Improved Active Tagging Non-Destructive Evaluation Techniques for Full-Scale Structural Composite Elements

Abstract

An on-site particle tagging non-destructive evaluation (NDE) technique has been developed for health monitoring of a full-scale structural element of glass-fiber reinforced plastics (GFRP) composites in which conventional NDE approaches are not very effective. Unlike conventional passive tagging NDE inspection, the technique uses an electromagnet exciter to interrogate tagged composites. A laser Doppler vibrometer is used for high-speed and non-contact surface vibration detection. An accept-reject criteria based on the signature pattern difference of a healthy and a damaged structure is then applied to extract an index of the health of the structural elements. The experimental results of the active particle tagging inspection shows a variation in the dynamic response of the specimens when defects and/or damage are presents. The variation could be used to diagnose and to monitor the integrity of materials.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1997
Accession Number
ADA526271

Entities

People

  • Craig A. Rogers
  • Justin Berman
  • Robert Quattrone
  • Victor Giurgiutiu
  • Zao Chen

Organizations

  • University of South Carolina

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Composite Materials
  • Detection
  • Detectors
  • Electromagnetic Fields
  • Engineering
  • Frequency
  • Frequency Response
  • Laser Doppler Vibrometers
  • Materials
  • Measuring Instruments
  • Mechanical Engineering
  • Resonant Frequency
  • Signal Processing
  • South Carolina
  • Test And Evaluation
  • Vibration
  • Vibrometers

Readers

  • Aerosol Science/Aerosol Physics
  • Molecular Genetics
  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • Directed Energy