Deformation of the diastolic left ventricle--II. Nonlinear geometric effects
| Autor: | Bruce R. Kubert, Arthur F. Grimm, Thomas F. Moriarty, Ronald F. Janz |
|---|---|
| Rok vydání: | 1974 |
| Předmět: |
Quantitative Biology::Tissues and Organs
Heart Ventricles Biomedical Engineering Biophysics Diastole Geometry Models Biological Stress Physiological medicine Animals Orthopedics and Sports Medicine Solid of revolution Mathematics Angle of rotation Rehabilitation Isotropy Mathematical analysis Heart Elasticity (physics) Finite element method Elasticity Biomechanical Phenomena Rats Nonlinear system medicine.anatomical_structure Ventricle |
| Zdroj: | Journal of biomechanics. 7(6) |
| ISSN: | 0021-9290 |
| Popis: | A finite element model for the rat left ventricle has been developed which is based on finite deformation elasticity theory: i.e. the model is not limited by assumptions relating to the magnitudes of extensions, shears and angles of rotation which are inherent in the classical theory of elasticity. This model represents the ventricle as a heterogeneous, nonlinearly elastic, isotropic thick-wall solid of revolution. For the representation of myocardial elasticity used in this study, the model predicts overall ventricular stiffnesses at physiological pressures which are 20–30 per cent lower than those obtained with a model based on the classical theory. However, extentions predicted by the two theories differ by as much as 100 per cent in certain portions of the ventricular wall. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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