The Geometric and Material Nonlinear Analysis of the Bioprosthetic Heart Valve

2012 ◽  
Vol 157-158 ◽  
pp. 714-718
Author(s):  
Quan Yuan ◽  
Hai Bo Ma ◽  
Cheng Rui Zhang ◽  
Hua Cong ◽  
Xin Ye
Keyword(s):  
Finite Element ◽  
Heart Valve ◽  
Computer Aided Design ◽  
Mechanical Performance ◽  
Bioprosthetic Heart Valve ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Von Mises ◽  
Material Nonlinear ◽  
Aided Design

This paper constructs four types of bioprosthetic heart valve’s parametric model via computer aided design, a series of accurate parameters of the bioprosthetic heart valve, such as radius of the sutural ring, height of the supporting stent and inclination of the supporting stent are determined. The finite element method is used to analyze the mechanical properties of the bioprosthetic heart valve in which geometric non-linearity and material non-linearity are all taken into account. The finite element analysis results show that the shape of the bioprosthetic has a significant effect on the mechanical performance of the valve. The stress distribution of ellipsoidal valve leaflets is comparatively reasonable. It has lower peak von-Mises, smaller stress concentration area than the other three types of valve leaflets. This work is very helpful to manufacture valvular leaflets with reasonable shapes and to prolong the lifetime of the bioprosthetic heart valve.

The Analysis of Bioprosthetic Heart Valve with Different Suture Densities

2013 ◽  
Vol 457-458 ◽  
pp. 536-539
Author(s):  
Quan Yuan ◽  
Xia Zhang ◽  
Jun Zhang ◽  
Xu Huang
Keyword(s):  
Heart Valve ◽  
Computer Aided Design ◽  
Mechanical Performance ◽  
Dynamic Properties ◽  
Parametric Models ◽  
Stress Distributions ◽  
Bioprosthetic Heart Valve ◽  
Element Analysis ◽  
Von Mises ◽  
Aided Design

In order to investigate the effect of suture density on the dynamic behavior of bioprosthetic heart valve, we establish the spherical leaflets models via computer aided design. Based on the parametric models of the heart valve, four kinds of suture density is analyzed and finite element analysis is used to simulate the mechanical performance of bioprosthetic heart valve. The results show that the stress distributions of the spherical valve leaflets with different suture density is quite different and the peak von-Mises with 50 suture points is lower than the other three kinds of suture density. From the whole loading process, we can find that the spherical valve leaflet with 50 suture points has better dynamic properties. This work is very helpful when manufacuturing the bioprosthetic heart valve，thus to prolong the lifetime of the bioprosthetic heart valve.

The Influence of Suture Density on Bioprosthetic Heart Valve

2013 ◽  
Vol 300-301 ◽  
pp. 1654-1657
Author(s):  
Quan Yuan ◽  
Hai Bo Ma ◽  
Xu Huang
Keyword(s):  
Finite Element ◽  
Heart Valve ◽  
Computer Aided Design ◽  
Dynamic Properties ◽  
Peak Stress ◽  
Bioprosthetic Heart Valve ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Aided Design

This paper constructs the parametric model of the spherical heart valve via computer aided design, a series of accurate parameters of the bioprosthetic heart valve, such as the radius of the sutural ring, height of the supporting stent and inclination of the supporting stent are determined. The finite element method is used to determine the effect of the suture density on the dynamic properties of the bioprosthetic heart valve. The finite element analysis results show that the suture has a significant effect on the dynamic properties of the leaflets. The peak stress with different suture density is quite different and the stress distribution with higher suture density is more reasonable than that with lower suture density. In addition, the suture density has more effect at the top of the attachment edge than the other parts of the valve leaflets. This work is very helpful to manufacture the bioprosthetic heart valve with long term durability.

Influence of Material Thickness to the Dynamic Mechanical Properties of Bioprosthetic Heart Valve

2012 ◽  
Vol 502 ◽  
pp. 479-484
Author(s):  
Xu Huang ◽  
Quan Yuan ◽  
Hua Cong ◽  
Hai Bo Ma ◽  
Xin Ye
Keyword(s):  
Heart Valve ◽  
Computer Aided Design ◽  
Mechanical Performance ◽  
Dynamic Mechanical Properties ◽  
Bioprosthetic Valve ◽  
Bioprosthetic Heart Valve ◽  
Element Analysis ◽  
Primary Stress ◽  
Ellipsoidal Surface ◽  
Aided Design

The paper constructs one type of bioprosthetic valve leaflets’ parametric model via computer aided design, a series of accurate parameters of the bioproshtetic heart valve, such as radius of the sutural ring, height of the supporting stent and inclination of the supporting stent, are determined. Numerical simulation is used to determine the effect of one shape design on the mechanical performance of the bioprosthetic valve leaflet. The stress with a shape under the same load is analysed and the thickness of the leaflets 0.5mm and 0.6mm is compared by us. We creat a ellipsoidal surface in accordance with geometrical features. The experimental results of the finite element analysis show that stress distribution of the same bioprosthetic heart valve leaflets with different thickness is different. The maximal primary stress with the thickness of 0.5mm is lower than the others. This work is very helpful to manufacture reasonable shaped valvular leaflets and to prolong the lifetime of the bioprosthetic heart valve.

