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fallah-ragabzadeh--famida
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Stability of Coronary Arteries Arteriosclerosis Using Fluid-Structure Interaction
, M.Sc. Thesis Sharif University of Technology ; Fallah Ragabzadeh, Famida (Supervisor)
Abstract
Coronary arteries often experience tortuosity under internal blood pressure and longitude axial twisting. Arterial tortuosity can enhance the stress concentration on the artery walls. Now if the coronary arteries suffer from atherosclerosis (a common disease among adults) the stress concentration on the tortuous artery plaque will be enhanced as well. Increased stress on the plaque may result in plaque rupture and its consequent damages. This study aims to investigate the stress concentration on the plaques and blood flow patterns within the coronary arteries with plaque. Moreover, the plaque growth was predicted taking into account various geometrical parameters including fibrous cap...
Buckling Analysis of FG and Multilayered Cylindrical Shells Based on Third-Order Shear Deformation Theory
, M.Sc. Thesis Sharif University of Technology ; Fallah Ragabzadeh, Famida (Supervisor) ; Zohoor, Hassan (Supervisor)
Abstract
In this study, based on Donnel’s shell theory and the theory of third-order shear deformation, and taking into consideration von Karman non-linearity terms, the analysis of buckling of functionally graded (FG) and multi-layered cylindrical shell with transversely isotropic layers, subjected to different loadings, was done. Along this line, first using the principle of minimum total potential energy, and based on the Donnel’s shell theory and the theory of third-order shear deformation, five couple equilibrium equations for cylindrical shell were produced. Next these five coupled equilibrium equations were reduced to three uncoupled equilibrium equation which are, in terms of transverse...