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Rotary fatigue testing to determine the fatigue life of NiTi alloy wires: an experimental and numerical analisys

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dc.contributor.authorCarvalho, André
dc.contributor.authorFreitas, Manuel
dc.contributor.authorReis, Luís
dc.contributor.authorMontalvao, Diogo
dc.contributor.authorFonte, M.
dc.date.accessioned2020-05-20T16:52:56Z
dc.date.available2020-05-20T16:52:56Z
dc.date.issued2016
dc.description.abstractEndodontic rotary file instruments used to treat root canals in dentistry suffered breakthrough transformations in recent years when stainless steel was replaced by Nickel-Titanium (NiTi). NiTi alloys used in Endodontics possess superelastic properties at body temperature (37C) that bring many advantages on the overall performance of the root-canal treatment. They can follow curved root canals more easily than stainless steel instruments and have been reported to be more effective in the removal of the inflamed pulp tissue and protection of the tooth structure. However, these instruments eventually fracture under cyclic bending loading due to fatigue, without any visible signals of degradation to the practitioner. This problem brought new challenges on how new instruments should be tested, as NiTi alloys are highly non-linear and present a large hysteresis cycle in the Elastic domain. Current existing standards are only available for Stainless Steel testing. Thus, many authors have attempted to design systems that can test NiTi endodontic files under fatigue loads. However, no approach has been universally adopted by the community yet, as in most cases they are based on empirical set ups. Following a more 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, as well numerical FEM simulation to verify the analytical model predictions.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCARVALHO, André; [et al] – Rotary fatigue testing to determine the fatigue life of NiTi alloy wires: an experimental and numerical analisys. Procedia Structural Integrity. ISSN 2452-3216. Vol. 1 (2016), pp. 34-41pt_PT
dc.identifier.doi10.1016/j.prostr.2016.02.006pt_PT
dc.identifier.issn2452-3216
dc.identifier.urihttp://hdl.handle.net/10400.21/11674
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPTDC/EME/AME/122795/2010 - FCTpt_PT
dc.relation.publisherversionhttps://pdf.sciencedirectassets.com/314029/1-s2.0-S2452321616X00029/1-s2.0-S245232161600007X/main.pdf?X-Amz-Date=20200520T164925Z&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Signature=20f7483f964899a49e19d88d8b0e9544a6d3f0adfb4b3b9c0cc83c4f0c7a8a75&X-Amz-Credential=ASIAQ3PHCVTYVQEXBAE7%2F20200520%2Fus-east-1%2Fs3%2Faws4_request&type=client&tid=prr-dad19520-964a-4bcc-9ea0-db5be401a42d&sid=4ca9efbe4f32384085196c61d348981ec45bgxrqb&pii=S245232161600007X&X-Amz-SignedHeaders=host&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEMD%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCXVzLWVhc3QtMSJHMEUCIQChfCbQWuZ0JsGLfSHyzZLPT5lOSEi73I28%2BG7N9OJLswIgPj7ezedYUwAlsM2tp7CYt%2FEeX4FlzwJB5Pu8nQ7riUYqtAMIGRADGgwwNTkwMDM1NDY4NjUiDOVbI2oeVzKgwTJKFSqRA7xNFrsquz3pyqHhLaqYoiuN0cn9xwDJLD3AITFGf3PGMyuDJBtLFmxUNLoiSTOrseqGBnVhBhJ5iHkiMcbn5hOkXyV%2FkVK312fFABkLXd8WDUKMCbAyCaRYdOYwSVUC7M7L0WmQ%2Fz8AnGR8kdRa5AavpSIbbPqAoIjWScVFsxOXJr5fxklUkELUOiV5HNXRZscB4i5gsU77tPEmXinjK4lIyv05w8OwPysOsg3DG4%2FAria4ayWwid1cZ%2BzFKRalN8e7Cc03emdeQ33IVADACR9YWFJgdXVEM5FKplH0o7asOikAhJBbYpOPiPVD3pww7wGb44iHHaSi0hfU5LcIfwaKj72NHN34oKzAox64cfVvpTiYBd8cyPDAqDn1fI3d7C1lalYB9p%2FTiXeATwvjOnNODmDGE1pXLgVgSeFG42uMQ5GRldUfPJZOyDzGy%2FhCXG0hpvqZHKO4Pi8E2kM5sM0p%2BYrroPsnDPsfC5UF7ewG3w8NF3T%2BbM%2B3F%2Binwl%2FVDLwvRHQydXWJIZNjB7P7WS7xML6WlfYFOusBtaDPT%2BxiCxl6cnoA6o7BRlJDzJVnY3p3gjN%2F8OOtPKoAc6nPuUot9mmLEW%2BPKkMIylfL2jCsFdsBJ2q051ftC0fFxM7HNJYLpeDDtZntAGxNmffI6LaHl9LOSN%2Bcb%2B3P6W5pG5mON%2BSS8RoUL001cr9POI%2FqJQQNV8yLQsMfOnQ4TW3mxxukGa3xXTF5UssNgm7Ol5RNWF0lgWuZnW9PDA5gpX1YxqKtBPMU9Tq9pTJBUA1KhSAY0blaIl%2Bzcho0hjsnhY9OTJrYhqxAz2p9HWC5cz80PXcij6JMu0Wh6hsJGnY%2BZqaCiNW3cA%3D%3D&host=68042c943591013ac2b2430a89b270f6af2c76d8dfd086a07176afe7c76c2c61&X-Amz-Expires=300&hash=61ae6437d580ecc5dda8b2e167a3a83da3becda501e5253005227346d0a447ffpt_PT
dc.subjectFatiguept_PT
dc.subjectFilespt_PT
dc.subjectNiTi wirespt_PT
dc.subjectLife evaluationpt_PT
dc.titleRotary fatigue testing to determine the fatigue life of NiTi alloy wires: an experimental and numerical analisyspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage41pt_PT
oaire.citation.startPage34pt_PT
oaire.citation.titleProcedia Structural Integritypt_PT
oaire.citation.volume1pt_PT
person.familyNameCarvalho
person.familyNameCoelho de Carvalho Montalvão e Silva
person.familyNameFonte
person.givenNameAndré
person.givenNameDiogo
person.givenNameManuel
person.identifier.ciencia-id4719-C315-3211
person.identifier.ciencia-id0412-999D-5548
person.identifier.orcid0000-0002-2089-7156
person.identifier.orcid0000-0003-1108-0475
person.identifier.orcid0000-0001-7894-9716
person.identifier.ridI-7571-2015
person.identifier.ridM-7101-2013
person.identifier.scopus-author-id58778332900
person.identifier.scopus-author-id6507968634
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication65d2ad9c-a654-457d-aef4-10d7ca5782fd
relation.isAuthorOfPublication.latestForDiscovery68e457b2-45ab-449f-a240-7317c1a42c1b

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