The Material Nonlinear Analysis of Bioprosthetic Heart Valve on Suture Densities

2013 ◽  
Vol 421 ◽  
pp. 23-28
Author(s):  
Xia Zhang ◽  
Quan Yuan ◽  
Jun Zhang ◽  
Xu Huang ◽  
Hua Cong
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Behavior ◽  
Heart Valve ◽  
Computer Aided Design ◽  
Parametric Models ◽  
Nonlinear Material ◽  
Bioprosthetic Heart Valve ◽  
Element Analysis ◽  
The Finite Element Analysis

In order to investigate the effect of suture density on the dynamic behavior of bioprosthetic heart valve with nonlinear material and improve long term durability of bioprosthetic heart valve, we establish the ellipsoidal leaflets and paraboloidal leaflets models via computer aided design. Based on the parametric models of the heart valve, four kinds of suture density (100,70,50 and 35 suture points on the attachment edge of the bioprosthetic heart valve) are analyzed by using finite element method. The finite element analysis results are compared with each valve model. It shows that suture density has a significant effect on the dynamic behavior of the bioprosthetic heart valve, which lead to different stress peak values, different stress distributions and deformation. The finite element analysis of the BHV could provide direct and useful information for the BHV designer.

Suture Density Study of the Bioprosthetic Heart Valve

2012 ◽  
Vol 157-158 ◽  
pp. 935-939
Author(s):  
Yi Hao Zheng ◽  
Xin Ye
Keyword(s):  
Mechanical Properties ◽  
Heart Valve ◽  
Computer Aided Design ◽  
Mechanical Performance ◽  
Stress Distributions ◽  
Bioprosthetic Heart Valve ◽  
Element Analysis ◽  
Aided Design ◽  
Density Study

In order to investigate the effect of the suture density on the mechanical properties of bioprosthetic heart valve, we establish the spherical leaflets models via computer aided design. Finite element analysis is used simulate the mechanical performance of bioprosthetic heart valve when leaflet is closed. The analysis results show that suture density has a significant effect to the stress state of valve, which may lead not only to different stress peak values, but also to different stress distributions. High or low density suture isn’t appropriate for long-term durability of the bioprosthetic heart valve. Suture density tests are needed to perform on the valves to find satisfactory suture density for better mechanical properties of the bioprosthetic heart valve.

Dynamic Analysis of Three Types of Bioprosthetic Heart Valves

2011 ◽  
Vol 71-78 ◽  
pp. 2683-2688
Author(s):  
Xin Ye ◽  
Quan Yuan ◽  
Hua Cong ◽  
Hai Bo Ma ◽  
Dong Liang Wei
Keyword(s):  
Stress Distribution ◽  
Heart Valve ◽  
Computer Aided Design ◽  
Heart Valves ◽  
Mechanical Performance ◽  
Bioprosthetic Valve ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Diastolic Phase ◽  
Von Mises

This paper constructs three types of bioprosthetic valve leaflets’ parametric model via computer aided design, a series of accurate parameters of the bioproshtetic heart valve, such as radius of the sutural ring, height of the supporting stent and inclination of the supporting stent, are determined. Numerical simulation is used to determine the effect of different shape designs on the mechanical performance of the bioprosthetic valve leaflet. The dynamic behavior of the valve during diastolic phase is analyzed. The finite element analysis results show the stress distribution of the ellipsoidal and spherical valve leaflets are comparatively reasonable. The ellipsoidal and spherical valve leaflets have the following advantages over the cylindrical leaflet valve, lower peak von-Mises stress, smaller stress concentration area, and relatively uniform stress distribution. The ellipsoidal and spherical valve leaflets may contribute to the long term durability of the valve. This work is very helpful to manufacture valvular leaflets with reasonable shapes and to prolong the lifetime of the bioprosthetic heart valve.

