Buckling analysis of laminated sandwich beam with soft core

Chakrabarti, Anupam; Chalak, H. D.; Iqbal, M.A.; Sheikh, Abdul Hamid

doi:10.1590/s1679-78252012000300004

Cited by 16 publications

(10 citation statements)

References 47 publications

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“…Navier-type closed-form solutions are obtained for simply supported isotropic, laminated composite, and sandwich beams. The results of displacements, stresses, natural frequencies, and critical buckling loads are compared with the theories existing in literature [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58] to demonstrate the accuracy of the proposed theory.…”

Section: Not Consideredmentioning

confidence: 99%

Effect of thickness stretching on the static deformations, natural frequencies, and critical buckling loads of laminated composite and sandwich beams

Sayyad

Ghugal

2018

J Braz. Soc. Mech. Sci. Eng.

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The present study investigates the bending, buckling, and vibration responses of shear deformable laminated composite and sandwich beams using trigonometric shear and normal deformation theory. The most important feature of the present theory is that it includes the effects of transverse shear and normal deformations, i.e., the effect of thickness stretching. Therefore, the theory is also called as a quasi-2D theory. The axial displacement uses sine function in terms of the thickness coordinate to include the effect of transverse shear deformation, and the transverse displacement uses cosine function in terms of the thickness coordinate to include the effect of transverse normal deformation, i.e., the thickness stretching. The present theory satisfies the zero shear stress conditions at top and bottom surfaces of the beam without using shear correction factor. Governing differential equations and associated boundary conditions of the theory are derived by employing the dynamic version of principle of virtual work. Navier-type closed-form solutions are obtained for simply supported boundary conditions. The numerical results are obtained for deflections, stresses, natural frequencies, and critical buckling loads for isotropic, laminated composite, and sandwich beams. Since exact elasticity solutions for laminated composite and sandwich beams are not available in the literature, the results are compared with those obtained by using other higher-order shear deformation theories to demonstrate the accuracy of the proposed theory.

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Section: Not Consideredmentioning

confidence: 99%

Effect of thickness stretching on the static deformations, natural frequencies, and critical buckling loads of laminated composite and sandwich beams

Sayyad

Ghugal

2018

J Braz. Soc. Mech. Sci. Eng.

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“…The structural behavior of sandwich laminated composites cannot be assessed satisfactorily by FOSDT, as the core and face sheets deform in different ways due to wide variation of their material properties, which is identified by a kink in the variation of in-plane displacements across the thickness at the interface between the core and stiff face layers. 20 Therefore, to predict actual shear stress variation across the thickness of the sandwich beam, a shear correction factor is required. However, the value of shear correction factors depends on various parameters such as lamination sequence, loading, and boundary conditions, etc.…”

Section: Introductionmentioning

confidence: 99%

Novel higher-order zigzag theory for analysis of laminated sandwich beams

Garg

Chalak

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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In the present work, a new higher-order zigzag theory is proposed for the analysis of laminated sandwich beams under static and free vibration conditions. Fourth-order in-plane and transverse displacement fields are chosen along with linear unit Heaviside step function. The present theory satisfies interlaminar transverse stress continuity conditions along with zero value at the top and bottom surface for transverse shear stresses. The proposed approach is also free from any kind of C-1 or penalty requirements. A three-noded one-dimensional finite element having eight degrees of freedom per node is used during analysis. The efficiency of the proposed model is carried out by comparing the present results with those available based on elasticity solutions and zigzag theories in the literature. New results are also reported in the present work, which will serve as a benchmark for future studies. The influence of boundary condition on the nature of stress distribution across the length of beam and frequencies of the beam with different end conditions is also carried out. A comparative study has also been carried out between symmetric and unsymmetric laminated sandwich beam.

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“…They compared their simulation results and experimental results with various thickness of foam and bottom face constrained. Chakrabarti et al [9] presented buckling analysis of soft-core sandwich beam using the co-efficient FE model and calculated critical buckling loads for multi-layered sandwich beam having soft-core. The behavior of sandwich structures [10][11] and recent FE studies [12][13][14][15][16][17][18][19][20][21][22][23][24][25] have been studies by many researchers.…”

Section: Introductionmentioning

confidence: 99%

Buckling Behavior of Sandwich Panel with Isotropic Core and Orthotropic Faces

Arshad,

Chaubey

2020

IJEAT

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A sandwich panel is a lightweight structure, economical and having low thermal conductivity. It is made up of three layers in which the middle layer is called core which is bounded with thin layers at top and bottom called faces. Generally, the core has relatively low-density which makes it lightweight. The buckling load analysis of sandwich panel having isotropic core and orthotropic faces is studied for different support conditions using the FE based software ABAQUS. The FE model is validated with suitable published results. Then it is used to find critical buckling load of sandwich panel with isotropic core and orthotropic faces. Many new results have been presented for different thickness, end conditions, aspect ratio, etc.

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Buckling analysis of laminated sandwich beam with soft core

Cited by 16 publications

References 47 publications

Effect of thickness stretching on the static deformations, natural frequencies, and critical buckling loads of laminated composite and sandwich beams

Effect of thickness stretching on the static deformations, natural frequencies, and critical buckling loads of laminated composite and sandwich beams

Novel higher-order zigzag theory for analysis of laminated sandwich beams

Buckling Behavior of Sandwich Panel with Isotropic Core and Orthotropic Faces

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