Free vibration analysis of rotating pretwisted composite sandwich conical shells with multiple debonding in hygrothermal environment

Singha, Tripuresh Deb; Rout, Mrutyunjay; Bandyopadhyay, Tanmoy; Karmakar, Amit

doi:10.1016/j.engstruct.2019.110058

Cited by 53 publications

(15 citation statements)

References 53 publications

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“…The pretwisted sandwich conical shell panel having reference width b 0 is fixed at the periphery of a stiff hub of radius r rotating with a rotational speed X about zÀaxis as depicted in Figure 2. The mid-surface of the shallow sandwich conical shell is defined by 79,86…”

Section: Pretwisted Shell Modelmentioning

confidence: 99%

Thermoelastic free vibration of rotating pretwisted sandwich conical shell panels with functionally graded carbon nanotube-reinforced composite face sheets using higher-order shear deformation theory

Singha¹,

Bandyopadhyay

Karmakar

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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This article presents a numerical investigation on the free vibration characteristics of rotating pretwisted sandwich conical shell panels with two functionally graded carbon nanotube-reinforced composite (FG-CNTRC) face sheets and a homogeneous core in uniform thermal environments. The carbon nanotubes are considered to be aligned with the span length and distributed either uniformly or functionally graded along the thickness of the sandwich conical shell panel. The material properties of FG-CNTRC face sheets and homogenous core are assumed to be temperature-dependent and computed employing micromechanics models. The shallow conical shell is modeled using finite element method within a framework of the higher-order shear deformation theory. Lagrange’s equation of motion is employed to derive the dynamic equilibrium equations of sandwich conical shell panels rotating at moderate rotational speeds wherein Coriolis effect is neglected. Computer codes are developed on the basis of present mathematical formulation to determine the natural frequencies of the sandwich conical panels. Convergence and comparison studies are performed to examine the consistency and accurateness of the present formulation. The numerical results are presented to analyze the effects of various parameters on the natural frequencies of the pretwisted FG-CNTRC sandwich conical shell panels under different thermal conditions.

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Section: Pretwisted Shell Modelmentioning

confidence: 99%

Thermoelastic free vibration of rotating pretwisted sandwich conical shell panels with functionally graded carbon nanotube-reinforced composite face sheets using higher-order shear deformation theory

Singha¹,

Bandyopadhyay

Karmakar

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…In addition, the geometric and natural boundary conditions for simply supported conical shells are, respectively, as shown in Eqs. (30) and (31) [32,38]:…”

Section: Extraction Of Vibration Equationsmentioning

confidence: 99%

“…Shakouri [30] has investigated vibration of rotating conical shells from functionally graded materials considering their temperature dependency features. Singha et al [31] have dealt the effect of elevated temperature and also moisture absorption on the vibration responses of rotating pretwisted sandwich conical shells.…”

Section: Introductionmentioning

confidence: 99%

Active vibration control of rotating laminated composite truncated conical shells through magnetostrictive layers based on first-order shear deformation theory

Mohammadrezazadeh

Jafari

2020

J Braz. Soc. Mech. Sci. Eng.

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In this paper, for the first time active vibration control of rotating laminated composite truncated conical shells containing magnetostrictive layers by employing first-order shear deformation theory is investigated. The active vibration control task is done through magnetostrictive layers employing velocity feedback control law. The effects of initial hoop tension and centrifugal and Coriolis forces are considered in extraction of the partial differential equations through Hamilton principle. The ordinary differential equations are derived by employing modified Galerkin method. This study agrees with the mentioned results of the literature. Finally, the effects of several parameters on the vibration suppression are investigated.

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“…Moleiro et al [11] developed a new layerwise mixed model which is based on a mixed least-squares formulation for the coupled hygro-thermo-mechanical static analysis of multilayered plates. Singha et al [12] studied the influence of elevated temperature and moisture absorption on the free vibration behavior of rotating pre-twisted sandwich conical shells which include two composite face-sheets and a synthetic foam core. Fracture problems of hygrothermoelastic media with cracks are particularly significant for the understanding of the performance of materials.…”

Section: Introductionmentioning

confidence: 99%

Transient response of hygrothermoelastic field in an elastic plate with an edge crack

Zhang

2020

Z Angew Math Mech

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In order to describe the complex interaction in the heat and moisture transfer process, a coupled time‐fractional hygrothermal theory is developed to describe the anomalous phenomenon of coupled heat and moisture diffusion. The hygrothermoelastic behaviors in a plate with an edge crack are investigated. The surfaces of the plate are both subjected to hygrothermal shocks. The Laplace transform and the finite Fourier transform are applied to seek an analytical solution of temperature change, moisture distribution, and stress response that are expressed in terms of the Mittag‐Leffler function. With this solution, the stress intensity factors at the crack tip are numerically calculated through the weight function method. The coupling effects of the heat and moisture on the stress intensity factors are illustrated graphically for sub‐diffusion, normal diffusion, and super‐diffusion respectively. The results show that the coupling hygrothermal effects are significant and different when compared with the uncoupled model.

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Free vibration analysis of rotating pretwisted composite sandwich conical shells with multiple debonding in hygrothermal environment

Cited by 53 publications

References 53 publications

Thermoelastic free vibration of rotating pretwisted sandwich conical shell panels with functionally graded carbon nanotube-reinforced composite face sheets using higher-order shear deformation theory

Thermoelastic free vibration of rotating pretwisted sandwich conical shell panels with functionally graded carbon nanotube-reinforced composite face sheets using higher-order shear deformation theory

Active vibration control of rotating laminated composite truncated conical shells through magnetostrictive layers based on first-order shear deformation theory

Transient response of hygrothermoelastic field in an elastic plate with an edge crack

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