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Finite Element Stent Design: Parametric Modeling of Braided Wirestents Using PyFormex

[+] Author Affiliations
Matthieu De Beule, Benedict Verhegghe, Peter Mortier, Rudy Van Impe, Pascal Verdonck

Ghent University, Ghent, Belgium

Kim Van Loo

Ghent Universtity, Ghent, Belgium

Paper No. SBC2007-176326, pp. 719-720; 2 pages
doi:10.1115/SBC2007-176326
From:
  • ASME 2007 Summer Bioengineering Conference
  • ASME 2007 Summer Bioengineering Conference
  • Keystone, Colorado, USA, June 20–24, 2007
  • Conference Sponsors: Bioengineering Division
  • ISBN: 0-7918-4798-5
  • Copyright © 2007 by ASME

abstract

Selfexpandable stent(graft)s are supporting tubular mesh devices used for the treatment of occlusive diseases and for the ‘exclusion’ of aneurysms. Wirestents are a class of flexible stents braided from a set of ultra fine wires and currently manufactured in a wide range of materials (e.g. phynox, nitinol, polymers) and compositions (single or multilayer). For design purposes as well as for studying the mechanical behavior of such a device by finite element simulations, a geometrical model using 1D elements will usually be appropriate. However, the computer model will contain a very large number of such elements, and building the geometrical model using classical CAD methodologies may become laborious. Consequently, literature dedicated to the mechanical behavior of braided wirestents is (very) scarce and the stent(graft)s are simplified as virtual single sheets [1].

Copyright © 2007 by ASME

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