Optimization of CNT/polymer/fiber laminated truncated conical panels for maximum fundamental frequency and minimum cost

Yousefi, Amir Hossein; Memarzadeh, Parham; Afshari, Hassan; Hosseini, Saied Jalil

doi:10.1080/15397734.2021.1945932

Cited by 29 publications

(10 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CNTs agglomeration reduces the elastic constants of a CNT-reinforced polymer and its effects increase by a growth in η or a reduction in μ. 34 According to Equation (10) a growth in the agglomeration parameter η means a higher number of the CNTs are agglomerated and a reduction in the agglomeration parameter μ means there is a higher intensity of the agglomeration inside the clusters. The relations below describe the elastic modulus and the Poisson's ratio of an isotropic material are described in terms of the bulk (K) and shear moduli:…”

Section: Effective Mechanical Propertiesmentioning

confidence: 99%

Effects of non-uniformity in thickness and volume fraction of agglomerated CNTs on the dynamics of a spinning CNT-reinforced nanocomposite truncated conical shell

Amirabadi,

Afshari,

Sarafraz

et al. 2024

Noise & Vibration Worldwide

Self Cite

View full text Add to dashboard Cite

In the presented work, the free vibration analysis of a rotating truncated conical shell whose thickness varies in the meridional direction is examined. The material that the shell is made of is a polymeric matrix (epoxy) enriched with carbon nanotubes (CNTs) whose volume fraction varies in the meridional direction. CNTs agglomeration is considered and the density and elastic constants of such a two-phase nanocomposite are calculated sequentially based on the Eshelby–Mori–Tanaka approach alongside the rule of mixture. The conical shell is modeled using the first-order shear deformation theory (FSDT) including the relative acceleration, Coriolis acceleration, and centrifugal acceleration along with the initial hoop tension, and the governing equations are obtained utilizing Hamilton’s principle. The solution of governing equations is performed via the combination of an analytical solution in the circumferential direction and a numerical one in the meridional direction via the differential quadrature method (DQM). The impacts of several parameters on the forward and backward natural frequencies of such a rotating shell are studied such as chirality, mass fraction and dispersion pattern of the CNTs, thickness variation parameters, and boundary conditions. It is observed that higher natural frequencies and critical rotational speeds can be achieved for CNT-reinforced conical shells when the volume fraction of the CNTs and the thickness of the shell increase from its small radius to the large one.

show abstract

Section: Effective Mechanical Propertiesmentioning

confidence: 99%

Effects of non-uniformity in thickness and volume fraction of agglomerated CNTs on the dynamics of a spinning CNT-reinforced nanocomposite truncated conical shell

Amirabadi,

Afshari,

Sarafraz

et al. 2024

Noise & Vibration Worldwide

Self Cite

View full text Add to dashboard Cite

show abstract

“…It was revealed by them that the larger length and higher embracing and semi-vertex angles result in the smaller natural frequencies. To complete these works, they hired particle swarm optimization to find the best values of mass fractions of the CNTs and fibers and orientation of the fibers to minimize the cost and maximize the fundamental frequency of the three-phase CNT/polymer/fiber laminated truncated conical panels 6 . Aris and Ahmadi 7 studied the analysis of the nonlinear resonance of FGM (functionally graded materials) truncated conical shells exposed to an external harmonic excitation and thermal loading.…”

