Laser Induced Fluorescence (LIF) Nondestructive Evaluation of Incipient Heat Damage in Polymer Matrix Composites, A2476
Technical Report,01 Oct 2011,01 Jul 2016
PENNSYLVANIA STATE UNIV STATE COLLEGE STATE COLLEGE United States
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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 AS43501 6 5HS AS43501 6 Uni-Tape IM75250 4 Uni-Tape and IM7977 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.
- Laminates and Composite Materials
- Test Facilities, Equipment and Methods