Experimental and Numerical Investigation of Thermomechanical Cycling of Notched NiTi Shape Memory Ribbon Using SMA Model Accounting for Plastic Deformation

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dc.contributor.authorShayanfard, Pejmancs
dc.contributor.authorHeller, Luděkcs
dc.contributor.authorŠandera, Pavelcs
dc.contributor.authorŠittner, Petrcs
dc.coverage.issue1cs
dc.coverage.volume15cs
dc.date.accessioned2021-09-22T10:54:05Z
dc.date.available2021-09-22T10:54:05Z
dc.date.issued2021-09-07cs
dc.description.abstractShape 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. It appeared that, even if only very low tensile stress is externally applied upon thermal cycling, local tensile stress at the notch tip sharply increases during the first cooling due to the forward martensitic transformation (MT) proceeding heterogeneously in space. This heterogeneity gives rise to plastic deformation at the notch-tip, which gradually accumulates upon thermal cycling and shields the notch tip from tensile overloading. Hence, fatigue performance of thermal NiTi actuator with stress riser depends very much on the plastic deformability of the alloy.en
dc.formattextcs
dc.format.extent1759-1776cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationJournal of Materials Research and Technology. 2021, vol. 15, issue 1, p. 1759-1776.en
dc.identifier.doi10.1016/j.jmrt.2021.08.132cs
dc.identifier.issn2238-7854cs
dc.identifier.other172420cs
dc.identifier.urihttp://hdl.handle.net/11012/201636
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofJournal of Materials Research and Technologycs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S2238785421009571cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2238-7854/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectShape MemoryAlloyActuatoren
dc.subjectThermal Actuatoren
dc.subjectStress Riseren
dc.subjectMartensitic Transformationen
dc.subjectPlastic deformationen
dc.subjectConventional Plasticityen
dc.subjectSMA modelen
dc.subjectDICen
dc.subjectFinite ElementAnalysisen
dc.subjectDouble Notched Ribbonen
dc.titleExperimental and Numerical Investigation of Thermomechanical Cycling of Notched NiTi Shape Memory Ribbon Using SMA Model Accounting for Plastic Deformationen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-172420en
sync.item.dbtypeVAVen
sync.item.insts2022.01.03 16:54:49en
sync.item.modts2022.01.03 16:16:04en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav fyzikálního inženýrstvícs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Příprava a charakterizace nanostrukturcs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé kovové materiály a kompozity na bázi kovůcs
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Pokročilé kovové materiály a kompozity na bázi kovů
Příprava a charakterizace nanostruktur
Ústav fyzikálního inženýrství