Potential Super-Toughness Behavior of Chiral (10,5) Carbon Nanotubes

Abstract

Improvements in construction materials have been evolutionary and not revolutionary. We are attempting to change this paradigm by exploiting the extreme properties of carbon nanotubes, and by designing materials at the molecular level using molecular-based predictive rheology. As an initial step, we have modeled pristine and defective (5,5) carbon nanotubes and a defective (10,5) carbon nanotube using Tight-Binding Molecular Dynamics. The (5,5) carbon nanotubes exhibited extraordinary tensile strengths and brittle failures in agreement with the findings of other researchers. Their strengths and Young's moduli were degraded by the molecular flaws. By contrast, the defective (10,5) carbon nanotube exhibited lower, but still extraordinary, tensile strength and post-yield toughness behavior many times greater than toughened 4340 Steel. Such toughness behavior is an important and beneficial material characteristic for construction materials.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2006
Accession Number
ADA481882

Entities

People

  • A. J. Bednar
  • B. C. Barker
  • C. P. Marsh
  • C. R. Welch
  • D. L. Majure
  • David T. Wu
  • R. S. Maier
  • Richard Haskins
  • Robert M. Ebeling
  • T. M. Simeon

Organizations

  • Engineer Research and Development Center

Tags

DTIC Thesaurus Topics

  • Carbon Nanotube Composites
  • Carbon Nanotubes
  • Composite Materials
  • Computer Simulations
  • Construction Materials
  • Engineered Materials
  • Fullerenes
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Molecular Dynamics
  • Stress Strain Relations
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.
  • Nanocomposite Materials Science