Degradation mechanism of magnesium alloy stent under simulated human micro-stress environment
| Autor: | Xunyan Yin, Zhi Jia, Li Qinglin, Dexue Liu, Jianjun Liu, Shiwen Hu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Surface Properties Simulated body fluid medicine.medical_treatment Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences Biomaterials Stress (mechanics) Elastic Modulus Materials Testing Fluid–structure interaction Alloys medicine Shear stress Humans Computer Simulation Magnesium Composite material Magnesium alloy Computer simulation Models Cardiovascular Stent Hydrogen-Ion Concentration equipment and supplies 021001 nanoscience & nanotechnology 0104 chemical sciences Corrosion Mechanism (engineering) Mechanics of Materials Stents Shear Strength 0210 nano-technology Software |
| Zdroj: | Materials Science and Engineering: C. 84:263-270 |
| ISSN: | 0928-4931 |
| DOI: | 10.1016/j.msec.2017.12.001 |
| Popis: | In this study, a vascular stent made of WE43 magnesium alloy was used as a research object and placed in a special physical simulation device constructed independently. This device provided a platform for the study of the degradation of the stent in a dynamic environment. The simulated body fluid of Hank's buffered salt solution flowing inside it would not only make the stent corroded but also apply cyclic shear stress to it, which get closer to the micro-stress environment in human blood vessels. In addition, by means of computer numerical simulation software, ANSYS Fluent 15.0, the fluid-structure interaction (FSI) model was established to simulate the wall shear stress (WSS) exerted by the flowing blood on stent in the blood vessel. Combined with the results of numerical simulation and physical simulation experiments, the degradation mechanism of magnesium alloy sent in an environment similar to the human blood vessels was studied. |
| Databáze: | OpenAIRE |
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