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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 48071 (08)
- University: Sharif University of Technology
- Department: Mechanical Engineering
- Advisor(s): Ahmadian, Mohammad Taghi; Firoozbakhsh, Keykhosrow
- Abstract:
- In humans, the heart is roughly the size of a large fist and weighs between about 280 to 340 grams in men and 230 to 280 grams in women. Your body has about 5.6 liters of blood. The human heart is an organ that pumps blood throughout the body via the circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes. Any damage to the heart, will affect on the other organs. They are four valves within the heart, in which aortic valve is the most important and crucial part of the heart. Calcium sediment on aortic valve leaflets causes reduction in the flexibility of the leaflets, one of the most common heart diseases. In this study, the flexibility of the aortic valve leaflets due to calcium sedimentation is investigated. For this purpose, three-dimensional model of the valve is extracted using CT scan of the 33 years old person. The model is imported for simulation and stress analysis using finite element (FE) software. This study shows that large stresses concentration tack place at the bottom of leaflets. As calcium sediment increases, stress concentration also in enhances. Results indicate the overall opening of the valve is contracted and consequently reduces the flow of the blood
- Keywords:
- CT Scan ; Dynamic Analysis ; Finite Element Method ; Aortic Valve ; Calcium Sediment
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