A Coupled Computational Framework for Multiscale Modeling and Optimization of Single Ventricle Repair

2011 ◽  
Author(s):  
Alison L. Marsden ◽  
Mahdi Esmaily Moghadam ◽  
Weiguang Yang ◽  
Alessia Baretta ◽  
Chiara Corsini ◽  
...  
Keyword(s):  
Multiscale Modeling ◽  
Single Ventricle ◽  
Three Dimensional ◽  
Circulatory System ◽  
Neumann Boundary ◽  
Dimensional Finite Element ◽  
Fontan Surgery ◽  
Three Dimensional Finite Element ◽  
Stage 1 ◽  
Two Stages

Multiscale modeling provides a means to relate global response to local changes in geometry and hemodynamics in the circulatory system. In this work, we couple a customized lumped parameter network (LPN) representing the whole circulation (heart, systemic and pulmonary circulations) to three-dimensional finite element models of two stages of the single ventricle surgical pathway. A fully-coupled closed-loop approach is employed using custom codes with Neumann boundary conditions at the inlets and outlets. The methodology is described, and applied to two stages of single ventricle repair to illustrate its utility: the BT-shunt (stage 1), and the Fontan surgery (stage 3).

Finite Element Analysis of Nonuniformity of Tires with Imperfections5

2007 ◽  
Vol 35 (3) ◽  
pp. 226-238 ◽  
Author(s):  
K. M. Jeong ◽  
K. W. Kim ◽  
H. G. Beom ◽  
J. U. Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Radial Force ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Dimensional Finite Element ◽  
Force Variation ◽  
Three Dimensional Finite Element

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.

Tire Modeling by Finite Elements

1992 ◽  
Vol 20 (1) ◽  
pp. 33-56 ◽  
Author(s):  
L. O. Faria ◽  
J. T. Oden ◽  
B. Yavari ◽  
W. W. Tworzydlo ◽  
J. M. Bass ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Rolling Contact ◽  
Test Problems ◽  
State Behavior ◽  
Normal Contact ◽  
New Developments ◽  
Applied Torque ◽  
Dimensional Finite Element ◽  
Tire Modeling ◽  
Three Dimensional Finite Element

Abstract Recent advances in the development of a general three-dimensional finite element methodology for modeling large deformation steady state behavior of tire structures is presented. The new developments outlined here include the extension of the material modeling capabilities to include viscoelastic materials and a generalization of the formulation of the rolling contact problem to include special nonlinear constraints. These constraints include normal contact load, applied torque, and constant pressure-volume. Several new test problems and examples of tire analysis are presented.

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