A Wavefield Imaging Technique for Delamination Detection in Composite Structures

Abstract

In this study, a 1D scanning laser vibrometer and imaging techniques are utilized to detect hidden delamination in multi-layer composites. First, Lamb waves are excited by a surface-mounted piezoelectric wafer transducer and the corresponding out-of-plane velocities are measured by a scanning laser vibrometer. Second, wave field images are constructed from the scanned velocity signals, and the images are processed to highlight the interaction of Lamb waves with delamination. In particular, several image processing techniques such as Laplacian filtering are explored to accentuate the Lamb wave interactions with delamination from incident and reflected waves.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2010
Accession Number
ADA544403

Entities

People

  • D. Dutta
  • E. D. Swenson
  • H. Sohn
  • Jian Yang
  • M. P. Desimio
  • S. E. Olson

Organizations

  • KAIST

Tags

Communities of Interest

  • Air Platforms
  • Biomedical
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Boundaries
  • Composite Materials
  • Composite Structures
  • Data Processing
  • Detection
  • Elastic Waves
  • Excitation
  • Frequency
  • Frequency Bands
  • Frequency Shift
  • Image Processing
  • Structural Health Monitoring
  • Transducers
  • Vibrometers
  • Wave Propagation
  • Waves

Readers

  • Coastal Oceanography
  • Image Processing and Computer Vision.
  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • Directed Energy