Section: Introductionmentioning

confidence: 99%

The vibration study of a sandwich conical shell with a saturated FGP core

Esfahani

Hashemian

Aghadavoudi

2022

Sci Rep

View full text Add to dashboard Cite

This paper is provided to analyze the free vibration of a sandwich truncated conical shell with a saturated functionally graded porous (FGP) core and two same homogenous isotropic face sheets. The mechanical behavior of the saturated FGP is assumed based on Biot’s theory, the shell is modeled via the first-order shear deformation theory (FSDT), and the governing equations and boundary conditions are derived utilizing Hamilton’s principle. Three different porosity distribution patterns are studied including one homogenous uniform distribution pattern and two non-homogenous symmetric ones. The porosity parameters in mentioned distribution patterns are regulated to make them the same in the shell’s mass. The equations of motion are solved exactly in the circumferential direction via proper sinusoidal and cosinusoidal functions, and a numerical solution is provided in the meridional direction utilizing the differential quadrature method (DQM). The precision of the model is approved and the influences of several parameters such as circumferential wave number, the thickness of the FGP core, porosity parameter, porosity distribution pattern, the compressibility of the pore fluid, and boundary conditions on the shell’s natural frequencies are investigated. It is shown that the highest natural frequencies usually can be achieved when the larger pores are located close to the shell’s middle surface and in each vibrational mode, there is a special value of the porosity parameter which leads to the lowest natural frequencies. It is deduced that in most cases, natural frequencies decrease by increasing the thickness of the FGP core. In addition, reducing the compressibility of the porefluid a small growth in the natural frequencies can be seen.

show abstract

“…However, there are few research articles describing the FPF behavior of CNT reinforced laminated structures. The following literature review mentions some selected works to brief readers on the structural analysis and recent development of CNT-reinforced laminated composite structures in general in the papers presented by Kassa et al 19 Yousefi et al 20 and Bacciocchi. 21 Kassa et al 19 performed a bending analysis of CNT/polymer/fiber laminated tapered spherical shells and demonstrated the influence of adding CNTs on deflection characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…21 Kassa et al 19 performed a bending analysis of CNT/polymer/fiber laminated tapered spherical shells and demonstrated the influence of adding CNTs on deflection characteristics. Yousefi et al 20 investigated the free vibration response of CNT/polymer/fiber laminated truncated conical structures and highlighted the best values of weight fractions of CNTs to achieve the maximum value of the fundamental frequency of the panel along with minimum cost using optimization technique. Bacciocchi 21 performed a buckling analysis of functionally graded CNT/polymer/fiber laminated composite flat panels subjected to uni-axial and bi-axial loadings and found that the buckling force is highly dependent on the fiber volume fraction.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation of first ply failure response of multi-walled carbon nanotubes/epoxy/glass fiber hybrid laminated tapered curved composite panels

Kassa

Singh

Arumugam

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

In this study, first ply failure (FPF) analysis of multi-walled carbon nanotubes (MWCNTs)/epoxy/glass fiber laminated curved composite panels with various taper configuration under transverse uniform pressure load distributed over the panel surface has been performed. In this regard, various failure criterion were considered, including Hoffman, Tsai–Wu, Tsai–Hill, and maximum stress, to investigate the numerical FPF load using finite element (FE) formulation with displacement fields derived from high order shear deformation theory (HSDT) with displacement field having seven degrees of freedom. The effectiveness of the proposed formulation was validated by comparing the numerically predicted FPF load with experimentally obtained FPF load using a universal testing machine from displacement/strain measurement. Finally, the effects of aspect ratio, different weight fraction of MWCNTs, taper configuration, curved geometry, and aspect ratio on the FPF load of the laminated tapered composite panels are studied. The numerical and experimental studies of the first ply failure behavior have demonstrated that the use of MWCNTs ensures a significant improvement in the FPF load of the analyzed laminated tapered curved composite panels. The taper configuration 3 (TC-3) with hyperbolic curved geometry exhibited the highest resistance to failure than taper configuration 1 (TC-1) and taper configuration 2 (TC-2). Moreover, the aforementioned parameters significantly influence the FPF load of laminated curved panels with various taper configurations. Furthermore, this study can be effectively used as a benchmark problem for researchers and as a tool to design practical laminated tapered curved composite panels with sufficient accuracy.

show abstract

Optimization of CNT/polymer/fiber laminated truncated conical panels for maximum fundamental frequency and minimum cost

Cited by 29 publications

References 55 publications

Effects of non-uniformity in thickness and volume fraction of agglomerated CNTs on the dynamics of a spinning CNT-reinforced nanocomposite truncated conical shell

Effects of non-uniformity in thickness and volume fraction of agglomerated CNTs on the dynamics of a spinning CNT-reinforced nanocomposite truncated conical shell

The vibration study of a sandwich conical shell with a saturated FGP core

Numerical and experimental investigation of first ply failure response of multi-walled carbon nanotubes/epoxy/glass fiber hybrid laminated tapered curved composite panels

Contact Info

Product

Resources

About