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Bending and Buckling Analysis of Laminated Composite Conical Panel Using GDQ Method
, M.Sc. Thesis Sharif University of Technology ; Kouchakzadeh, Mohammad Ali (Supervisor)
Abstract
This study presents the bending analysis of laminated conical panels under transverse compression with various boundary conditions. Equations was derived using first order shear deformation theory (FSDT) and solved using generalized differential quadrature (GDQ) method. Using this method results in the capability of studying any combinations of boundary conditions on four edges of the panel. Results are compared and validated with the results available in the literature. Effect of boundary conditions, panel length, semi-vertex angle and subtended angle on deflection of the panel was investigated.The buckling analysis of cross-ply laminated conical shell panels with simply supported boundary...
Analytical Solution to Bending of Shape Memory Polymer Beams
, M.Sc. Thesis Sharif University of Technology ; Naghdabadi, Reza (Supervisor) ; Baghani, Mostafa (Co-Advisor)
Abstract
Shape Memory Polymers (SMPs) are a class of smart materials capable of remembering multiple shapes, and transitioning between them in response to an external stimulus such as thermal or magnetic induction. SMPs have attracted significant attention of both industrial and academic researchers due to their useful and attractive functionality. This thesis aims to analytically develop Euler-Bernoulli, Timoshenko and von Karman theories for beam bending in small strain regime considering SMP constitutive equations. To properly introduce analytical solution for the problem of beam bending, the constitutive model proposed by Baghani et al. (2012) has been used. For this purpose, three dimensional...
Investigation of Local Buckling and Prediction of Fracture Onset in Hollow Section Steel Beams
, M.Sc. Thesis Sharif University of Technology ; Alijani Moghaddam, Hassan (Supervisor)
Abstract
In this study, the behavior of cantilevered HSS beams under cyclic bending loading are modeled in order to study the buckling and post buckling behavior have been investigated by Finite Element method.The analytical results are fairly in good agreement with the experimental results. The analysis demonstrates that when local buckling occurs in near of connection area, subsequently, the strain grows severely that is entitled as strain rise and then, is caused fracture. As a result, local buckling limits the ability of these members to form stable plastic hinges and the behavior is highly dependent on the width-thickness (b/t) and the depth-thickness ratio (h/t).Also, the thesis has been tried...