Viscoelasticity reduces the dynamic stresses and strains in the vessel wall: implications for vessel fatigue.

Viscoelasticity reduces the dynamic stresses and strains in the vessel wall: implications for vessel fatigue. Research Abstract Details 

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Viscoelasticity reduces the dynamic stresses and strains in the vessel wall: implications for vessel fatigue. Abstract Text:

Wei Zhang,Yi Liu,Ghassan S Kassab,Wei Zhang,Yi Liu,Ghassan S Kassab,

The mechanical behavior of blood vessels is known to be viscoelastic rather than elastic. The functional role of viscoelasticity, however, has remained largely unclear. The hypothesis of this study is that viscoelasticity reduces the stresses and strains in the vessel wall, which may have a significant impact on the fatigue life of the blood vessel wall. To verify the hypothesis, the pulsatile stress in rabbit thoracic artery at physiological loading condition was investigated with a quasi-linear viscoelastic model, where the normalized stress relaxation function is assumed to be isotropic, while the stress-strain relationship is anisotropic and nonlinear. The artery was subjected to the same boundary condition, and the mechanical equilibrium equation was solved for both the viscoelastic and an elastic (which has a constant relaxation function) model. Numerical results show that, compared with purely elastic response, the viscoelastic property of arteries reduces the magnitudes and temporal variations of circumferential stress and strain. The radial wall movement is also reduced due to viscoelasticity. These findings imply that viscoelasticity may be beneficial for the fatigue life of blood vessels, which undergo millions of cyclic mechanical loadings each year of life.

Viscoelasticity reduces the dynamic stresses and strains in the vessel wall: implications for vessel fatigue. Publishing Authors By Initials

W Zhang,Y Liu,GS Kassab,W Zhang,Y Liu,GS Kassab,

For similar natural sciences: chemistry: chemistry, physical: viscosity research abstracts see: natural sciences: chemistry: chemistry, physical: viscosity research

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Viscoelasticity reduces the dynamic stresses and strains in the vessel wall: implications for vessel fatigue. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: American journal of physiology. Heart and circulat

VOLUME: 293

Page Numbers: H2355-60

Journal Abbreviation: Am. J. Physiol. Heart Circ. Ph

ISSN: 0363-6135

DAY: 29

MONTH: 06

YEAR: 2007

Viscoelasticity reduces the dynamic stresses and strains in the vessel wall: implications for vessel fatigue. Information

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LANGUAGE: eng

NlmUniqueID: 100901228

Viscoelasticity reduces the dynamic stresses and strains in the vessel wall: implications for vessel fatigue. Keywords Mesh Terms:

KEYWORDS: Viscosity

MESH TERMS: physiology

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Grant and Affiliation Information for Viscoelasticity reduces the dynamic stresses and strains in the vessel wall: implications for vessel fatigue.

AFFILIATION: Department of Biomedical Engineering, Indiana University Purdue University Indianapolis, Indianapolis, Indiana 46202, USA.

Country: United States

AGENCY: United States NHLBI

GRANT: 2 R01 HL-055554-11

ACRONYM: HL

MEDLINETA: Am J Physiol Heart Circ Physio

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