A rate-insensitive linear viscoelastic model for soft tissues.

A rate-insensitive linear viscoelastic model for soft tissues. Research Abstract Details 

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A rate-insensitive linear viscoelastic model for soft tissues. Abstract Text:

Wei Zhang,Henry Y Chen,Ghassan S Kassab,

It is well known that many biological soft tissues behave as viscoelastic materials with hysteresis curves being nearly independent of strain rate when loading frequency is varied over a large range. In this work, the rate-insensitive feature of biological materials is taken into account by a generalized Maxwell model. To minimize the number of model parameters, it is assumed that the characteristic frequencies of Maxwell elements form a geometric series. As a result, the model is characterized by five material constants: micro(0), tau, m, rho and beta, where micro(0) is the relaxed elastic modulus, tau the characteristic relaxation time, m the number of Maxwell elements, rho the gap between characteristic frequencies, and beta=micro(1)/micro(0) with micro(1) being the elastic modulus of the Maxwell body that has relaxation time tau. The physical basis of the model is motivated by the microstructural architecture of typical soft tissues. The novel model shows excellent fit of relaxation data on the canine aorta and captures the salient features of vascular viscoelasticity with significantly fewer model parameters.

A rate-insensitive linear viscoelastic model for soft tissues. Publishing Authors By Initials

W Zhang,HY Chen,GS Kassab,

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A rate-insensitive linear viscoelastic model for soft tissues. Journal Published:

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

Journal: Biomaterials

VOLUME: 28

Page Numbers: 3579-86

Journal Abbreviation: Biomaterials

ISSN: 0142-9612

DAY: 5

MONTH: 05

YEAR: 2007

A rate-insensitive linear viscoelastic model for soft tissues. Information

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LANGUAGE: eng

NlmUniqueID: 8100316

A rate-insensitive linear viscoelastic model for soft tissues. Keywords Mesh Terms:

KEYWORDS: Linear Models

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Grant and Affiliation Information for A rate-insensitive linear viscoelastic model for soft tissues.

AFFILIATION: Department of Biomedical Engineering, IUPUI, Indianapolis, IN 46202, USA.

Country: England

AGENCY: United States NHLBI

GRANT: 2 R01 HL055554-11

ACRONYM: HL

MEDLINETA: Biomaterials

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