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Determination of the rotary fatigue life of NiTi alloy wires

2016-10Journal article Restricted access
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dc.contributor.authorCarvalho, André.
dc.contributor.authorMontalvão, Diogo.
dc.contributor.authorFreitas, Manuel.
dc.contributor.authorReis, Luis
dc.contributor.authorFonte, Manuel.
dc.date.accessioned2025-01-10T12:34:32Z
dc.date.available2025-01-10T12:34:32Z
dc.date.issued2016-10
dc.description.abstractNickel-Titanium (NiTi) alloys with superelastic properties have been increasingly introduced as a substitute to more conventional alloys, such as stainless steel, in a variety of applications. In Dentistry, NiTi alloys are used in tools such as Endodontic rotary files, allowing the file to follow teeth root canals more easily than their stainless steel counterparts. Nevertheless, during surgery, the file is subjected to cyclic bending loading, since it is rotating while being deformed inside the curved canals and is prone to fracture due to fatigue, without showing any visible signals of degradation. Following a systematic approach, this work presents the results of rotary fatigue tests for several NiTi wires from different manufacturers (Memry and Euroflex). The formulation is presented, where the material strength reduction can be quantified from the determination of the strain and the number of cycles until failure. Experimental tests as well as numerical Finite Element Analysis (FEA) simulations are presented to better understand the fatigue fracture mechanisms present in NiTi alloys, showing that there is good agreement between the predicted strains (difficult to measure in such small wires) and the cycles to failure.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCarvalho, A., Montalvão, D., Freitas, M., Reis, L., & Fonte, M. (2016). Determination of the rotary fatigue life of NiTi alloy wires. Theoretical and Applied Fracture Mechanics, 85, 37-44.pt_PT
dc.identifier.doihttp://dx.doi.org/10.1016/j.tafmec.2016.08.010pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.26/53722
dc.language.isoengpt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0167844216301252?via%3Dihubpt_PT
dc.subjectFatiguept_PT
dc.subjectFilespt_PT
dc.subjectNiTi wirespt_PT
dc.subjectLife evaluationpt_PT
dc.titleDetermination of the rotary fatigue life of NiTi alloy wirespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage44pt_PT
oaire.citation.startPage37pt_PT
oaire.citation.titleTheoretical and Applied Fracture Mechanicspt_PT
oaire.citation.volume85pt_PT
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT

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