Explicit Dynamic Analysis of Mitral Valve Closure using Hyperelastic Constitutive Modeling

Mitral valve simulation remains a controversial topic, asa result of its complex anatomical structure andmechanical characteristics such as material propertiesand time dependent loading conditions. This studypresents a modeling and simulation of human mitralvalve behavior considering the effects of materialnonlinearity via a numerical analysis. Three-dimensionalsized geometrical model obtained from anatomicallymeasurement used as structural model. The explicit finiteelement method including inertia effects and timedependencies implemented for numerical solution. Twodifferent material models have been considered toillustrate the effect of material nonlinearity on the stressand strain imposed by leaflets. Based on the results,although the linear elastic model exhibits an acceptablecorrelation in the location of high stress regions with thehyperelastic model but Stress magnitudes differ betweenthe elastic and hyper elastic model. Different closedvalve configurations may rise from different materialproperties and the hyper elastic formulation exhibits abetter correlation with anatomical studies.

کلیدواژه ها:

Human Mitral Valve ، Explicit FEM ، Cardiovascular Mechanics ، Hyper-elasticity