Localization of a delamination and estimation of its length in a composite laminate beam by the VSHM and pattern recognition methods

Giangiacomo Minak, Roberto Palazzetti, Irina Trendafilova, Andrea Zucchelli

Research output: Contribution to journalConference Contribution

21 Citations (Scopus)
66 Downloads (Pure)

Abstract

The focus of this work is to investigate the delamination damage in laminate composite beams, to fix a Vibration-based Structural Health Monitoring (VSHM) method for the laminate structures. The analysis is concentrated on the vibration characteristics of the samples and, in particular, the attention is addressed on the first several natural frequencies of a composite laminate beam with a delamination damage. The core of this work is an experimental investigation on the vibration response of a composite laminate beam and its changes caused by delaminations with different sizes and in different locations of the beam. The study is divided in 3 sections: delamination detection, delamination localization, and delamination estimate. The aim is to determine how the first six harmonics frequencies change due to the delamination, and the results show that they can be successfully used to investigate the presence, the location and the dimensions of the delamination in a composite beam. A Pattern Recognition analysis is used to locate the damage, while the detection and the evaluation are done using the changes in the harmonic frequencies. A finite element analysis is performed, and the variations of the natural frequencies due to delamination are in good agreement with the experimental results.
Original languageEnglish
Pages (from-to)387-394
Number of pages8
JournalMechanics of Composite Materials
Volume46
Issue number4
DOIs
Publication statusPublished - Nov 2010
Event14th European Conference on Composite Materials, ECCM14 - Budapest, Hungary
Duration: 7 Jun 201010 Jun 2010

Keywords

  • vibration-based damage detection
  • composite beam
  • delamination detection
  • numerical analysis
  • localization
  • delamination
  • estimation
  • length
  • composite laminate beam
  • VSHM
  • pattern recognition methods

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