Delamination assessment in structures made of composites based on general signal correlation

Irina Trendafilova, Roberto Palazzetti, Andrea Zucchelli

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

This paper considers a vibration-based damage assessment approach which is based on the general idea for signal cross-correlation. Here the method is demonstrated and validated on a composite laminate beam and it is applied for the purposes of delamination assessment in composite structures. The method uses two measures of cross-correlation between two vibration signals measured in different points on the structure in order to diagnose the delamination. The linear cross-correlation as well as a new measure for nonlinear cross-correlation, the mutual information, are introduced and applied for the purposes of delamination assessment. The delamination assessment is based on the comparison of the measures for the healthy and the damaged state of the structure. In this study the method is applied using the free decay responses of the beam. Two delamination indexes are introduced and they are used for the purposes of delamination detection and localization.
Original languageEnglish
Article number1440022
Number of pages13
JournalInternational Journal of Structural Stability and Dynamics
Volume14
Issue number8
Early online date17 Jul 2014
DOIs
Publication statusPublished - 2014

Keywords

  • vibration based structural health monitoring
  • delamination
  • cross correlation
  • composite laminates
  • delamination assessment
  • composites
  • general signal correlation
  • vibration-based structural health monitoring

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