000022697 001__ 22697
000022697 005__ 20220110134521.0
000022697 04107 $$aeng
000022697 046__ $$k2018-05-14
000022697 100__ $$aBartoňová, P.
000022697 24500 $$aDefinition of principal material directions at irregular arterial shapes

000022697 24630 $$n24.$$pEngineering Mechanics 2018
000022697 260__ $$bInstitute of Theoretical and Applied Mechanics of the Cech Academy of Sciences, Prague
000022697 506__ $$arestricted
000022697 520__ $$2eng$$aFor 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.

000022697 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022697 653__ $$aarterial mechanics, constitutive model, anisotropy, principal directions

000022697 7112_ $$aEngineering Mechanics 2018$$cSvratka, CZ$$d2018-05-14 / 2018-05-17$$gEM2018
000022697 720__ $$aBartoňová, P.$$iPolzer, S.$$iBurša, J.
000022697 8560_ $$ffischerc@itam.cas.cz
000022697 8564_ $$s453697$$uhttps://invenio.itam.cas.cz/record/22697/files/057.pdf$$yOriginal version of the author's contribution in proceedings, page , section BIO.
000022697 962__ $$r21225
000022697 980__ $$aPAPER