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Creators/Authors contains: "Raghavan, Seetha"

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  1. ; ; ; ; (, SPIE)
    Shull, Peter J; Yu, Tzuyang; Gyekenyesi, Andrew L; Wu, H Felix (Ed.)
    Free, publicly-accessible full text available May 12, 2026
  2. ; ; (, American Institute of Aeronautics and Astronautics)
    Full Text Available 
  3. ; ; ; ; ; (, American Institute of Aeronautics and Astronautics)
    Full Text Available 
  4. ; ; ; ; ; ; ; ; ; (, AIAA SciTech)
    Accepted Manuscript Full Text Available
  5. ; (, American Institute of Aeronautics and Astronautics)
    Full Text Available 
  6. ; ; ; ; ; ; (, American Institute of Aeronautics and Astronautics)
    Full Text Available 
  7. ; ; ; ; ; ; ; (, International Astronautical Federation (IAF))
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  8. ; ; ; ; (, Journal of the European Ceramic Society)
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  9. ; ; ; ; (, Technology & Innovation)
    The future of aerospace structures is highly dependent on the advancement of reliable and high-performance materials, such as composite materials and metals. Innovation in high resolution non-invasive evaluation of these materials is needed for their qualification and monitoring for structural integrity. Aluminum oxide (or α-alumina) nanoparticles present photoluminescent properties that allow stress and damage sensing via photoluminescence piezospectroscopy. This work describes how these nanoparticles are added into a polymer matrix to create functional coatings that monitor the damage of the underlying composite or metallic substrates. Different volume fractions of α-alumina nanoparticles in the piezospectroscopic coatings were studied for determining the sensitivity of the coatings and successful damage detection was demonstrated for an open-hole tension composite substrate as well as 2024 aluminum tensile substrates with a subsurface notch. 
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  10. ; ; ; ; ; (, AIAA Scitech 2019 Forum)
    Full Text Available