A three-dimensional finite element method for large elastic deformations of ventricular myocardium: II--Prolate spheroidal coordinates.
J Biomech Eng
; 118(4): 464-72, 1996 Nov.
Article
em En
| MEDLINE
| ID: mdl-8950649
ABSTRACT
A three-dimensional finite element method for nonlinear finite elasticity is presented using prolate spheroidal coordinates. For a thick-walled ellipsoidal model of passive anisotropic left ventricle, a high-order (cubic Hermite) mesh with 3 elements gave accurate continuous stresses and strains, with a 69 percent savings in degrees of freedom (dof) versus a 70-element standard low-order model. A custom mixed-order model offered 55 percent savings in dof and 39 percent savings in solution time compared with the low-order model. A nonsymmetric 3D model of the passive canine LV was solved using 16 high-order elements. Continuous nonhomogeneous stresses and strains were obtained within 1 hour on a laboratory workstation, with an estimated solution time of less than 4 hours to model end-systole. This method represents the first practical opportunity to solve large-scale anatomically detailed models for cardiac stress analysis.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Função Ventricular
/
Modelos Cardiovasculares
Limite:
Animals
Idioma:
En
Revista:
J Biomech Eng
Ano de publicação:
1996
Tipo de documento:
Article
País de afiliação:
Estados Unidos