Residual stresses in oscillating thoracic arteries reduce circumferential stresses and stress gradients

Document Type

Article

Publication Date

1-1-1997

Abstract

The purpose of this paper is to examine the effects of residual stresses and strains in the oscillating arteries on the stress distribution in the vascular wall. We employ a static theory of large elastic deformations for orthotropic material with the acceleration term added to make the theory dynamic. We use the static elastic parameters of residual stresses in our analysis because the dynamic parameters are not available in the literature. Our analysis reveals that the effect of considering the residual stresses is to decrease the very large circumferential stresses at the inner wall by 62% and reduces the stress gradient through the arterial wall by 94% compared to the case when residual stresses are ignored. Thus, because the arteries do contain residual stresses, the consequent lower stresses at the inner wall and the reduced stress gradient may reduce the progression of atheroma. Our computations show that the stress gradients do not depend on the heart rate.

Identifier

0031031079 (Scopus)

Publication Title

Journal of Biomechanics

External Full Text Location

https://doi.org/10.1016/S0021-9290(97)81292-4

ISSN

00219290

PubMed ID

8970925

First Page

57

Last Page

62

Issue

1

Volume

30

Grant

T32HD007417

Fund Ref

Eunice Kennedy Shriver National Institute of Child Health and Human Development

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