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国际多尺度计算工程期刊
影响因子: 1.016 5年影响因子: 1.194 SJR: 0.554 SNIP: 0.68 CiteScore™: 1.18

ISSN 打印: 1543-1649
ISSN 在线: 1940-4352

国际多尺度计算工程期刊

DOI: 10.1615/IntJMultCompEng.v7.i5.20
pages 395-408

Hierarchical Multiscale Modeling of Nanotube-Reinforced Polymer Composites

J. Ghanbari
Mechanical Engineering Department, Sharif University of Technology, 14588-89694 Tehran, Iran
R. Naghdabad
Mechanical Engineering Department, Sharif University of Technology, 14588-89694 Tehran, Iran

ABSTRACT

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.

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