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Definition of principal material directions in the abdominal aortic aneurysms
Bartoňová, Petra ; Slažanský, Martin (referee) ; Polzer, Stanislav (advisor)
This bachelor thesis deals with definitions of principal material directions in idealized geometrical models. The theoretical part is particularly focused on general information of vascular system and abdominal aortic aneurysms in the field of anatomy, histology and surgery, afterwards it is concentrated on the biomechanical point of view. Consequently, the created algorithm is described and used to compare different definitions of principal directions considering the maximum principal stress. In conclusion, the results of FEM analyses are evaluated with respect to further study of this issue.
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Determination of principal material directions in tissues of aortic wall
Bogdan, Miloš ; Fedorova, Svitlana (referee) ; Burša, Jiří (advisor)
Main goal of this thesis is to find a way how to determine principal material directions in the tissues of aortic wall at large strains. A method is designed for this purpose on the basis of same principles as the method of detemination of principal strains and their directions using rosette gauges. These principles are consequences of tensor properties. In this work the method is applied for a stiffness tensor instead of strain tensor. An algorithm that calculates with this new method is also made and the required experiments are realised on three samples of porcine aorta. Principal material directions and deviations of the values are calculated for both small and large strains.
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Definition of principal material directions in the abdominal aortic aneurysms
Bartoňová, Petra ; Slažanský, Martin (referee) ; Polzer, Stanislav (advisor)
This bachelor thesis deals with definitions of principal material directions in idealized geometrical models. The theoretical part is particularly focused on general information of vascular system and abdominal aortic aneurysms in the field of anatomy, histology and surgery, afterwards it is concentrated on the biomechanical point of view. Consequently, the created algorithm is described and used to compare different definitions of principal directions considering the maximum principal stress. In conclusion, the results of FEM analyses are evaluated with respect to further study of this issue.
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Determination of principal material directions in tissues of aortic wall
Bogdan, Miloš ; Fedorova, Svitlana (referee) ; Burša, Jiří (advisor)
Main goal of this thesis is to find a way how to determine principal material directions in the tissues of aortic wall at large strains. A method is designed for this purpose on the basis of same principles as the method of detemination of principal strains and their directions using rosette gauges. These principles are consequences of tensor properties. In this work the method is applied for a stiffness tensor instead of strain tensor. An algorithm that calculates with this new method is also made and the required experiments are realised on three samples of porcine aorta. Principal material directions and deviations of the values are calculated for both small and large strains.
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