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Overview of an experimental program for development of yield surfaces tracing method
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SYSNO ASEP 0546139 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Overview of an experimental program for development of yield surfaces tracing method Author(s) Štefan, Jan (UT-L)
Parma, Slavomír (UT-L) RID, ORCID, SAI
Marek, René (UT-L) RID
Plešek, Jiří (UT-L) RID, ORCID, SAI
Ciocanel, C. (US)
Feigenbaum, H. P. (US)Number of authors 6 Article number 7606 Source Title Applied Sciences-Basel. - : MDPI
Roč. 11, č. 16 (2021)Number of pages 13 s. Publication form Online - E Language eng - English Country CH - Switzerland Keywords experimental mechanics ; phenomenological plasticity theory ; yield surface ; directional distortional hardening Subject RIV JR - Other Machinery OECD category Mechanical engineering R&D Projects LTAUSA18199 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA19-03282S GA ČR - Czech Science Foundation (CSF) EF15_003/0000493 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UT-L - RVO:61388998 UT WOS 000688745000001 EID SCOPUS 85113492912 DOI 10.3390/app11167606 Annotation This paper develops an experimental technique to evaluate the initial yield surfaces of metallic materials, as well as to study their evolution during plastic flow. The experimental tracing of yield surfaces is necessary for deriving and calibrating more robust phenomenological models of directional distortional hardening. Such models can be used to characterize the behavior of structures experiencing complicated and demanding loading modes, such as multiaxial ratcheting. The experimental technique developed in this work uses thin-walled tubular specimens, along with a servo-hydraulic machine, under various modes of tension/compression and torque. Identification of the onset of plastic flow is based on a small proof equivalent plastic strain evaluated from the outputs of a contact biaxial extensometer firmly attached to a specimen surface. This allows for evaluation of both the initial yield surface, as well as theevolved yield surface after a plastic prestrain. Throughout a test, continuous and fully automatized evaluation of elastic moduli and proof plastic strain is assured through algorithms written in C# language. The current technique is shown to provide promising results to effectively capture the yield surfaces of conventional metallic materials. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2022 Electronic address https://www.mdpi.com/2076-3417/11/16/7606/htm
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