Development and 3D finite elment implementation of a multiaxial constitutive relation for abdominal aortic aneurysms

Jonathan Vande Geest, Ajay Bohra, Wei Sun, Elena Di Martino, Michael Sacks, David Vorp

Research output: Contribution to journalConference article

3 Scopus citations

Abstract

The development of a biaxially derived constitutive relation into finite element analyses of patient specific abdominal aortic aneurysms (AAA), which are localized dilation of the infrarenal aorta, was investigated. Biaxial tensile tests were performed on 26 AAA specimens in order to determine a characteristic anisotropic AAA mechanical response. It was found that the maximum principle stress contours for the uniaxial and biaxial simulations for all aneurysms display similar shapes, but the biaxial simulation consistently displayed larger stress values over larger areas of the aneurysm. It was also shown that the stresses predicted using finite element simulations could be better described using a multi-axially derived constitutive relation.

Original languageEnglish (US)
Article numberIMECE2004-59643
Pages (from-to)221-222
Number of pages2
JournalAdvances in Bioengineering, BED
StatePublished - Jan 1 2004
Event2004 ASME International Mechanical Engineering Congress and Exposition, IMECE - Anaheim, CA, United States
Duration: Nov 13 2004Nov 19 2004

ASJC Scopus subject areas

  • Engineering(all)

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