000004673 001__ 4673
000004673 005__ 20141119144543.0
000004673 04107 $$aeng
000004673 046__ $$k2002-06-02
000004673 100__ $$aHaussy, Bernard
000004673 24500 $$aAN ORTHOTROPIC HYPERELASTIC MODEL OF CYLINDRICAL THICK SHELLS UNDER PRESSURE : APPLICATION TO THE MODELING OF ANEURYSM

000004673 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004673 260__ $$bColumbia University in the City of New York
000004673 506__ $$arestricted
000004673 520__ $$2eng$$aThe mechanical behavior of blood vessels has been analyzed considering a thick-walled multilayer cylindrical orthotropic model material undergoing large deformations. We analyze herewith the behavior of thick non-linear shells submitted to a pressure on both their internal and external faces, up to the bifurcation regime. We aim thereby at modeling the aneurysm pathology, when an instability inherent to the vessel is triggered by external factors, leading to a bifurcated shape. In order to model in a as realistic manner as possible the vessel, the material of the shell is assumed to obey an orthotropic hyperelastic behavior, and a single layer model is envisaged first. The response of the material is assumed to be instantaneous, so that time-dependent effects shall not be considered in the present contribution. The case of a Saint-Venant Kirchhoff material is considered with special emphasis. The stability conditions of the shell are being studied, and bifurcation conditions are formulated, in terms of the applied pressure, and the geometrical and mechanical parameters that characterize the shell. Bifurcation points are evidenced and calculated.

000004673 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004673 653__ $$ashells, orthotropic hyperelastic material, bifurcation behavior, aneurysm

000004673 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004673 720__ $$aHaussy, Bernard$$iGanghoffer, Jean-François
000004673 8560_ $$ffischerc@itam.cas.cz
000004673 8564_ $$s242019$$uhttps://invenio.itam.cas.cz/record/4673/files/149.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004673 962__ $$r4594
000004673 980__ $$aPAPER