Detail publikace
Applicability of simplified computational models in prediction of peak wall stress in abdominal aortic aneurysms
NOVÁK, K. POLZER, S. BURŠA, J.
Anglický název
Applicability of simplified computational models in prediction of peak wall stress in abdominal aortic aneurysms
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
en
Originální abstrakt
In the paper impact of different material models on the calculated peak wall stress (PWS) and peak wall rupture risk (PWRR) in abdominal aortic aneurysms (AAAs) is assessed. Computational finite element models of 70 patient-specific AAAs were created using two different material models – a realistic one based on mean population results of uniaxial tests of AAA wall considered as reference, and a 100 times stiffer artificial model. The calculated results of PWS and PWRR were tested to evaluate statistical significance of differences caused by the non-realistic material model. It was shown that for majority of AAAs the differences are insignificant but for some 10% of them their relative differences exceed 20% which may lead to incorrect decisions on their surgical treatment. This percentage of failures favours application of realistic material models in clinical practise although they are much more time-consuming.
Anglický abstrakt
In the paper impact of different material models on the calculated peak wall stress (PWS) and peak wall rupture risk (PWRR) in abdominal aortic aneurysms (AAAs) is assessed. Computational finite element models of 70 patient-specific AAAs were created using two different material models – a realistic one based on mean population results of uniaxial tests of AAA wall considered as reference, and a 100 times stiffer artificial model. The calculated results of PWS and PWRR were tested to evaluate statistical significance of differences caused by the non-realistic material model. It was shown that for majority of AAAs the differences are insignificant but for some 10% of them their relative differences exceed 20% which may lead to incorrect decisions on their surgical treatment. This percentage of failures favours application of realistic material models in clinical practise although they are much more time-consuming.
Klíčová slova anglicky
Abdominal aortic aneurysm, peak wall stress, finite element model
Vydáno
02.03.2018
Nakladatel
IOS Press
Místo
Amsterdam, Nizozemsko
ISSN
0928-7329
Ročník
26
Číslo
1
Strany od–do
165–173
Počet stran
9
BIBTEX
@article{BUT143315,
author="Kamil {Novák} and Jiří {Vaverka} and Stanislav {Polzer} and Jiří {Burša},
title="Applicability of simplified computational models in prediction of peak wall stress in abdominal aortic aneurysms",
year="2018",
volume="26",
number="1",
month="March",
pages="165--173",
publisher="IOS Press",
address="Amsterdam, Nizozemsko",
issn="0928-7329"
}