Global buckling analysis of laminated sandwich conical shells with reinforced lattice cores based on the first-order shear deformation theory

Tapered composite plates have various engineering applications such as helicopter yoke, robot arms and turbine blades in which the structure needs to be stiff at one end and flexible at another end. No closed form analytical solution of tapered composite plates using Ritz method based on first-order shear deformation theory (FSDT) is available at present. In the present paper, the buckling analysis of different types of composite plates with longitudinal-internal-ply-drop-off configuration is investigated using Ritz method. The buckling analysis of these plates is also conducted using ANSYS®. The efficiency and accuracy of the developed formulation are established in comparison with available solutions, where applicable. A detailed parametric study has been conducted on various taper and lay-up configurations, all made of NCT/301 graphite-epoxy, in order to investigate the effects of taper angle, length-to-height ratio, length-to-width ratio, boundary conditions, and taper and lay-up configurations.

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Thermal buckling analysis of porous circular plate with piezoelectric actuators based on first order shear deformation theory

International Journal of Mechanical Sciences ◽

10.1016/j.ijmecsci.2014.03.024 ◽

2014 ◽

Vol 83 ◽

pp. 57-64 ◽

Cited By ~ 35

Author(s):

M. Jabbari ◽

E. Farzaneh Joubaneh ◽

A. Mojahedin

Keyword(s):

Shear Deformation ◽

Circular Plate ◽

Deformation Theory ◽

Shear Deformation Theory ◽

Piezoelectric Actuators ◽

Thermal Buckling ◽

Buckling Analysis ◽

First Order

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Buckling of Joined Composite Conical Shells Using Shear Deformation Theory under Axial Compression

Strojniški vestnik – Journal of Mechanical Engineering ◽

10.5545/sv-jme.2019.6146 ◽

2019 ◽

pp. 574-584

Author(s):

Mohammad Hadi Izadi ◽

Hosseini Hashemi Shahrokh ◽

Moharam Habibnejad Korayem

Keyword(s):

Finite Element ◽

Shear Deformation ◽

Axial Compression ◽

Deformation Theory ◽

Separation Of Variables ◽

Shear Deformation Theory ◽

Power Series Method ◽

Buckling Loads ◽

Conical Shells ◽

First Order

This paper investigates critical buckling loads in joined conical shells under axial compression. An analytical approach has been applied to study classical linear buckling of joined cones that are made of cross-ply fiber reinforced laminates. The governing equations have been extracted using first-order shear deformation theory (FSDT), and an analytical solution has been applied to extract critical buckling loads. Accordingly, the system of partial differential equations has been solved via separation of variables using Fourier expansion and power series method. The effects of the number of layers, lamination sequences, semi-vertex angles, shell thicknesses, shell lengths and boundary conditions on the stability of joined cones have been examined. For validation, the specific examples of the present study have been compared to previous studies. Using ABAQUSE/CAE software (a FEM-based software), the results of finite element have been extracted. The present method is in good agreement with the finite element and other research results. Finally, the differences in classical shell theory (CST) of Donnell type and first-order shear deformation theory have been discussed for different shell thicknesses.

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