Journal article
Three-Dimensional Finite Element Analysis of Residual Stress in Arteries
Annals of biomedical engineering, Vol.32(2), pp.257-263
02/2004
DOI: 10.1023/B:ABME.0000012745.05794.32
PMID: 15008373
Abstract
Calculation of residual stress in arteries, using the analytical approach has been quite valuable in our understanding of its critical role in vascular mechanics. Stresses are calculated at the central section of an infinitely long tube by imposing a constant axial stretch while deforming the artery from the stress-free state to its unloaded state. However, segments used to perform opening-angle measurements have finite lengths. Further, the stress-free artery configuration is assumed to be circular. Experiments show that they are slightly noncircular. The numerical approach to residual stress calculation can allow us to study both these issues. Using 3D cylindrical geometries and an isotropic material model, we investigated how segment length can affect residual stress calculations and identified the appropriate segment length for experiments. Further, we recorded and used the true noncircular stress-free state of an artery segment, computed the residual stress distribution, and compared it to that from a similar, but circular segment. Our findings suggest that segment length must be ten times the wall thickness for it to be “long” enough. We also found that the circularity assumption may be a reasonable approximation for typical arteries.
Details
- Title: Subtitle
- Three-Dimensional Finite Element Analysis of Residual Stress in Arteries
- Creators
- M Raghavan - Department of Biomedical Engineering University of Iowa Iowa City IAS Trivedi - Department of Biomedical Engineering University of Iowa Iowa City IAA Nagaraj - Division of Cardiology Northwestern University Chicago ILD McPherson - Division of Cardiology Northwestern University Chicago ILK Chandran - Department of Biomedical Engineering University of Iowa Iowa City IA
- Resource Type
- Journal article
- Publication Details
- Annals of biomedical engineering, Vol.32(2), pp.257-263
- Publisher
- Kluwer Academic Publishers-Plenum Publishers; New York
- DOI
- 10.1023/B:ABME.0000012745.05794.32
- PMID
- 15008373
- ISSN
- 0090-6964
- eISSN
- 1573-9686
- Language
- English
- Date published
- 02/2004
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering
- Record Identifier
- 9984064561602771
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