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National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
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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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.
Detailed record
Tangenciální moduly pro Greenův-Lagrangeův a levostranný Henckyho popis odvozené z deformační energie při velkých deformacích
 Poživilová, Alena ; Plešek, Jiří
Tangent moduli associated with the linear logarithmic model of hyperaelasticity are derived. These moduli as functions of stress determine the speed of propagating acoustic waves.
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