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  1. Laser Induced Fluorescence (LIF) Nondestructive Evaluation of Incipient Heat Damage in Polymer Matrix Composites, A2476 - DATA SUPPLEMENT [Download]

    Title: Laser Induced Fluorescence (LIF) Nondestructive Evaluation of Incipient Heat Damage in Polymer Matrix Composites, A2476 - DATA SUPPLEMENT
    Depositor: Robert K Olendorf
    Creator:
    • Daniel W. Merdes
    • Christopher M. Bowie
    • Clark A. Moose
    Description: 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 carbon-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. This is the data set supporting the associated report.
    Keywords: polymer, epoxy, flourescence spectrum, materials science
    Date Uploaded: 2017-05-15
  2. Laser Induced Fluorescence (LIF) Nondestructive Evaluation of Incipient Heat Damage in Polymer Matrix Composites, A2476 [Download]

    Title: Laser Induced Fluorescence (LIF) Nondestructive Evaluation of Incipient Heat Damage in Polymer Matrix Composites, A2476
    Depositor: Robert K Olendorf
    Creator:
    • Daniel W. Merdes
    • Christopher M. Bowie
    • Clark A. Moose
    Description: 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 carbon-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 in the associates zip file.
    Keywords: polymer, epoxy, flourescence spectrum, materials science
    Date Uploaded: 2017-05-15