Peeling Tests of the Human Aortas under the Different Conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F25%3A00386041" target="_blank" >RIV/68407700:21220/25:00386041 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Peeling Tests of the Human Aortas under the Different Conditions

Popis výsledku v původním jazyce

Aortic dissection is one of the life-threatening diseases. It is manifested as a delamination process of the arterial layers. The delamination strength is investigated with the help of the peeling experiments, which resemble the mode I crack opening well-known from the fracture mechanics. These experiments were designed to take into account possible effects of material anisotropy and site-specific differences in the mechanical properties that occur along the aortic length. The computational branch of our study is based on the FEM/XFEM model of the peeling experiment built in Abaqus and attempts to find location-dependent parameters of the traction-separation law that would reflect age-related changes in the delamination resistance. The results showed that the delamination strength strongly depends on the age of the donor. It was also found that the delamination properties of the aortic wall differ significantly with respect to the crack tip orientation. It suggests that anisotropy is not only a bulk property, but also a phenomenon, which plays a role in a discontinuity propagation. In contrast to the aortic aneurysm thrombus delamination properties, our results suggest that the delamination properties of the aortic wall itself are not rate-dependent. 2022 EAN. All rights reserved.

Název v anglickém jazyce

Peeling Tests of the Human Aortas under the Different Conditions

Popis výsledku anglicky

Aortic dissection is one of the life-threatening diseases. It is manifested as a delamination process of the arterial layers. The delamination strength is investigated with the help of the peeling experiments, which resemble the mode I crack opening well-known from the fracture mechanics. These experiments were designed to take into account possible effects of material anisotropy and site-specific differences in the mechanical properties that occur along the aortic length. The computational branch of our study is based on the FEM/XFEM model of the peeling experiment built in Abaqus and attempts to find location-dependent parameters of the traction-separation law that would reflect age-related changes in the delamination resistance. The results showed that the delamination strength strongly depends on the age of the donor. It was also found that the delamination properties of the aortic wall differ significantly with respect to the crack tip orientation. It suggests that anisotropy is not only a bulk property, but also a phenomenon, which plays a role in a discontinuity propagation. In contrast to the aortic aneurysm thrombus delamination properties, our results suggest that the delamination properties of the aortic wall itself are not rate-dependent. 2022 EAN. All rights reserved.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/GA20-11186S" target="_blank" >GA20-11186S: Mechanika tepenné delaminace a šíření trhliny</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 60th Annual Conference on Experimental Stress Analysis

ISBN

978-80-01-07400-8

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

286-289

Název nakladatele

ČVUT v Praze, Fakulta strojní, Ústav mechaniky, biomechaniky a mechatroniky

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

6. 6. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—