Influence of Different Shapes to the Dynamic Mechanical Properties of Bioprosthetic Heart Valve

2012 ◽  
Vol 500 ◽  
pp. 417-422
Author(s):  
Xu Huang ◽  
Quan Yuan ◽  
Cheng Rui Zhang ◽  
Hai Bo Ma ◽  
Xin Ye
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Heart Valve ◽  
Dynamic Mechanical Properties ◽  
Bioprosthetic Heart Valve ◽  
Element Analysis ◽  
Geometrical Features ◽  
The Finite Element Analysis ◽  
Different Shapes

The stress with different shapes of the same thickness of the leaflet under the same load is analysed and compared by us. We create the spherical and ellipsoidal curved surface in accordance with geometrical features. The experimental results of the finite element analysis show that stress distribution of the different bioprosthetic heart valve leaflets with the same thickness is different. This work is very helpful to manufacture reasonable shaped valvular leaflets and to prolong the lifetime of the bioprosthetic heart valve.

The Effect of Bioprosthetic Heart Valve with Different Suture Densities

2014 ◽  
Vol 590 ◽  
pp. 819-822
Author(s):  
Xia Zhang ◽  
Quan Yuan ◽  
Xu Huang
Keyword(s):  
Heart Valve ◽  
Computer Aided Design ◽  
Numerical Models ◽  
The Other ◽  
Stress Distributions ◽  
Bioprosthetic Heart Valve ◽  
Computer Aided ◽  
Von Mises ◽  
Aided Design ◽  
Design Stress

This study is to prolong the life of bioprosthetic heart valve. Bioprosthetic heart valve numerical models are established via computer aided design. Stress distribution of bioprosthetic heart valve leaflets with different suture densities are analyzed based on finite element method. The results show that suture density has a significant effect on the dynamic behavior of the bioprosthetic heart valve, which lead to different stress peak values, different stress distributions and deformation. The stress distributions of the cylindrical valve leaflets with different suture density is quite different and the peak von-Mises with 50 suture points is lower than the other three kinds of suture density. This work can be very helpful when manufacturing the bioprosthetic heart valve.

scholarly journals Review on Analysis and Optimization of Piston of IC Engine

2021 ◽  
pp. 57-61
Author(s):  
Mr. Ratnakar Lande ◽  
Prof. Prashant Awachat ◽  
Prof. Tejpal Parshiwanikar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Computer Aided Design ◽  
Combustion Process ◽  
Element Analysis ◽  
Ic Engine ◽  
The Finite Element Analysis ◽  
Computer Aided ◽  
Aided Design

FEA is used in this research to describe the stress distribution of a seizure on a piston four stroke engine. Computer-aided design (CAD) software is used to do the finite element analysis. The major goal is to explore and analyse the thermal stress distribution of the piston during the combustion process in a real engine. The mesh optimization is described in this study, which uses a finite element analysis technique to anticipate the component's greater stress and critical region. The piston's upper end, which includes the piston head/crown, as well as the piston skirt and sleeve, is optimised to reduce stress concentration. The structural model of a piston will be developed using computer-aided design (CAD) and Pro/ENGINEER software. Furthermore, the finite element analysis was carried out with the ANSYS software.

Dynamic Analysis of the Bioprosthetic Heart Valve on Different Fixation

2011 ◽  
Vol 110-116 ◽  
pp. 2342-2347 ◽  
Author(s):  
Xin Ye ◽  
Quan Yuan ◽  
Hua Cong ◽  
Shuo Wang
Keyword(s):  
Stress Distribution ◽  
Dynamic Behavior ◽  
Heart Valve ◽  
Computer Aided Design ◽  
Mechanical Performance ◽  
Bioprosthetic Valve ◽  
Von Mises Stress ◽  
Bioprosthetic Heart Valve ◽  
Element Analysis

This paper constructs the bioprosthetic valve leaflets’ parametric model via computer aided design, a series of accurate parameters of the bioproshtetic heart valve, such as such as radius of the sutural ring, height of the supporting stent and inclination of the supporting stent, are determined. Numerical simulation is used to determine the effect of different shape designs and attachment edge fixed ways on the mechanical performance of the bioprosthetic valve leaflet. The dynamic behavior of the valve during diastolic phase is analyzed. The finite element analysis results show that the stress distribution of the ellipsoidal leaflet valve is comparatively reasonable. The ellipsoidal leaflet valve has the following advantages over the cylindrical leaflet valve, lower peak von Mises-stress, smaller stress concentration area, and relatively uniform stress distribution. The different ways of the attachment edge fixed also have a significant effect on the dynamic behavior of the valve. Attachment edge with some degrees of rotation when seamed to the stent can act to reduce the pressure and make the stress distribution reasonable. Reasonable attachment edge fixation may contribute to the long term durability of the valve. This indicates the need to account for the attachment edge seamed way, when manufacturing the bioproshetic heart valve with long term durability. This work is very helpful to manufacture valvular leaflets with reasonable shapes and to prolong the lifetime of the bioprosthetic heart valve.

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