Effects of interfacial friction on composites containing nanotube ropes

Xu Zhou, K. W. Wang, Charles E. Bakis

Research output: Contribution to journalConference article

8 Citations (Scopus)

Abstract

The present paper develops a constitutive model for the elastic modulus and energy loss of CNT-based polymeric composites. In this study, a close-packed lattice consisting of seven nanotubes in hexagonal arrangement is used to model single-walled carbon nanotubes often found in rope-like bundles in polymers. The composite is described using a multi-phase system composed of a resin and bonded and debonded nanotube ropes. The concept of "stick-slip" motion caused by frictional contacts is proposed to describe the load transfer behavior among the nanotubes and between the nanotube ropes and resin. A micromechanical model is developed to describe inter-tube and tube/resin frictional motions. Modulus change and energy dissipation due to the "stick-slip" interfacial load transfer are determined. The developed method is used to analyze composites with aligned nanotube ropes. The analytical study shows that mechanical properties can be significantly affected by adding small fractions of carbon nanotubes in polymers. The elastic modulus and loss factor are both strain-dependent. Also, to show the inter-tube sliding effects due to nanotube aggregation, results obtained for the composites filled with well-dispersed nanotubes and nanotube ropes are compared.

Original languageEnglish (US)
Pages (from-to)2989-2999
Number of pages11
JournalCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Volume4
StatePublished - Dec 1 2004

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Nanotubes
Friction
Composite materials
Stick-slip
Resins
Energy dissipation
Polymers
Elastic moduli
Carbon Nanotubes
Single-walled carbon nanotubes (SWCN)
Constitutive models
Carbon nanotubes
Agglomeration
Mechanical properties

All Science Journal Classification (ASJC) codes

  • Architecture
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "The present paper develops a constitutive model for the elastic modulus and energy loss of CNT-based polymeric composites. In this study, a close-packed lattice consisting of seven nanotubes in hexagonal arrangement is used to model single-walled carbon nanotubes often found in rope-like bundles in polymers. The composite is described using a multi-phase system composed of a resin and bonded and debonded nanotube ropes. The concept of {"}stick-slip{"} motion caused by frictional contacts is proposed to describe the load transfer behavior among the nanotubes and between the nanotube ropes and resin. A micromechanical model is developed to describe inter-tube and tube/resin frictional motions. Modulus change and energy dissipation due to the {"}stick-slip{"} interfacial load transfer are determined. The developed method is used to analyze composites with aligned nanotube ropes. The analytical study shows that mechanical properties can be significantly affected by adding small fractions of carbon nanotubes in polymers. The elastic modulus and loss factor are both strain-dependent. Also, to show the inter-tube sliding effects due to nanotube aggregation, results obtained for the composites filled with well-dispersed nanotubes and nanotube ropes are compared.",
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TY - JOUR

T1 - Effects of interfacial friction on composites containing nanotube ropes

AU - Zhou, Xu

AU - Wang, K. W.

AU - Bakis, Charles E.

PY - 2004/12/1

Y1 - 2004/12/1

N2 - The present paper develops a constitutive model for the elastic modulus and energy loss of CNT-based polymeric composites. In this study, a close-packed lattice consisting of seven nanotubes in hexagonal arrangement is used to model single-walled carbon nanotubes often found in rope-like bundles in polymers. The composite is described using a multi-phase system composed of a resin and bonded and debonded nanotube ropes. The concept of "stick-slip" motion caused by frictional contacts is proposed to describe the load transfer behavior among the nanotubes and between the nanotube ropes and resin. A micromechanical model is developed to describe inter-tube and tube/resin frictional motions. Modulus change and energy dissipation due to the "stick-slip" interfacial load transfer are determined. The developed method is used to analyze composites with aligned nanotube ropes. The analytical study shows that mechanical properties can be significantly affected by adding small fractions of carbon nanotubes in polymers. The elastic modulus and loss factor are both strain-dependent. Also, to show the inter-tube sliding effects due to nanotube aggregation, results obtained for the composites filled with well-dispersed nanotubes and nanotube ropes are compared.

AB - The present paper develops a constitutive model for the elastic modulus and energy loss of CNT-based polymeric composites. In this study, a close-packed lattice consisting of seven nanotubes in hexagonal arrangement is used to model single-walled carbon nanotubes often found in rope-like bundles in polymers. The composite is described using a multi-phase system composed of a resin and bonded and debonded nanotube ropes. The concept of "stick-slip" motion caused by frictional contacts is proposed to describe the load transfer behavior among the nanotubes and between the nanotube ropes and resin. A micromechanical model is developed to describe inter-tube and tube/resin frictional motions. Modulus change and energy dissipation due to the "stick-slip" interfacial load transfer are determined. The developed method is used to analyze composites with aligned nanotube ropes. The analytical study shows that mechanical properties can be significantly affected by adding small fractions of carbon nanotubes in polymers. The elastic modulus and loss factor are both strain-dependent. Also, to show the inter-tube sliding effects due to nanotube aggregation, results obtained for the composites filled with well-dispersed nanotubes and nanotube ropes are compared.

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M3 - Conference article

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VL - 4

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JO - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

JF - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

SN - 0273-4508

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