Volume 16, Issue 3 (2016)                   Modares Mechanical Engineering 2016, 16(3): 263-272 | Back to browse issues page

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Noamani A, Dehghan Niestanak V, Asgari M. A 3D Unpressurized Model for Non Linear Dynamic Analysis of Human Aortic Valve in Dynamic Condition. Modares Mechanical Engineering. 2016; 16 (3) :263-272
URL: http://mme.modares.ac.ir/article-15-7506-en.html
Abstract:   (3010 Views)
Aortic Valve simulation remains a controversial topic, as a result of its complex anatomical structure and mechanical characteristics such as material properties and time-dependent loading conditions. This study aims to integrate physiologically important features into a realistic structural simulation of the aortic valve. A finite element model of the natural human aortic valve was developed considering Linear Elastic and Hyperelastic material properties for the leaflets and aortic tissues and starting from the unpressurized geometry. It has been observed that although similar stress-strain patterns generated on Aortic Valve for both material properties, the hyperelastic nature of valve tissue can distribute stress smoothly and lower strain during the cardiac cycle. The deformation of the aortic root can play a prominent role as its compliance extremely changed throughout cardiac cycle. Furthermore, dynamics of the leaflets can reduce stresses by affecting geometries. The highest values of stress occurred along the leaflet attachment line and near the commissure during diastole. The effects of high +G acceleration on the performance of valve, valve opening and closing characteristics, and equivalent Von Mises stress and strain distribution are also investigated.
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Article Type: Research Article | Subject: Biomechanics
Received: 2015/11/24 | Accepted: 2016/01/23 | Published: 2016/03/9

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