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Constitutive Modeling Of Nanotube-Reinforced Polymer Composites (2002)
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| Venue: | Composites, AIAA 2002-1427. 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference |
| Citations: | 37 - 2 self |
BibTeX
@INPROCEEDINGS{Odegard02constitutivemodeling,
author = {G. M. Odegard and T.S. Gates and K. E. Wise},
title = {Constitutive Modeling Of Nanotube-Reinforced Polymer Composites},
booktitle = {Composites, AIAA 2002-1427. 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference},
year = {2002},
pages = {1671--1687}
}
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Abstract
In this study, a technique is presented for developing constitutive models for polymer composite systems reinforced with single-walled carbon nanotubes (SWNT). Because the polymer molecules are on the same size scale as the nanotubes, the interaction at the polymer/nanotube interface is highly dependent on the local molecular structure and bonding. At these small length scales, the lattice structures of the nanotube and polymer chains cannot be considered continuous, and the bulk mechanical properties can no longer be determined through traditional micromechanical approaches that are formulated by using continuum mechanics. It is proposed herein that the nanotube, the local polymer near the nanotube, and the nanotube/polymer interface can be modeled as an effective continuum fiber using an equivalentcontinuum modeling method. The effective fiber serves as a means for incorporating micromechanical analyses for the prediction of bulk mechanical properties of SWNT/polymer composites with various nanotube shapes, sizes, concentrations, and orientations. As an example, the proposed approach is used for the constitutive modeling of two SWNT/LaRC-SI (with a PmPV interface) composite systems, one with aligned SWNTs and the other with three-dimensionally randomly oriented SWNTs. The Young's modulus and shear modulus have been calculated for the two systems for various nanotube lengths and volume fractions.
Keyphrases
constitutive modeling nanotube-reinforced polymer composite bulk mechanical property shear modulus local polymer continuum mechanic micromechanical analysis swnt larc-si various nanotube shape aligned swnts three-dimensionally randomly small length scale composite system nanotube polymer interface various nanotube length local molecular structure single-walled carbon nanotube polymer nanotube interface constitutive model lattice structure traditional micromechanical approach polymer chain polymer molecule pmpv interface size scale polymer composite system volume fraction effective fiber serf effective continuum fiber swnt polymer composite
