Hierarchical multiscale modeling of nanotube-reinforced polymer composites

Ghanbari, J ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1615/IntJMultCompEng.v7.i5.20
  3. Publisher: 2009
  4. Abstract:
  5. A finite element-based hierarchical multiscale modeling scheme is presented and used for the analysis of nanotube-reinforced polymer composites. The scheme presented here consists of micro- and macroscale boundary value problems linked together using a computational homogenization scheme. Using the presented hierarchical multiscale scheme, we have studied nanotube-reinforced polymer composites, and the elastic properties are determined. Using different representative volume elements (RVEs) representing different volume fractions of aligned nanotubes, the effect of the nanotube volume fraction and the existence of an interphase layer on the effective elastic modulus of the nanocomposite are studied. The results are compared with the micromechanical Halpin-Tsai equation, molecular dynamics simulations, and other available results. We have studied the stress concentration factor in the RVE, and it is shown that this factor is inversely proportional to the carbon nanotube volume fraction. Also, a nonlinear large deformation analysis has been carried out to study the global behavior of the nanocomposite, and a nonlinear relation between stress and strain has been observed. © 2009 by Begell House, Inc
  6. Keywords:
  7. Aligned nanotubes ; Computational homogenization ; Effective elastic modulus ; Elastic properties ; Finite element ; Global behaviors ; Halpin-tsai equations ; Interphase layer ; Interphase layers ; Large deformation analysis ; Macro scale ; Micro-mechanical ; Molecular dynamics simulations ; Multiscale modeling ; Multiscale modeling schemes ; Multiscale schemes ; Nonlinear behavior ; Nonlinear relations ; Reinforced polymer composites ; Representative volume elements ; Stress concentration factors ; Differential equations ; Mechanical properties ; Molecular dynamics ; Nanocomposites ; Polymers ; Reinforced plastics ; Stress concentration ; Titration ; Volume measurement ; Carbon nanotubes
  8. Source: International Journal for Multiscale Computational Engineering ; Volume 7, Issue 5 , 2009 , Pages 395-408 ; 15431649 (ISSN)
  9. URL: http://www.dl.begellhouse.com/journals/61fd1b191cf7e96f,5d71ecb1241e6f50,2d7591391eed85f9.html