Detail publikace

Definition of principal material directions at irregular arterial shapes

BARTOŇOVÁ, P. POLZER, S. BURŠA, J.

Originální název

Definition of principal material directions at irregular arterial shapes

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

For computational modelling of arterial tissues anisotropic constitutive models are preferred for which knowledge on orientation of fibres (principal material directions) is needed. In this paper the impact of different approaches to definition of principal material directions in an anisotropic model of arterial wall is evaluated. Finite element models of different regular shapes were created, as well as two idealized geometries of aortic aneurysms as examples of irregular shapes. In those geometries, difference in maximum principal stresses in the arterial wall was used for evaluation of impact of uncertainty in the principal directions. It was shown that for a cylindric shape the error is negligible but it increases for more irregular geometries. For an asymmetric aortic aneurysm the impact of different orientations of principal material directions was more than 20 % which shows that the uncertainty in orientation of principal material directions may cause significant errors deteriorating completely the advantage of anisotropic material description.

Klíčová slova

arterial mechanics, constitutive model, anisotropy, principal directions

Autoři

BARTOŇOVÁ, P.; POLZER, S.; BURŠA, J.

Vydáno

14. 5. 2018

ISBN

978-80-86246-88-8

Kniha

Engineering Mechanics 2018

ISSN

1805-8256

Periodikum

Engineering Mechanics ....

Stát

Česká republika

Strany od

57

Strany do

60

Strany počet

4

URL

http://www.engmech.cz/improc/2018/57.pdf

BibTex

@inproceedings{BUT151689,
  author="Petra {Bartoňová} and Stanislav {Polzer} and Jiří {Burša}",
  title="Definition of principal material directions at irregular arterial shapes",
  booktitle="Engineering Mechanics 2018",
  year="2018",
  journal="Engineering Mechanics ....",
  pages="57--60",
  doi="10.21495/91-8-57",
  isbn="978-80-86246-88-8",
  issn="1805-8256",
  url="http://www.engmech.cz/improc/2018/57.pdf"
}