Název: Development of autonomous experimental system to analyse yield surfaces distortion due to multiaxial ratcheting
Autoři: Svárovský, Jiří ; Parma, Slavomír ; Štefan, Jan ; Ciocanel, C. ; Feigenbaum, H. P. ; Marek, René ; Klepač, Vilém ; Plešek, Jiří
Typ dokumentu: Příspěvky z konference
Konference/Akce: Engineering Mechanics 2023 /29./, Milovy (CZ), 20230509
Rok: 2023
Jazyk: eng
Abstrakt: Multiaxial ratcheting is a failure mode of structures characterized by the accumulation of plastic strain due to cyclic loading. Despite several models having been developed to predict multiaxial ratcheting, they often fail when validated with experimental data collected under a wide array of loading conditions. In this study, an experimental setup was developed and an autonomous testing procedure was used to experimentally analyze the evolution of the yield surface shape due to cyclic biaxial loading. Thin-walled tubular test specimens were made of 304L steel with a diameter of 40mm and underwent axial-torsional testing using the Instron 8852 system. The total axial strain was increased from 0 to 1% while the total shear strain underwent 5 cycles with the strain amplitude of 0.5% and the mean strain of 0.5%. Three yield surfaces were measured after the straining sequence was completed. Results showed strong directional distortional hardening and good agreement between the flow vectors and the normals to the yield surface, lending support to the associative flow rule.
Klíčová slova: flow rule; multiaxial ratcheting; strain hardening; yield surface distortion
Číslo projektu: GA23-05338S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Engineering Mechanics 2023 : 29th International Conference, ISBN 978-80-87012-84-0, ISSN 1805-8248

Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný na externích webových stránkách.
Externí umístění souboru: https://www.engmech.cz/improc/2023/243.pdf
Původní záznam: https://hdl.handle.net/11104/0350005

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-538532


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Věda a výzkum > AV ČR > Ústav termomechaniky
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