Numerical Analysis of Aortic Valve Stress for Phantom Experiments

AbstractIn order to analyze stress and flow field around the aortic valve, various numerical method have been developed. The validity of the results has been confirmed from the point of hemo dynamical, fluid dynamical, view. However, it has not been evaluated from the point of view of structural mechanics. The purpose of this study is to construct a stress measurement experiment using a phantom model and to establish a numerical analysis method for it. The phantom model of the aortic valve was created with reference to the valve shape used for aortic valve reconstruction surgery. The displacement field of the phantom model is measured using Digital Image Correlation (DIC), which measures the three-dimensional displacement field on object surface using a stereo camera. In the numerical analysis, a finite element model simulating a phantom experiment is created, and quasi-static analysis is performed by an explicit method using LS-Dyna. Though the experimental results have not been obtained yet, according to the numerical analysis, max principle strain will increase at the fixed commissure and center of the coaptation.KeywordsAortic valveDigital Image Correlation (DIC)LS-Dyna