Strain energy function for arterial walls based on limiting fiber extensibility
Result description
An anisotropic strain energy density function based on limiting fiber extensibility assumption was suggested. The function was deduced directly from isotropic Gent model. A material was modeled as a composite reinforced with two families of helical fibers. The anisotropy of the strain energy function was incorporated via pseudo-invariants I4 and I6. Mathematical expression includes three material parameters. Suitability of the model for a description of arterial mechanical response was verified by regression analysis of experimental data. Computational model based on a cylindrical thick- walled tube with residual strains was used to estimate material parameters. Identified material model fits pressure-radius data of an aortic inflation test successfully. Further upgrades of the model are discussed.
Keywords
anisotropyaortaconstitutive modelhyperelasticitylimiting fiber extensibilitystrain energy
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Strain energy function for arterial walls based on limiting fiber extensibility
Original language description
An anisotropic strain energy density function based on limiting fiber extensibility assumption was suggested. The function was deduced directly from isotropic Gent model. A material was modeled as a composite reinforced with two families of helical fibers. The anisotropy of the strain energy function was incorporated via pseudo-invariants I4 and I6. Mathematical expression includes three material parameters. Suitability of the model for a description of arterial mechanical response was verified by regression analysis of experimental data. Computational model based on a cylindrical thick- walled tube with residual strains was used to estimate material parameters. Identified material model fits pressure-radius data of an aortic inflation test successfully. Further upgrades of the model are discussed.
Czech name
Funkce hustoty deformační energie pro cévní stěny založená na limitní průtažnosti vláken
Czech description
Byl navržen anisotropní materiálový model pro cévní stěnu založený hyperelastickém popisu kompozitního materiálu s limitní průtažnsotí vláken. Model je primárně určen k modelování chování cévní stěny. Jeho funkčnost byla ověřena experimentálně.
Classification
Type
D - Article in proceedings
CEP classification
BJ - Thermodynamics
OECD FORD branch
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Result continuities
Project
GA106/08/0557: Material properties of veins and their remodelling
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
IFMBE Proceedings
ISBN
978-3-540-89207-6
ISSN
1680-0737
e-ISSN
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Number of pages
4
Pages from-to
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Publisher name
Springer
Place of publication
Berlin
Event location
Antwerp
Event date
Nov 23, 2008
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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Basic information
Result type
D - Article in proceedings
CEP
BJ - Thermodynamics
Year of implementation
2008