Buckling of Laminated Composite Truncated Conical Shells with Variable Thickness

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Kazemi, Mohammad Erfan | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47974 (08)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Koochakzadeh, Mohammad Ali
Abstract:
In the present study, the buckling of generally laminated truncated conical shells having thickness variation expressed by a linear function, subjected to axial compression with simply or clamped supports has been considered. To begin with, the fundamental relations for a conical shell with variable thickness have been derived applying thin-walled shallow shell theory of Donnell-type and theorem of minimum potential energy; non-linear terms of Donnell equations by the help of adjacent-equilibrium criterion are linearized. Governing equations are solved using power series method and are applicable for all combinations of classical boundary conditions. The results are validated with Galerkin method and the available results in the literature. Effects of thickness function parameter, semi-vertex angle, lamination sequanece, length to diameter ratio, and initial thickness on the buckling load and mode are investigated. It is observed that these parameters have considerable effects on the buckling load of a conical shell
Keywords:
Power Series ; Variable Thickness ; Buckling ; Conical Shell ; Galerkin Method ; Laminated Conical Shell

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