A correlation filtering-based matching pursuit (CF-MP) for damage identification using Lamb waves

Fucai Li, Zhongqing Su, Lin Ye, Guang Meng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

53 Citations (Scopus)

Abstract

Time of flight (ToF) plays a key role in positioning structural damage, but the exact determination of ToF in complicated Lamb wave signals is somewhat challenging. A signal processing approach, taking advantage of correlation filtering-based matching pursuit (CF-MP), was developed. In this approach, correlation among wave signals captured from the same structure under different damage statuses was calibrated, which served as an indicator for the occurrence and severity of structural damage. The ToF of a damage-scattered Lamb wave was pinpointed with high precision. With it, the approach was then applied to Lamb wave signals acquired from delaminated carbon-fibre/epoxy (CF/EP) composite beams, and the location and size of the delamination were exactly predicted. Experimental validation indicated that such an approach is able to filter boundary-reflected signal components involved in a complex wave signal, making the wave-based damage identification technique practical for small structures.
Original languageEnglish
Article number010
Pages (from-to)1585-1594
Number of pages10
JournalSmart Materials and Structures
Volume15
Issue number6
DOIs
Publication statusPublished - 1 Dec 2006
Externally publishedYes

ASJC Scopus subject areas

  • Signal Processing
  • Atomic and Molecular Physics, and Optics
  • Civil and Structural Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

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