Title: Influence of the fluid-structure interaction in biomechanics: application to parametric modal analysis and dynamics of the aorta under a shock

Authors: A. El Baroudi, F. Razafimahery, N. Bideau, L. Rakotomanana

Addresses: IRMAR, Mechanics Group, Universite de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France. ' IRMAR, Mechanics Group, Universite de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France. ' IRMAR, Mechanics Group, Universite de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France. ' IRMAR, Mechanics Group, Universite de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France

Abstract: The ascending branch of the aorta is one of the most stressed organ of the arterial system. We aim to design a biomechanical model for analysing the aorta dynamics under a shock. The model includes the aorta layers and the influence of the blood pressure. First, we undertake a modal analysis of the coupled aorta-blood system. For the analytical solving we adopt the Helmholtz decomposition. The finite element model is then validated by these original analytical solutions. The second part focuses on aorta-blood dynamics, corresponding to an acceleration/deceleration during car crash. Numerical and analytical solutions are compared.

Keywords: fluid-structure interaction; blood-aorta interaction; arterial stenosis; multilayer; finite element method; FEM; modelling; biomechanics; parametric modal analysis; aorta dynamics; aorta layers; blood pressure; thoracic aorta; blunt trauma; aortic rupture; aortic injury; blood flow; car crash; vehicle collision.

DOI: 10.1504/IJBET.2011.039194

International Journal of Biomedical Engineering and Technology, 2011 Vol.5 No.2/3, pp.103 - 131

Published online: 21 Jan 2015 *

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