Modeling of residually stressed material with application to AAA

Ahamed, T., Dorfmann, L. and Ogden, R.W. (2016) Modeling of residually stressed material with application to AAA. Journal of the Mechanical Behavior of Biomedical Materials, 61, pp. 221-234. (doi:10.1016/j.jmbbm.2016.01.012) (PMID:26874252)

[img]
Preview
Text
119644.pdf - Accepted Version

13MB

Abstract

Residual stresses are generated in living tissues by processes of growth and adaptation and they significantly influence the mechanical behaviour of the tissues. Thus, to effectively model the elastic response of the tissues relative to a residually stressed configuration the residual stresses need to be incorporated into the constitutive equations. The purposes of this paper are (a) to summarise a general elastic constitutive formulation that includes residual stress, (b) to specify the tensors needed for the three-dimensional implementation of the theory in a nonlinear finite element code, and (c) to use the theory and its implementation to evaluate the wall stress distribution in an abdominal aortic aneurysm (AAA) using patient specific geometry and material model parameters. The considered material is anisotropic with two preferred directions indicating the orientation of the collagen fibres in the aortic tissue. The method described in this paper is general and can be used, by specifying appropriate energy functions, to investigate other residually stressed biological systems.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Ogden, Professor Raymond
Authors: Ahamed, T., Dorfmann, L., and Ogden, R.W.
College/School:College of Science and Engineering > School of Mathematics and Statistics > Mathematics
Journal Name:Journal of the Mechanical Behavior of Biomedical Materials
Journal Abbr.:JMBBM
Publisher:Elsevier
ISSN:1751-6161
ISSN (Online):1878-0180
Published Online:27 January 2016
Copyright Holders:Copyright © 2016 Elsevier Ltd.
First Published:First published in Journal of the Mechanical Behavior of Biomedical Materials 61:221-234
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher
Related URLs:

University Staff: Request a correction | Enlighten Editors: Update this record