103212 Anotace Low-cycle fatigue behaviour and fatigue crack kinetics of the 316L austenitic stainless steel were studied under cyclic axial, torsional and in-phase combined loading using hollow cylindrical (tubular) specimens with a small hole for crack initiation. The concept of plastic. J-integral was used, which was shown in previous studies to unify the crack growth rate data for several different materials. Dependencies of Jp on crack length were determined by extensive finite element modelling considering non-linear material behaviour according to the cyclic stress-strain curve. Locally deflected cracks were modelled in accordance with amplitudes of the axial and torsional components of combined loading. The measured crack growth rate diagrams for all types of loading and for various loading amplitudes were unified using amplitude of Jp. Fatigue lives under torsional loading were much longer than under axial loading for the same equivalent plastic strain amplitude, which was explained by higher crack driving forces in terms of Jp under axial loading than under torsional loading. Fatigue lives estimated by crack propagation based on a master curve in terms of Jp,a were in a good agreement with those obtained experimentally under all types of loading. The used concept can reduce the experimental program to obtaining of material data only for axial loading, which can then be used for prediction of behaviour under in-phase multiaxial loading. The von Mises formula for multiaxial low-cycle fatigue loading eeq,p2 = ep2 + 7p2 / 3 was modified so that the fatigue lives under axial, torsional and combined loading were characterized in a matching way. Using the formula ep,Nf2 = ep2 + 7p2 / 25, the fatigue life data fell on a single Coffin-Manson curve. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2023 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0167844221003086?via%3Dihub
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