Analytical investigation on mechanical buckling of FGM truncated conical shells reinforced by orthogonal stiffeners based on FSDT

Dung, Dao Van; Chan, Do Quang

doi:10.1016/j.compstruct.2016.10.006

Cited by 61 publications

(9 citation statements)

References 50 publications

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“…Several other researches can be found in the literature dealing with the Buckling and thermal stability of the functionally graded conical shells stiffened with orthogonal stiffeners. 5,6 However, rare investigations have been carried out about the buckling behavior of composite lattice conical shells with helical stiffeners. [7][8][9] A full literature review of recent works on the free vibrational and buckling behavior of stiffened conical shells have been given in a series of papers by Zarei et al [10][11][12] and will not be repeated here, and the literature review will be hereafter focused on the application of the VCT for these structures.…”

Section: Remarks and Motivations Of The Researchmentioning

confidence: 99%

A nondestructive approach to predict buckling load of composite lattice-core sandwich conical shells based on vibration correlation technique

Zarei

Rahimi

2022

Jnl of Sandwich Structures & Materials

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In this paper the vibration correlation technique (VCT) has been used as a nondestructive method for predicting the buckling load of the composite lattice-core sandwich conical shells. This technique is capable of predicting the buckling load of different structures without reaching the failure point through modal testing. The composite lattice-core sandwich conical shell has been fabricated using a filament winding process. To perform the expriment, the fundamental natural frequency of the specimen is measured under stepped axial compression loading. The procedure is followed up without actually reaching the instability point when the structure collapses and is no longer usable. A finite element model has also been built in ABAQUS in order to determine the correlation between natural frequency and applied compressive load. A comparison of the results indicated that the VCT has provided a reliable estimate of the buckling load of composite lattice-core sandwich conical shells, especially when the structure is loaded up to at least 66% of the experimental buckling load and accuracy of the VCT decreases when the maximum load is lower than 43% of the buckling load. Results also revealed that the linear fitted curve is unsuitable for the correlation between frequency of vibration and applied load in order to predict buckling load.

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Section: Remarks and Motivations Of The Researchmentioning

confidence: 99%

A nondestructive approach to predict buckling load of composite lattice-core sandwich conical shells based on vibration correlation technique

Zarei

Rahimi

2022

Jnl of Sandwich Structures & Materials

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“…As is different from the available works [55,56], where the discrete stiffener are smeared out over the respective spacing, in the present paper, we model the stiffeners as Euler-Bernoulli beams under the hypothesis that normals to the cylindrical shell and stiffeners remain normal after the deflection. Thus, following the Kirchhoff-Love classical assumptions [52] the displacement field can be expressed as…”

Section: Fundamental Equationsmentioning

confidence: 99%

Thermal Buckling of Nanocomposite Stiffened Cylindrical Shells Reinforced by Functionally Graded Wavy Carbon Nanotubes with Temperature-Dependent Properties

et al. 2017

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Abstract:We study the thermal buckling behavior of cylindrical shells reinforced with Functionally Graded (FG) wavy Carbon NanoTubes (CNTs), stiffened by stringers and rings, and subjected to a thermal loading. The equilibrium equations of the problem are built according to the Third-order Shear Deformation Theory (TSDT), whereas the stiffeners are modeled as Euler Bernoulli beams. Different types of FG distributions of wavy CNTs along the radial direction of the cylinder are herein considered, and temperature-dependent material properties are estimated via a micromechanical model, under the assumption of uniform distribution within the shell and through the thickness. A parametric investigation based on the Generalized Differential Quadrature (GDQ) method aims at investigating the effects of the aspect ratio and waviness index of CNTs on the thermal buckling of FG nanocomposite stiffened cylinders, reinforced with wavy single-walled CNTs. Some numerical examples are here provided in order to verify the accuracy of the proposed formulation and to investigate the effects of several parameters-including the volume fraction, the distribution pattern of wavy CNTs, and the cylinder thickness-on the thermal buckling behavior of the stiffened cylinders made of CNT-reinforced composite (CNTRC) material.

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“…In the field of mechanical response of conical shell, Demir et al [2] presented buckling of conical shells utilizing Donnell theory of shell and method of discrete singular convolution. Van Dung and Quang Chan [3] studied buckling behavior of functionally graded (FG) conical truncated shells under the external uniform pressure using exact solution. Thermo-mechanical buckling of a FG truncated conical shell armed by carbon nanotubes (CNTs) were investigated by Duc et al [4].…”

Section: Introductionmentioning

confidence: 99%

Optimization of dynamic properties for laminated multiphase nanocomposite sandwich conical shell in thermal and magnetic conditions

Kolahchi

Keshtegar

Nguyen-Thoi

2021

Jnl of Sandwich Structures & Materials

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This paper extends an optimization procedure to obtain the optimal dynamic properties of laminated sandwich multiphase nanocomposite truncated conical shell under magneto-hygro-thermal conditions. Based on principle of Hamilton, the equations of motion are obtained and solved by differential quadrature method and Bolotin's methods for obtaining the dynamic stability region. Based on particle swarm optimization and harmony search algorithms, a novel hybrid optimization method basis HS and PSO is proposed to enhance the performance and convergence of optimum dynamic conditions in this problem. By applying the hybrid optimization algorithm namely as HS-PSO, the volume percent of CNT and carbon fiber, number of laminas, cone semi vertex angle and moisture changes are optimized and the effects of magnetic field and temperature are shown on the dynamic stability of system. The result illustrates that proposed PSO-HS method with same conditions by other optimization methods as harmony memory size (number of particles) of 5 and total iterations of 100 shows the superior convergence performance compare to HS and PSO algorithms.

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Analytical investigation on mechanical buckling of FGM truncated conical shells reinforced by orthogonal stiffeners based on FSDT

Cited by 61 publications

References 50 publications

A nondestructive approach to predict buckling load of composite lattice-core sandwich conical shells based on vibration correlation technique

A nondestructive approach to predict buckling load of composite lattice-core sandwich conical shells based on vibration correlation technique

Thermal Buckling of Nanocomposite Stiffened Cylindrical Shells Reinforced by Functionally Graded Wavy Carbon Nanotubes with Temperature-Dependent Properties

Optimization of dynamic properties for laminated multiphase nanocomposite sandwich conical shell in thermal and magnetic conditions

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