Steel and Composite Structures

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Elastic properties of CNT- and graphene-reinforced nanocomposites using RVE

  • Kumar, Dinesh (Mechanical Engineering Department, Malaviya National Institute of Technology) ;
  • Srivastava, Ashish (Mechanical Engineering Department, Malaviya National Institute of Technology)
  • Received : 2015.05.25
  • Accepted : 2016.07.25
  • Published : 2016.08.10
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Abstract

The present paper is aimed to evaluate and compare the effective elastic properties of CNT- and graphene-based nanocomposites using 3-D nanoscale representative volume element (RVE) based on continuum mechanics using finite element method (FEM). Different periodic displacement boundary conditions are applied to the FEM model of the RVE to evaluate various elastic constants. The effects of the matrix material, the volume fraction and the length of reinforcements on the elastic properties are also studied. Results predicted are validated with the analytical and/or semiempirical results and the available results in the literature. Although all elastic stiffness properties of CNT- and graphene-based nanocomposites are found to be improved compared to the matrix material, but out-of-plane and in-plane stiffness properties are better improved in CNT- and graphene-based nanocomposites, respectively. It is also concluded that long nanofillers (graphene as well as CNT) are more effective in increasing the normal elastic moduli of the resulting nanocomposites as compared to the short length, but the values of shear moduli, except $G_{23}$ of CNT nanocomposite, of nanocomposites are slightly improved in the case of short length nanofillers (i.e., CNT and graphene).

Keywords

Acknowledgement

Supported by : Material Research Centre (MRC), Malaviya National Institute of Technology (MNIT)

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