Techno Press
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Steel and Composite Structures   Volume 22, Number 2, October10 2016, pages 301-321
DOI: http://dx.doi.org/10.12989/scs.2016.22.2.301
 
Buckling analysis of laminated composite cylindrical shell subjected to lateral displacement-dependent pressure using semi-analytical finite strip method
Majid Khayat, Davood Poorveis and Shapour Moradi

 
Abstract     [Full Text]
    The objective of this paper is to investigate buckling behavior of composite laminated cylinders by using semi-analytical finite strip method. The shell is subjected to deformation-dependent loads which remain normal to the shell middle surface throughout the deformation process. The load stiffness matrix, which is responsible for variation of load direction, is also throughout the deformation process. The shell is divided into several closed strips with alignment of their nodal lines in the circumferential direction. The governing equations are derived based on the first-order shear deformation theory with Sanders-type of kinematic nonlinearity. Displacements and rotations of the shell middle surface are approximated by combining polynomial functions in the meridional direction and truncated Fourier series along with an appropriate number of harmonic terms in the circumferential direction. The load stiffness matrix, which is responsible for variation of load direction, is also derived for each strip and after assembling, global load stiffness matrix of the shell is formed. The numerical illustrations concern the pressure stiffness effect on buckling pressure under various conditions. The results indicate that considering pressure stiffness causes buckling pressure reduction which in turn depends on various parameters such as geometry and lay-ups of the shell.
 
Key Words
    deformation-dependent loads; finite strip method; buckling behavior; laminated composite; cylindrical shells
 
Address
(1) Majid Khayat, Davood Poorveis:
Department of Civil Engineering, Shahid Chamran University of Ahvaz, Iran;
(2) Shapour Moradi:
Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Iran.
 

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