Anisotropic fractional viscoelastic constitutive models for human descending thoracic aortas.
Anisotropic viscoelasticity
Experiments
Fractional viscoelasticity
Generalized maxwell model
Genetic algorithm
Harmonic load
Human aorta
Journal
Journal of the mechanical behavior of biomedical materials
ISSN: 1878-0180
Titre abrégé: J Mech Behav Biomed Mater
Pays: Netherlands
ID NLM: 101322406
Informations de publication
Date de publication:
11 2019
11 2019
Historique:
received:
08
04
2019
revised:
11
06
2019
accepted:
18
07
2019
pubmed:
31
7
2019
medline:
28
11
2020
entrez:
31
7
2019
Statut:
ppublish
Résumé
The generalized fractional Maxwell model, formulated for hyperelastic material within the framework of the nonlinear viscoelasticity with internal variables, is applied to identify viscoelastic constitutive equations from layer-specific experimental data obtained by uniaxial harmonic loading of ex-vivo human descending thoracic aortas. The constitutive parameters are identified by using a genetic algorithm for the optimal fitting of the experimental data. The accuracy of the fitted fractional model is compared to the fitted integer order model with the same number of Maxwell elements. The formulation of an original strain energy density function for anisotropic nonlinear viscoelasticity is introduced and constitutive parameters are obtained from the experiments.
Identifiants
pubmed: 31362261
pii: S1751-6161(19)30490-4
doi: 10.1016/j.jmbbm.2019.07.010
pii:
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
186-197Informations de copyright
Copyright © 2019 Elsevier Ltd. All rights reserved.