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J. Funct. Biomater. 2015, 6(3), 585-597; doi:10.3390/jfb6030585

An Efficient Finite Element Framework to Assess Flexibility Performances of SMA Self-Expandable Carotid Artery Stents

1
Department of Civil Engineering and Architecture (DICAR), Università di Pavia , Pavia 27100, Italy
2
Laboratoire de Mécanique des Solides, École Polytechnique, Palaiseau 91128, France
3
Department of Electrical, Computer and Biomedical Engineering (DIII) , Università di Pavia, Pavia 27100, Italy
4
Institute for Advanced Study, Technische Universität München, Lichtenbergstraße 2a, 85748 Garching, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Lorenza Petrini
Received: 28 April 2015 / Revised: 15 June 2015 / Accepted: 10 July 2015 / Published: 14 July 2015
(This article belongs to the Special Issue Biomedical Applications of Shape Memory Alloys)
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Abstract

Computer-based simulations are nowadays widely exploited for the prediction of the mechanical behavior of different biomedical devices. In this aspect, structural finite element analyses (FEA) are currently the preferred computational tool to evaluate the stent response under bending. This work aims at developing a computational framework based on linear and higher order FEA to evaluate the flexibility of self-expandable carotid artery stents. In particular, numerical simulations involving large deformations and inelastic shape memory alloy constitutive modeling are performed, and the results suggest that the employment of higher order FEA allows accurately representing the computational domain and getting a better approximation of the solution with a widely-reduced number of degrees of freedom with respect to linear FEA. Moreover, when buckling phenomena occur, higher order FEA presents a superior capability of reproducing the nonlinear local effects related to buckling phenomena. View Full-Text
Keywords: carotid artery stents; shape memory alloys; finite element analysis; stent flexibility carotid artery stents; shape memory alloys; finite element analysis; stent flexibility
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ferraro, M.; Auricchio, F.; Boatti, E.; Scalet, G.; Conti, M.; Morganti, S.; Reali, A. An Efficient Finite Element Framework to Assess Flexibility Performances of SMA Self-Expandable Carotid Artery Stents. J. Funct. Biomater. 2015, 6, 585-597.

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