Laser Induced Fluorescence (LIF) Nondestructive Evaluation of Incipient Heat Damage in Polymer Matrix Composites, A2476

Abstract

Fluorescence spectra were measured against four sets of polymer matrix composite (PMC) specimens that had been heated under controlled conditions of time and temperature at the Naval Air Systems Command (NAVAIR). Each set consisted of specimens of a different fiber-reinforced PMC material: AS4/3501 6 5HS; AS4/3501 6 Uni-Tape; IM7/5250 4 Uni-Tape; and IM7/977 3 Uni-Tape. A chemometric model was developed to correlate changes in spectral features with changes in strength, which NAVAIR had measured according to the short-beam shear (SBS) standard after performing the heat treatments. That model is shown to be able to predict whether a given specimen had been degraded to below 80% of original strength based on its fluorescence spectrum. All steps of the chemometric model are fully described, and the complete data are provided on the CD that accompanies the report.

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Document Details

Document Type
Technical Report
Publication Date
Feb 15, 2017
Accession Number
AD1039287

Entities

People

  • Christopher M. Bowie
  • Clark A. Moose
  • Daniel W. Merdes

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Engineered Resilient Systems
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Carbon Fibers
  • Composite Materials
  • Graphitic Materials
  • Laminates
  • Laser Induced Fluorescence
  • Lasers
  • Light Sources
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Testing
  • Polymer Matrix Composites
  • Standards
  • Structural Components
  • Test And Evaluation
  • Test Methods

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Computational Modeling and Simulation
  • Reinforced Composite Materials

Technology Areas

  • Directed Energy