Loading...
Please wait, while we are loading the content...
Similar Documents
A nonlinear anisotropic model for porcine aortic heart valves.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Li, Jing Luo, X. Y. Kuang, Zulkefly |
| Copyright Year | 2001 |
| Abstract | The anisotropic property of porcine aortic valve leaflet has potentially significant effects on its mechanical behaviour and the failure mechanisms. However, due to its complex nature, testing and modelling the anisotropic porcine aortic valves remains a continuing challenge to date. This study has developed a nonlinear anisotropic finite element model for porcine heart valves. The model is based on the uniaxial experimental data of porcine aortic heart valve leaflet and the properties of nonlinear composite material. A finite element code is developed to solve this problem using the 8-node super-parameter nonlinear shells and the update Lagrangian method. The stress distribution and deformation of the porcine aortic valves with either uniform and non-uniform thicknesses in closed phase and loaded condition are calculated. The results showed significant changes in the stress distributions due to the anisotropic property of the leaflets. Compared with the isotropic valve at the same loading condition, it is found that the site of the peak stress of the anisotropic leaflet is different; the maximum longitudinal normal stress is increased, but the maximum transversal normal stress and in-plane shear stress are reduced. We conclude that it is very important to consider the anisotropic property of the porcine heart valves in order to understand the failure mechanism of such valves in vivo. |
| Starting Page | 281 |
| Ending Page | 281 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.maths.gla.ac.uk/~xl/JBioM01.pdf |
| PubMed reference number | 11522307v1 |
| Volume Number | 34 |
| Issue Number | 10 |
| Journal | Journal of biomechanics |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Aortic valve disorder Aortic valve structure Heart Valve Leaflet Device Component Heart Valves Heart failure Heart valve disease Population Parameter Porcine species shear stress |
| Content Type | Text |
| Resource Type | Article |
