The maximum stresses in aortic aneurysms calculated on the dependence of mesh density

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F13%3APU108209" target="_blank" >RIV/00216305:26210/13:PU108209 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The maximum stresses in aortic aneurysms calculated on the dependence of mesh density

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

The maximum stresses in aortic aneurysms calculated on the dependence of mesh density

Popis výsledku anglicky

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

Druh

O - Ostatní výsledky

CEP obor

BO - Biofyzika

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2013

Kód důvěrnosti údajů

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