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MAN, V. STAFFA, R. BURŠA, J.
Originální název
The maximum stresses in aortic aneurysms calculated on the dependence of mesh density
Typ
abstrakt
Jazyk
angličtina
Originální abstrakt
This paper presents the influence of finite element mesh density on the resulting maximum stresses in models of patient-specific abdominal aortic aneurysms (AAAs). We present six patient-specific model geometries and two Yeoh-type constitutive models, where is a different mesh density confronted. All simulations appear from a numerical reconstruction of the unloaded geometry of the AAA. It has been demonstrated that results (wall stresses) are substantially mesh dependent; in most cases the peak wall stress increases with cumulative number of elements throughout wall thickness caused by a better description of the stress gradient in the critical point. It has been shown that this effect is more marked when Vande Geest constitutive model with higher strain stiffening is used than Raghavan-Vorp material model. To reduced the stress gradient we taken a residual stress into account; however the results indicate that three elements throughout the wall thickness are advised also in this case to obtain an acceptable accuracy of the resulting stresses.
Klíčová slova
abdominal aortic aneurysm, resisdual stress, mesh density
Autoři
MAN, V.; STAFFA, R.; BURŠA, J.
Vydáno
4. 11. 2013
Nakladatel
University of West Bohemia
Místo
Plzeň, Czech Republic
ISBN
978-80-261-0282-3
Kniha
BOOK OF EXTENDED ABSTRACTS 29th conference with international participation Computational Mechanics 2013
Strany od
79
Strany do
80
Strany počet
2
BibTex
@misc{BUT106093, author="Vojtěch {Man} and Robert {Staffa} and Jiří {Burša}", title="The maximum stresses in aortic aneurysms calculated on the dependence of mesh density", booktitle="BOOK OF EXTENDED ABSTRACTS 29th conference with international participation Computational Mechanics 2013", year="2013", pages="79--80", publisher="University of West Bohemia", address="Plzeň, Czech Republic", isbn="978-80-261-0282-3", note="abstract" }