Free vibration analysis of three-phase CNT/polymer/fiber laminated tow-steered quadrilateral plates considering agglomeration effects

Fazilati, Jamshid; Khalafi, Vahid; Jalalvand, Meisam

doi:10.1016/j.tws.2022.109638

Cited by 11 publications

(2 citation statements)

References 33 publications

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“…The CNT inclusion is considered as transversely straight with an infinite aspect ratio. In this work, the Eshelby-Mori-Tanaka homogenization scheme (Figure 1) was used to determine the elastic properties of the CNT-reinforced matrix [1,24,25]. For a CNT embedded in the composite, it is related to a local coordinate system (O, x 1 , x 2 , x 3 ), where the x 3 -axis lies along its longitudinal direction and the (x 1 , x 2 ) plane coincides with its transversely isotropic plane.…”

Section: Cnt Inclusionmentioning

confidence: 99%

Mechanical Homogenization of Transversely Isotropic CNT/GNP Reinforced Biocomposite for Wind Turbine Blades: Numerical and Analytical Study

et al. 2023

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One of the biggest problems facing the use of carbon nanotubes in reinforced composites is agglomeration within the matrix phase. This phenomenon—caused by Van der Waals forces—leads to dispersion problems and weakens the properties of the composites. This research presents a multi-stage homogenization approach used to investigate the influence of the aspect ratio, volume fraction, and agglomeration of the nanofillers on the effective mechanical properties of a polymer biocomposite containing randomly dispersed carbon nanotubes and graphene nanoplatelets. The first stage consisted in evaluating the properties of the reinforced polymers by the CNT/GNP. The second step consisted in combining the reinforced polymers with different natural and synthetic unidirectionally oriented fibers. It was found that agglomeration has a huge influence on the mechanical properties of the composite. The novelty of this work consisted of the consideration of the parameters influencing the elastic properties using different micromechanics approaches and numerical techniques.

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Section: Cnt Inclusionmentioning

confidence: 99%

Mechanical Homogenization of Transversely Isotropic CNT/GNP Reinforced Biocomposite for Wind Turbine Blades: Numerical and Analytical Study

et al. 2023

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“…12 Meanwhile, predicting the strain-dependent electrical conductivity of CNT-incorporated nanocomposites is challenging due to the effects of the waviness of the CNTs in the polymer matrix and the electron tunneling phenomenon at the imperfect interface. [14][15][16][17] First, CNTs incorporated in the polymer matrix are often observed to be curved and looped instead of straight due to the viscosity of a polymer matrix used and the high aspect ratio of CNTs. 18,19 As a result, curved CNT may lead to an inhomogeneous distribution within the matrix, decreasing the electrical conductivity of the nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

A multiscale modeling framework for predicting strain‐dependent electrical conductivity of carbon nanotube‐incorporated nanocomposites considering the electron tunneling effect

Kil,

Bae,

Park

et al. 2024

Polymer Composites

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The present work proposes a multiscale modeling framework for predicting the strain‐dependent electrical conductivity of carbon nanotube (CNT)‐incorporated nanocomposites considering the electron tunneling effect. A micromechanical model taking into account the waviness of the CNTs is utilized and molecular dynamics simulations estimating changes in distance between CNTs in the polymer matrix are conducted in an attempt to incorporate the electron tunneling effect. A series of numerical parametric studies are carried out to examine the influence of model parameters (e.g., CNT length, number of CNT segments, and intrinsic interfacial resistivity) on the strain‐dependent electrical conductivity of the nanocomposites. In addition, CNT/polydimethylsiloxane samples are fabricated and their strain‐dependent electrical conductivity is experimentally evaluated. Finally, to verify the predictive capability of the proposed modeling framework, the present predictions are compared with experimental results.Highlights A multiscale modeling framework of CNT‐incorporated nanocomposites is proposed. A micromechanics model and molecular dynamics simulations are used. The study includes a numerical parametric investigation. The present predictions are compared with those obtained experimentally.

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Numerical and experimental frequency analysis of damaged fiber‐reinforced metal laminated composite

Thomas,

Akkasali,

Patle

et al. 2024

Z Angew Math Mech

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This research numerically evaluated the eigenvalue responses of the damaged fiber metal laminate (FML) structure. The current numerical model is delved into including crack‐type damage effect on the structural integrity/ stiffness via frequency response. In this regard, a complete mathematical model of FML has been derived through higher‐order shear deformation kinematics for computational purposes. The mathematical model is converted to computer code in the MATLAB platform to predict the eigenvalue responses of FML components with and without damage. The damage influences are considered via circular meshing of finite element steps associated with the isoparametric element (nine nodes and nine degrees of freedom for each node). The solution consistency is checked via convergence, and the results are compared with data available in the open domain. Further, an experimental test is carried out to improve confidence using an in‐house test rig. The experiment was conducted by varying the length of the FML in 0.1 m increments. The results showed good agreement between the numerical and experimental data, with the lowest deviation being 0.29% and the highest 8.97%. The developed numerical model is extended to analyze the influences of design parameters such as geometry shape, aspect ratio (a/b), thickness ratio (a/h) ratio, curvature ratio, and fiber layup sequence on the natural frequency response.

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Free vibration analysis of three-phase CNT/polymer/fiber laminated tow-steered quadrilateral plates considering agglomeration effects

Cited by 11 publications

References 33 publications

Mechanical Homogenization of Transversely Isotropic CNT/GNP Reinforced Biocomposite for Wind Turbine Blades: Numerical and Analytical Study

Mechanical Homogenization of Transversely Isotropic CNT/GNP Reinforced Biocomposite for Wind Turbine Blades: Numerical and Analytical Study

A multiscale modeling framework for predicting strain‐dependent electrical conductivity of carbon nanotube‐incorporated nanocomposites considering the electron tunneling effect

Numerical and experimental frequency analysis of damaged fiber‐reinforced metal laminated composite

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