Physical simulation of the random failure of implanted braided NiTi stents

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00432500" target="_blank" >RIV/68378271:_____/14:00432500 - isvavai.cz</a>

Alternative codes found

RIV/61388998:_____/14:00432500

Result on the web

<a href="http://dx.doi.org/10.1007/s11665-014-0916-9" target="_blank" >http://dx.doi.org/10.1007/s11665-014-0916-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11665-014-0916-9" target="_blank" >10.1007/s11665-014-0916-9</a>

Result language

angličtina

Original language name

Physical simulation of the random failure of implanted braided NiTi stents

Original language description

A problem of random clinical failures of the braided esophageal NiTi stents has been addressed by performing physical simulation experiments on helical NiTi springs loaded in cyclic tension in air, water, and simulated biological fluid. Strains and stresses involved in spring deformation were analyzed through simulation by FEM implemented SMA model. It was found that the fatigue life of NiTi springs is significantly lower in fluids than in the air pointing toward the corrosion fatigue mechanism. There is, however, a fatigue limit roughly corresponding to the onset of martensitic transformation in the wire, which is not common for corrosion fatigue. It is proposed that surface TiO2 oxide cracking plays major role in that. Once the oxide layer on the NiTi wire surface fractures, typically during the first mechanical cycle, cracks in the oxide layer periodically open and close during subsequent mechanical cycling.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Materials Engineering and Performance

ISSN

1059-9495

e-ISSN

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Volume of the periodical

23

Issue of the periodical within the volume

7

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

2650-2658

UT code for WoS article

000339010700053

EID of the result in the Scopus database

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