The effect of nanotube waviness and agglomeration on the elastic property of carbon nanotube-reinforced composites

Dong Li Shi*, Xi Qiao Feng, Yonggang Y. Huang, Keh Chih Hwang, Huajian Gao

*Corresponding author for this work

Research output: Contribution to journalArticle

440 Citations (Scopus)

Abstract

Owing to their superior mechanical and physical properties, carbon nanotubes seem to hold a great promise as an ideal reinforcing material for composites of high-strength and low-density. In most of the experimental results up to date, however, only modest improvements in the strength and stiffness have been achieved by incorporating carbon nanotubes in polymers. In the present paper, the stiffening effect of carbon nanotubes is quantitatively investigated by micromechanics methods. Especially, the effects of the extensively observed waviness and agglomeration of carbon nanotubes are examined theoretically. The Mori-Tanaka effective-field method is first employed to calculate the effective elastic moduli of composites with aligned or randomly oriented straight nanotubes. Then, a novel micromechanics model is developed to consider the waviness or curviness effect of nanotubes, which are assumed to have a helical shape. Finally, the influence of nanotube agglomeration on the effective stiffness is analyzed. Analytical expressions are derived for the effective elastic stiffness of carbon nanotube-reinforced composites with the effects of waviness and agglomeration. It is found that these two mechanisms may reduce the stiffening effect of nanotubes significantly. The present study not only provides the relationship between the effective properties and the morphology of carbon nanotube-reinforced composites, but also may be useful for improving and tailoring the mechanical properties of nanotube composites.

Original languageEnglish (US)
Pages (from-to)250-257
Number of pages8
JournalJournal of Engineering Materials and Technology, Transactions of the ASME
Volume126
Issue number3
DOIs
StatePublished - Jul 1 2004

Fingerprint

Carbon Nanotubes
agglomeration
Nanotubes
Carbon nanotubes
nanotubes
Agglomeration
elastic properties
carbon nanotubes
composite materials
Composite materials
stiffness
micromechanics
stiffening
Micromechanics
Stiffness
reinforcing materials
mechanical properties
Mechanical properties
high strength
modulus of elasticity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Materials Science(all)

Cite this

@article{66c990e0be514c968b108f0227a7d0ff,
title = "The effect of nanotube waviness and agglomeration on the elastic property of carbon nanotube-reinforced composites",
abstract = "Owing to their superior mechanical and physical properties, carbon nanotubes seem to hold a great promise as an ideal reinforcing material for composites of high-strength and low-density. In most of the experimental results up to date, however, only modest improvements in the strength and stiffness have been achieved by incorporating carbon nanotubes in polymers. In the present paper, the stiffening effect of carbon nanotubes is quantitatively investigated by micromechanics methods. Especially, the effects of the extensively observed waviness and agglomeration of carbon nanotubes are examined theoretically. The Mori-Tanaka effective-field method is first employed to calculate the effective elastic moduli of composites with aligned or randomly oriented straight nanotubes. Then, a novel micromechanics model is developed to consider the waviness or curviness effect of nanotubes, which are assumed to have a helical shape. Finally, the influence of nanotube agglomeration on the effective stiffness is analyzed. Analytical expressions are derived for the effective elastic stiffness of carbon nanotube-reinforced composites with the effects of waviness and agglomeration. It is found that these two mechanisms may reduce the stiffening effect of nanotubes significantly. The present study not only provides the relationship between the effective properties and the morphology of carbon nanotube-reinforced composites, but also may be useful for improving and tailoring the mechanical properties of nanotube composites.",
author = "Shi, {Dong Li} and Feng, {Xi Qiao} and Huang, {Yonggang Y.} and Hwang, {Keh Chih} and Huajian Gao",
year = "2004",
month = "7",
day = "1",
doi = "10.1115/1.1751182",
language = "English (US)",
volume = "126",
pages = "250--257",
journal = "Journal of Engineering Materials and Technology, Transactions of the ASME",
issn = "0094-4289",
publisher = "American Society of Mechanical Engineers(ASME)",
number = "3",

}

The effect of nanotube waviness and agglomeration on the elastic property of carbon nanotube-reinforced composites. / Shi, Dong Li; Feng, Xi Qiao; Huang, Yonggang Y.; Hwang, Keh Chih; Gao, Huajian.

In: Journal of Engineering Materials and Technology, Transactions of the ASME, Vol. 126, No. 3, 01.07.2004, p. 250-257.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The effect of nanotube waviness and agglomeration on the elastic property of carbon nanotube-reinforced composites

AU - Shi, Dong Li

AU - Feng, Xi Qiao

AU - Huang, Yonggang Y.

AU - Hwang, Keh Chih

AU - Gao, Huajian

PY - 2004/7/1

Y1 - 2004/7/1

N2 - Owing to their superior mechanical and physical properties, carbon nanotubes seem to hold a great promise as an ideal reinforcing material for composites of high-strength and low-density. In most of the experimental results up to date, however, only modest improvements in the strength and stiffness have been achieved by incorporating carbon nanotubes in polymers. In the present paper, the stiffening effect of carbon nanotubes is quantitatively investigated by micromechanics methods. Especially, the effects of the extensively observed waviness and agglomeration of carbon nanotubes are examined theoretically. The Mori-Tanaka effective-field method is first employed to calculate the effective elastic moduli of composites with aligned or randomly oriented straight nanotubes. Then, a novel micromechanics model is developed to consider the waviness or curviness effect of nanotubes, which are assumed to have a helical shape. Finally, the influence of nanotube agglomeration on the effective stiffness is analyzed. Analytical expressions are derived for the effective elastic stiffness of carbon nanotube-reinforced composites with the effects of waviness and agglomeration. It is found that these two mechanisms may reduce the stiffening effect of nanotubes significantly. The present study not only provides the relationship between the effective properties and the morphology of carbon nanotube-reinforced composites, but also may be useful for improving and tailoring the mechanical properties of nanotube composites.

AB - Owing to their superior mechanical and physical properties, carbon nanotubes seem to hold a great promise as an ideal reinforcing material for composites of high-strength and low-density. In most of the experimental results up to date, however, only modest improvements in the strength and stiffness have been achieved by incorporating carbon nanotubes in polymers. In the present paper, the stiffening effect of carbon nanotubes is quantitatively investigated by micromechanics methods. Especially, the effects of the extensively observed waviness and agglomeration of carbon nanotubes are examined theoretically. The Mori-Tanaka effective-field method is first employed to calculate the effective elastic moduli of composites with aligned or randomly oriented straight nanotubes. Then, a novel micromechanics model is developed to consider the waviness or curviness effect of nanotubes, which are assumed to have a helical shape. Finally, the influence of nanotube agglomeration on the effective stiffness is analyzed. Analytical expressions are derived for the effective elastic stiffness of carbon nanotube-reinforced composites with the effects of waviness and agglomeration. It is found that these two mechanisms may reduce the stiffening effect of nanotubes significantly. The present study not only provides the relationship between the effective properties and the morphology of carbon nanotube-reinforced composites, but also may be useful for improving and tailoring the mechanical properties of nanotube composites.

UR - http://www.scopus.com/inward/record.url?scp=7544220578&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=7544220578&partnerID=8YFLogxK

U2 - 10.1115/1.1751182

DO - 10.1115/1.1751182

M3 - Article

VL - 126

SP - 250

EP - 257

JO - Journal of Engineering Materials and Technology, Transactions of the ASME

JF - Journal of Engineering Materials and Technology, Transactions of the ASME

SN - 0094-4289

IS - 3

ER -