Accession Number:

ADA544403

Title:

A Wavefield Imaging Technique for Delamination Detection in Composite Structures

Descriptive Note:

Conference paper

Corporate Author:

KOREA ADVANCED INST OF SCIENCE AND TECHNOLOGY DAEJEON (KOREA)

Report Date:

2010-08-01

Pagination or Media Count:

7.0

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.

Subject Categories:

  • Laminates and Composite Materials
  • Optical Detection and Detectors
  • Miscellaneous Detection and Detectors
  • Fiber Optics and Integrated Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE