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Flaw Investigation in a Multi-Layer, Multimaterial Composite: Using Air-Coupled Ultrasonics

[+] Author Affiliations
Richard A. Livings, Vinay Dayal, Dan J. Barnard, Dave K. Hsu

Iowa State University, Ames, IA

Paper No. PVP2011-57656, pp. 267-276; 10 pages
doi:10.1115/PVP2011-57656
From:
  • ASME 2011 Pressure Vessels and Piping Conference
  • Volume 5: High-Pressure Technology; Nondestructive Evaluation; Nuclear Engineering
  • Baltimore, Maryland, USA, July 17–21, 2011
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4455-7
  • Copyright © 2011 by ASME

abstract

Ceramic tiles are the main ingredient of a multi-layer multi-material composite being considered for the modernization of tank armors. The high stiffness, low attenuation, and precise dimensions of these uniform tiles make them remarkable resonators when driven to vibrate. Defects in the tile, during manufacturing or after usage, are expected to change the resonance modes. The comparison of a pristine tile/lay-up and a defective tile/lay-up will thus be a quantitative damage metric. This study is aimed at examining the vibration modes of the tiles and the composite lay-up and using these vibrations to detect and characterize defects.

Copyright © 2011 by ASME

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