Tear and decohesion of bovine pericardial tissue
| Autor: | Jean Yves Bourges, Gustavo V. Guinea, J. M. Atienza, Manuel Elices, Francisco J. Rojo, Almudena Tobaruela |
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| Rok vydání: | 2016 |
| Předmět: |
Toughness
Materials science Bovine pericardium 0206 medical engineering Biomedical Engineering 02 engineering and technology Orthotropic material Biomaterials Stress (mechanics) Fracture toughness Tearing medicine Animals Pericardium Composite material Bioprosthesis Delamination 021001 nanoscience & nanotechnology 020601 biomedical engineering eye diseases medicine.anatomical_structure Mechanics of Materials Heart Valve Prosthesis Cattle 0210 nano-technology |
| Zdroj: | Journal of the Mechanical Behavior of Biomedical Materials. 63:1-9 |
| ISSN: | 1751-6161 |
| DOI: | 10.1016/j.jmbbm.2016.06.002 |
| Popis: | The aim of this study was to evaluate quantitatively the fracture—by tear and delamination—of bovine pericardium tissues which are usually employed for the manufacture of bioprosthetic valves. A large number of samples (77) were tested in root-to-apex and circumferential directions, according to a standardised tear test (ASTM D 1938). Before performing the tear test, some samples were subjected to 1000 cycles of fatigue to a maximum stress of 3 MPa. Fracture toughness of tearing and delamination were computed by following a simple fracture model. The study showed significantly lower values of delamination toughness compared with tear delamination. Moreover, tear forces were different in each test direction, revealing a clear orthotropic behaviour. All these results, as well as the testing procedure, could be of value for future research in the physiological function of pericardium tissues and clinical applications. |
| Databáze: | OpenAIRE |
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