Sidorov, Sergey A
(2007)
Finite element modeling of human artery tissue with a nonlinear multi-mechanism inelastic material.
Doctoral Dissertation, University of Pittsburgh.
(Unpublished)
Abstract
Due to limited experimental data and a lack of understanding of the underlying microstructural deformation mechanisms involved, modeling of material behavior of biomechanical tissues presents a rather formidable task. In this dissertation, a nonlinear multi-mechanism inelastic material model is introduced for modeling vascular tissue, collagen recruitment and elastin degradation. The model is implemented into the commercial finite element software package ANSYS with user programmable features. Although the idea of using several deformation mechanisms in the same material model is by no means novel, it is the first time such model is being implemented in a commercial finite element package and applied to a numerical study of physiological processes taking place inside the vascular walls. Two numerical examples are presented: a simulation of angioplasty procedure, and a finite element analysis of fusiform aneurysm development and growth. This is by far not the exhaustive list of possible applications of the developed material model; implementation in a commercial finite element code will help facilitate innovative developments, including new ways to surgically treat vascular disorders.
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
|
| ETD Committee: |
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| Date: |
18 June 2007 |
| Date Type: |
Completion |
| Defense Date: |
15 March 2007 |
| Approval Date: |
18 June 2007 |
| Submission Date: |
22 March 2007 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Swanson School of Engineering > Mechanical Engineering |
| Degree: |
PhD - Doctor of Philosophy |
| Thesis Type: |
Doctoral Dissertation |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
ANSYS; FEA; finite element analysis; hyperelasticity; material modeling; soft tissue |
| Other ID: |
http://etd.library.pitt.edu/ETD/available/etd-03222007-172059/, etd-03222007-172059 |
| Date Deposited: |
10 Nov 2011 19:32 |
| Last Modified: |
15 Nov 2016 13:37 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/6552 |
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