Universität zu Köln

Balzani, Daniel ORCID: 0000-0002-1422-4262, Deparis, Simone ORCID: 0000-0002-2832-6630, Fausten, Simon, Forti, Davide, Heinlein, Alexander ORCID: 0000-0003-1578-8104, Klawonn, Axel ORCID: 0000-0003-4765-7387, Quarteroni, Alfio, Rheinbach, Oliver ORCID: 0000-0002-9310-8533 and Schroeder, Joerg (2016). Numerical modeling of fluid-structure interaction in arteries with anisotropic polyconvex hyperelastic and anisotropic viscoelastic material models at finite strains. Int. J. Numer. Meth. Biomed., 32 (10). HOBOKEN: WILEY. ISSN 2040-7947

Full text not available from this repository.

Abstract

The accurate prediction of transmural stresses in arterial walls requires on the one hand robust and efficient numerical schemes for the solution of boundary value problems including fluid-structure interactions and on the other hand the use of a material model for the vessel wall that is able to capture the relevant features of the material behavior. One of the main contributions of this paper is the application of a highly nonlinear, polyconvex anisotropic structural model for the solid in the context of fluid-structure interaction, together with a suitable discretization. Additionally, the influence of viscoelasticity is investigated. The fluid-structure interaction problem is solved using a monolithic approach; that is, the nonlinear system is solved (after time and space discretizations) as a whole without splitting among its components. The linearized block systems are solved iteratively using parallel domain decomposition preconditioners. A simple - but nonsymmetric - curved geometry is proposed that is demonstrated to be suitable as a benchmark testbed for fluid-structure interaction simulations in biomechanics where nonlinear structural models are used. Based on the curved benchmark geometry, the influence of different material models, spatial discretizations, and meshes of varying refinement is investigated. It turns out that often-used standard displacement elements with linear shape functions are not sufficient to provide good approximations of the arterial wall stresses, whereas for standard displacement elements or F-bar formulations with quadratic shape functions, suitable results are obtained. For the time discretization, a second-order backward differentiation formula scheme is used. It is shown that the curved geometry enables the analysis of non-rotationally symmetric distributions of the mechanical fields. For instance, the maximal shear stresses in the fluid-structure interface are found to be higher in the inner curve that corresponds to clinical observations indicating a high plaque nucleation probability at such locations. Copyright (C) 2015 John Wiley & Sons, Ltd.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Balzani, Daniel UNSPECIFIED orcid.org/0000-0002-1422-4262 UNSPECIFIED Deparis, Simone UNSPECIFIED orcid.org/0000-0002-2832-6630 UNSPECIFIED Fausten, Simon UNSPECIFIED UNSPECIFIED UNSPECIFIED Forti, Davide UNSPECIFIED UNSPECIFIED UNSPECIFIED Heinlein, Alexander alexander.heinlein@uni-koeln.de orcid.org/0000-0003-1578-8104 UNSPECIFIED Klawonn, Axel UNSPECIFIED orcid.org/0000-0003-4765-7387 UNSPECIFIED Quarteroni, Alfio UNSPECIFIED UNSPECIFIED UNSPECIFIED Rheinbach, Oliver UNSPECIFIED orcid.org/0000-0002-9310-8533 UNSPECIFIED Schroeder, Joerg UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-259294
DOI:	10.1002/cnm.2756
Journal or Publication Title:	Int. J. Numer. Meth. Biomed.
Volume:	32
Number:	10
Date:	2016
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	2040-7947
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Mathematics and Computer Science > Mathematical Institute
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MONOLITHIC APPROACH; NEWTON ALGORITHM; ELEMENT-METHOD; REDUCED MODEL; BLOOD-FLOW; FORMULATION; PRECONDITIONERS; SIMULATION; FRAMEWORK; APPROXIMATION Multiple languages Engineering, Biomedical; Mathematical & Computational Biology; Mathematics, Interdisciplinary Applications Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/25929