Developing the Nonlinear Model of Single-Cell Thin-Walled Closed-Section Composite Beams

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Darbaniyan, Faezeh | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47641 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Dehghani Firoozabadi, Rouhollah
Abstract:
The purpose of this study is to develop the reduced order nonlinear modeling of single cell closed section thin walled composite beams. In this way, global behavior of one dimensional beam under axial load, bending and torsional moment is produced. This model is based on the classical lamination theory, and the nonlinear model is developedby usingthe von-karman strains. In this process the effects of material anisotropy and axial warping are considered. Numerical results are obtained for thin-walledcomposites box beams, addressing the effects of fiber angle and laminate stacking sequence. The nonlinear model is compared with theoretical results of homogeneous beams and the natural frequencies are evaluated with Nastran results. The comparison of the results with FEMfor symmetric stacking sequence showed thatthe results are in good accordance
Keywords:
Composite Beam ; Nonlinear Model ; Von Karman Theory ; Reduced Order Model ; Thin Walled Composite Beam ; Thin Walled-closed Section ; Single Cell Section ; Van Karman Strain

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