Evaluating Mechanical Properties of Nanoplatelet Reinforced Composites Under Mechanical and Thermal Loads

Azizi, Sohrab; Fattahi, A. M.; Kahnamouei, Jalal Taheri

doi:10.1166/jctn.2015.4334

Cited by 12 publications

(4 citation statements)

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“…( 8 ) a n d ( 9 ) , w e h a v e : A c = π R 2 0 − r 2 i and A = πR 2 . Equations (10) and (11) are extended Equations of the rules of mixture being used to calculate Young's modulus of nanocomposites with short carbon nanotubes (Fig. 3b).…”

Section: Nanotube Inside the Representative Volume Element (Fig 3b)mentioning

confidence: 99%

“…Lia & Chen developed a solid 3D model for carbon nanotube reinforced composite which completely provided accuracy and compatibility between carbon nanotubes and matrix in the composite [8]. Some researchers have analyzed the mechanical properties of nanocomposites using representative volume element (RVE) and continuum mechanics methods [9][10][11][12]. Various factors affect the efficiency of these nanocomposites and the main factor determining the efficiency of nanotube reinforcement is the mechanism of load transfer from matrix to carbon nanotube.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of elastic modulus in PE/CNT composites subjected to axial loads

Roozpeikar

Fattahi

2018

SN Appl. Sci.

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In this paper, a range of matrix materials from polymer to metal matrix were considered which have extensive applications in various industries. The effective mechanical properties of CNT-based composites were evaluated using a 3-D cylindrical representative volume element (RVE). Continuum mechanics model was used for estimating the effective Young's modulus in the axial direction of the RVE. The load transfer conditions between carbon nanotubes and matrix were modeled using a separated interfacial region. Numerical examples using FEM are presented which demonstrated that load carrying capacities of CNTs in a matrix were significant. With the addition of CNTs into a matrix at volume fractions of only about 2% and 5%, the stiffness of the composite was increase as high as 0.7 and 9.7 times for short and long CNTs, respectively. Also the effect of CNT addition to polyethylene matrix was studied. These simulation was performed using ABAQUS software and the obtained results were consistent with the experimental results reported in the literature.

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Section: Nanotube Inside the Representative Volume Element (Fig 3b)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of elastic modulus in PE/CNT composites subjected to axial loads

Roozpeikar

Fattahi

2018

SN Appl. Sci.

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“…Then, for an isotropic surface, Gurtin and Ian Murdoch [9] proposed a continuum model of surface elasticity in which the Laplace-Young equation extended to solid materials. The model has the capability to incorporate the surface stress effects into the mechanical response of nanostructures which has been applied in many studies conducted for various problems about mechanical behavior of the structures at nanoscale [10][11][12][13][14][15][16][17][18].…”

Section: Advances In Materials Science and Engineeringmentioning

confidence: 99%

Nonlinear Vibrational Analysis of Nanobeams Embedded in an Elastic Medium including Surface Stress Effects

Azizi

Safaei

Fattahi

et al. 2015

Advances in Materials Science and Engineering

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Due to size-dependent behavior of nanostructures, the classical continuum models are not applicable for the analyses at this submicron size. Surface stress effect is one of the most important matters which make the nanoscale structures have different properties compared to the conventional structures due to high surface to volume ratio. In the present study, nonlinear free vibrational characteristics of embedded nanobeams are investigated including surface stress effects. To this end, a thin surface layer is assumed on the upper and lower surfaces of the cross section to separate the surface and bulk of nanobeams with their own different material properties. Based on harmonic balance method, closed-form analytical solution is conducted for nonlinear vibrations to obtain natural frequencies of embedded nanobeams with and without considerations of surface elasticity and residual surface tension effects corresponding to the various values of nondimensional amplitude, elastic foundation modulus, and geometrical variables of the system. Selected numerical results are given to indicate the influence of each one in detail.

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“…Azizi et al [5][6] using carbon nanotubes as reinforcing fibres have been performed to address the exceptional mechanical and electrical properties of nanotubebased composites. Vibration analysis of MLGSs embedded in polymer matrix was investigated by Pradhan and Phadikar [7] using nonlocal continuum mechanics.…”

Section: Introductionmentioning

confidence: 99%