Volume 3, Issue 9 (October 2006)

    Experimental Studies of NiTi Self-expanding Stent Designs

    (Received 11 October 2005; accepted 14 June 2006)

    CODEN: JAIOAD

      Format Pages Price  
    PDF Version 12 $25   ADD TO CART


    Abstract

    Preliminary investigations to apply thermoelastic stress analysis (TSA) to Nitinol self-expanding stents are described. Tests conducted at high resolution indicated that a viable thermoelastic signal can be obtained from the fine stent structure. It is shown that it is possible to digitally compensate for errors arising from motion at this high resolution. High variability in Nitinol's material properties with stress and temperature result in a complex thermoelastic response. Correction strategies are proposed to account for variation in material properties and to minimize errors due to thermal variations in order to derive calibration factors for the austenite and martensite material phases. The greatest challenge is identified as calibrating the thermoelastic response from the radially loaded stent structure where it is likely the material is highly inhomogeneous.


    Author Information:

    Eaton-Evans, J
    Research Student and Professor, University of Limerick,

    Dulieu-Barton, JM
    Reader in Experimental Mechanics, School of Engineering Sciences, University of Southampton,

    Little, EG
    Research Student and Professor, University of Limerick,

    Brown, IA
    Research Student and Professor, University of Limerick,


    Stock #: JAI100388

    ISSN: 1546-962X

    DOI: 10.1520/JAI100388

    ASTM International is a member of CrossRef.

    Author
    Title Experimental Studies of NiTi Self-expanding Stent Designs
    Symposium Fatigue and Fracture of Medical Metallic Materials and Devices, 2005-11-11
    Committee E08