Topology optimization of a bi-stable cardiovascular stent with snap-through response

Kai A. James, Cian Conlan-Smith, Haim Waisman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present a novel design approach for cardiovascular stent devices using topology op-timization. The stent is designed so that it has two fully stable configurations, a contracted configuration used for implantation and positioning of the device, and an expanded con-figuration used for repairing blockages and facilitating blood flow. Once the device is in position, an internal force applied in the radial direction causes it to snap into its expanded configuration. The mechanics of the stent structure are simulated using finite element anal-ysis with a neo-Hookean hyperelastic formulation. We use topology optimization to obtain the material layout of a unitary cell within the mesh pattern. The resulting design has been prototyped using a 3D printer with multimaterial polyjet capability, and the bi-stability of the design has been verified experimentally.

Original languageEnglish (US)
Title of host publication17th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624104398
DOIs
StatePublished - 2016
Event17th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2016 - Washington, United States
Duration: Jun 13 2016Jun 17 2016

Publication series

Name17th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference

Other

Other17th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2016
CountryUnited States
CityWashington
Period6/13/166/17/16

ASJC Scopus subject areas

  • Mechanical Engineering
  • Aerospace Engineering

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