Importance of experimental evaluation of structural parameters for constitutive modelling of aorta

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F23%3APU146924" target="_blank" >RIV/00216305:26210/23:PU146924 - isvavai.cz</a>

Alternative codes found

RIV/00159816:_____/23:00077771 RIV/00216224:14110/23:00134025

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1751616122005203" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1751616122005203</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmbbm.2022.105615" target="_blank" >10.1016/j.jmbbm.2022.105615</a>

Result language

angličtina

Original language name

Importance of experimental evaluation of structural parameters for constitutive modelling of aorta

Original language description

The study compares stresses and strains in the aortic wall derived using different constitutive models for various stress-strain conditions. Structure-based constitutive models with two fibre families with (GOH) and without (HGO) dispersion of collagen fibres are compared. The constitutive models were fitted to data from equibiaxial tension tests of two separated layers of the porcine aortic wall. The initial fit was evaluated with unrestricted parameters and subsequently, the mean angles of the fibre families and the angular dispersion were fixed to the values obtained from histology. Surprisingly, none of the tested models was capable to provide a good quality fit with histologically obtained structural parameters. Fitting the HGO model to experimental data resulted in two fibre families under angles close to +/- 45 degrees, while the GOH model resulted in a nearly isotropic fibre distribution. These results indicate that both of these models suffer from the absence of isotropic strain stiffening. After having modified both models with corresponding additional members based on the Yeoh model of matrix, we obtained a perfect fit to the measured data while keeping the structural histology-based parameters. Finally, significant differences in compliance and resulting stresses and strains between different models are shown by means of simulations of uniaxial tension test, equibiaxial tension tests and inflation of the aorta.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20602 - Medical laboratory technology (including laboratory samples analysis; diagnostic technologies) (Biomaterials to be 2.9 [physical characteristics of living material as related to medical implants, devices, sensors])

Project

<a href="/en/project/GA21-21935S" target="_blank" >GA21-21935S: Computational modelling of pulsatile flow in compliant tubes with application for tandem carotid stenosis</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of the mechanical behavior of biomedical materials

ISSN

1751-6161

e-ISSN

1878-0180

Volume of the periodical

138

Issue of the periodical within the volume

2

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

„105615-1“-„105615-8“

UT code for WoS article

000899579700003

EID of the result in the Scopus database

2-s2.0-85143656828