Buckling of composite sandwich cylindrical shell with lattice anisogrid core under hydrostatic pressure

Anisogrid structural elements offer significant advantages over conventional stringer-stiffened analogues due to an exceptional strength and stiffness of unidirectional composite ribs, which are used as the main load-bearing elements. The paper presents a numerical solution for buckling of a sandwic...

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Bibliographic Details
Published in:Journal of physics. Conference series 2020-05, Vol.1546 (1), p.12139
Main Authors: Shatov, A V, Burov, A E, Lopatin, A V
Format: Article
Language:English
Subjects:
Buckling
Coupled modes
Cylindrical shells
Finite element method
Hydrostatic pressure
Lattice vibration
Load bearing elements
Parameters
Parametric analysis
Stiffness
Stringers
Structural members
Unidirectional composites
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Summary:Anisogrid structural elements offer significant advantages over conventional stringer-stiffened analogues due to an exceptional strength and stiffness of unidirectional composite ribs, which are used as the main load-bearing elements. The paper presents a numerical solution for buckling of a sandwich cylindrical shell with composite lattice core loaded with hydrostatic pressure. To model the buckling of the shell, the finite element method is used. A parametric analysis on the effect of the number of helical ribs and the orientation angle on the critical hydrostatic pressure is performed. It is revealed that the local, global or coupled buckling modes can be realized in the buckled shell depending on the geometric parameters of the lattice core structure. The parameters at which the shell provides the maximum mass efficiency are determined.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1546/1/012139