Thermal Local Buckling of Metal Truncated Conical Shells with Composite Rainforced Layers by Finite Element Method

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Merati, Ali | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46072 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Hosseini Kordkheili, Ali
Abstract:
In this study, the thermal buckling behavior of thin metal liner reinforced by composite shell in present of the initial imperfection is investigated. For this purpose, the Ryzener – Myndlyn shear-deformation theory & the virtual work method are used to extract equilibrium equations. In this work, the conical shell with c-c, s-s, c-f boundary conditions has been studied. The outer layer of reinforced composite is exposed to constant ambient temperature and iner layer is exposed to heat. Metal liner and reinforced composite shell are merged with together. In other words, the degrees of freedom at each node for both shells are assumed to be equal. Solution method is finite element method using 8-node shell element with five degrees of freedom. In this end, a code was developed as an analysis tool. Data as a file is imported to this code. Some of this data are: the material of each layer, mark of nodes per element and the coordinates of each node.
In this work, the effect of sizes and positions of imperfection on thermal buckling behavior has been studied. This case is the main reason for this thesis
Keywords:
Cone ; Liner ; Composite ; Finite Element Method ; Thermal Buckling

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