Finite Element Analysis on Partially Closed and Fully Opened Aortic Valve
10.16156/j.1004-7220.2018.02.01
- VernacularTitle:主动脉瓣部分关闭和完全开放的有限元分析
- Author:
Guimei LIU
1
;
Youlian PAN
2
;
Wenyu FU
3
;
Aike QIAO
1
Author Information
1. College of Life Science and Bio-engineering Beijing University of Technology
2. College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology
3. College of Robotics, Beijing Union University
- Publication Type:Journal Article
- Keywords:
aortic valve;
boundary condition;
finite element analysis;
numerical simulation
- From:
Journal of Medical Biomechanics
2018;33(2):E095-E100
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the effect of different initial state setting on a valve simulation. Methods Two-dimensional structural models were established with the initial state of the aortic valve being partially closed in one model and fully opened in the other. The time-dependent load was applied to the valve and the vessel wall of the aortic and the ventricle sides. The finite element method was used to study the maximum stress, the length of the joint, and the contact force of the closed aortic valve under two different initial states. Results The stress and contact force of the aortic valve were relatively large at the closed position when the initial state was fully opened. The closure degree of the valve was low, and the variations in stress and closure degree were large during the periodic cycle. The stress and contact force of the valve were relatively small when the aortic valve was partially closed. The closure degree was high, and the variations in stress and closure degree of the aortic valve were small during the periodic cycle. Conclusions In the case of the aortic valve partially closed in the initial state, the stability of the calculation process and the closure degree of the valve were relatively high, which should be given more consideration in numerical simulation. The results can be used to study the mechanical behavior of the valve and the biomechanical mechanism of the aortic root.
