Qualitative equivalence between electrical percolation threshold and effective thermal conductivity in polymer/carbon nanocomposites

Majid Baniassadi, Akbar Ghazavizadeh, Yves Rémond, Said Ahzi, David Ruch, Hamid Garmestani

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this study, a qualitative equivalence between the electrical percolation threshold and the effective thermal conductivity of composites filled with cylindrical nanofillers has been recognized. The two properties are qualitatively compared on a wide range of aspect ratios, from thin nanoplatelets to long nanotubes. Statistical continuum theory of strong-contrast is utilized to estimate the thermal conductivity of this type of heterogeneous medium, while the percolation threshold is simultaneously evaluated using the Monte Carlo simulations. Statistical two-point probability distribution functions are used as microstructure descriptors for implementing the statistical continuum approach. Monte Carlo simulations are carried out for calculating the two-point correlation functions of computer generated microstructures. Finally, the similarities between the effective conductivity properties and percolation threshold are discussed.

Original languageEnglish
Article number010902
JournalJournal of Engineering Materials and Technology, Transactions of the ASME
Volume134
Issue number1
DOIs
Publication statusPublished - 2012
Externally publishedYes

Fingerprint

equivalence
Thermal conductivity
Nanocomposites
nanocomposites
Polymers
thermal conductivity
Carbon
Microstructure
thresholds
carbon
polymers
Probability distributions
Nanotubes
continuums
Distribution functions
Aspect ratio
microstructure
probability distribution functions
aspect ratio
nanotubes

Keywords

  • electrical percolation threshold
  • Monte Carlo simulationintegration
  • strong-contrast homogenization technique
  • thermal conductivity
  • two-pointthree-point correlation functions

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Qualitative equivalence between electrical percolation threshold and effective thermal conductivity in polymer/carbon nanocomposites. / Baniassadi, Majid; Ghazavizadeh, Akbar; Rémond, Yves; Ahzi, Said; Ruch, David; Garmestani, Hamid.

In: Journal of Engineering Materials and Technology, Transactions of the ASME, Vol. 134, No. 1, 010902, 2012.

Research output: Contribution to journalArticle

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AU - Ruch, David

AU - Garmestani, Hamid

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