The influence of disbond defects on Lamb wave testing in GLARE composites

Qiaojian Huang*, Brad Regez, Sridhar Krishnaswamy

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

In this paper, the influence of disbonds on Lamb wave propagation in GLARE composites is described. Guided Lamb waves were launched and detected with Polyvinylidene Fluoride (PVDF) comb transducers. Disbond defects were introduced with ball drop test to study their influence on the Lamb wave signals. The amplitudes of the detected Lamb wave signals show distinct differences with and without disbonds, which can be used to monitor the disbond growth. In addition, a thermal imaging technique was applied to inspect the disbond region so as to cross-correlate the disbond size with its influence on the Lamb wave signals measured by the PVDF sensors. It is demonstrated that the amplitudes of the Ao mode Lamb wave decrease exponentially with increasing disbond size.

Original languageEnglish (US)
Title of host publicationHealth Monitoring of Structural and Biological Systems 2010
EditionPART 1
DOIs
StatePublished - Jun 18 2010
EventHealth Monitoring of Structural and Biological Systems 2010 - San Diego, CA, United States
Duration: Mar 8 2010Mar 11 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
NumberPART 1
Volume7650
ISSN (Print)0277-786X

Other

OtherHealth Monitoring of Structural and Biological Systems 2010
CountryUnited States
CitySan Diego, CA
Period3/8/103/11/10

Keywords

  • Ball drop test
  • Disbond defect
  • Lamb waves
  • PVDF transducer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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