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Experimental and numerical investigation of thermomechanical cycling of notched NiTi shape memory ribbon using SMA model accounting for plastic deformation
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SYSNO ASEP 0546011 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Experimental and numerical investigation of thermomechanical cycling of notched NiTi shape memory ribbon using SMA model accounting for plastic deformation Author(s) Shayanfard, Pejman (FZU-D) ORCID
Heller, Luděk (FZU-D) RID, ORCID
Šandera, P. (CZ)
Šittner, Petr (FZU-D) RID, ORCIDNumber of authors 4 Source Title Journal of Materials Research and Technology-JMR&T. - : Elsevier - ISSN 2238-7854
Roč. 15, Nov (2021), s. 1759-1776Number of pages 18 s. Language eng - English Country BR - Brazil Keywords shape memory alloy actuator ; thermal actuator ; stress riser ; martensitic transformation ; plastic deformation ; conventional plasticity ; SMA model ; DIC Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA20-14114S GA ČR - Czech Science Foundation (CSF) GA18-03834S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000734200100010 EID SCOPUS 85114984610 DOI 10.1016/j.jmrt.2021.08.132 Annotation Shape memory alloys (SMAs) are being increasingly applied as thermally driven actuators. The commercially available SMA elements, however, frequently contain stress risers, either due to internal or surface defects or due to the required component shape. Stress risers represent a potential danger for the preliminary fatigue failure of such actuators but its actual mechanism is not very clear. This paper presents a combined experimental (2D DIC analysis of surface strains) and numerical analysis (SMA model with plastic deformation) of the stress, strain and phase fraction fields evolving in a thin NiTi shape memory ribbon with an artificial notch subjected to cyclic cooling-heating through transformation range under constant external force. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0322652
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