Paper Title:
Thermoelastic Stress Analysis of Nitinol Self-Expanding Stents
  Abstract

Self-expanding stents are small medical devices used to treat vascular disease and are typically fabricated from a super-elastic, shape memory alloy known as Nitinol and have a fine mesh structure. This paper describes preliminary work on the application of Thermoelastic Stress Analysis (TSA) to Nitinol stents. Uniaxial tensile tests were conducted on thin tubes of Nitinol to characterise the material mechanical properties. TSA calibration exercises were conducted, which showed that Nitinol exhibits a non-uniform thermoelastic response through its elastic region that corresponded to the superelastic behaviour. Initial TSA demonstrated that a viable thermoelastic signal could be obtained from the stents. In high resolution tests the effect of motion and noise were considerable but it was still possible to obtain a readable thermoelastic signal.

  Info
Periodical
Edited by
J.M. Dulieu-Barton and S. Quinn
Pages
47-52
DOI
10.4028/www.scientific.net/AMM.3-4.47
Citation
J. Eaton-Evans, J. M. Dulieu-Barton, E. G. Little, I. A. Brown, "Thermoelastic Stress Analysis of Nitinol Self-Expanding Stents", Applied Mechanics and Materials, Vols. 3-4, pp. 47-52, 2005
Online since
August 2006
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$32.00
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