Multiscale Models of Multifunctional Composites for On-Board Damage Detection and Failure Prevention

Abstract

Analytic and numerical models were developed to predict the dependence of electrical resistance on internal fiber damage in carbon-fiber-reinforced polymer (CFRP) composites, so as to make electrical resistance measurement a tool for damage detection and prognosis in CFRP components. The models show that electrical resistance is more sensitive to damage than elastic modulus, that resistance change can be used to detect inadvertent overloads, that the remaining fatigue life after overload cycles can be accurately determined, and that the statistical distribution of electrical resistance changes is narrow enough to permit accurate assessment of the damage state of the material. Macroscopic models of components with damage in the form of holes or delaminations were also developed and their predictions correlated with experimental measurements.

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Document Details

Document Type
Technical Report
Publication Date
Oct 08, 2008
Accession Number
ADA500339

Entities

People

  • W. A. Curtin

Organizations

  • Brown University

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Carbon Fiber Reinforced Polymer
  • Carbon Fibers
  • Carbon Nanotubes
  • Composite Materials
  • Damage Detection
  • Detection
  • Electrical Resistance
  • Fiber Reinforced Composites
  • Fiber Reinforced Polymers
  • Materials
  • Materials Science
  • Materials Testing
  • Modulus Of Elasticity
  • Molecular Dynamics
  • Reliability
  • Tensile Strength
  • Three Dimensional

Readers

  • Electrical Engineering
  • Structural Health Monitoring of Composite Structures.