Delamination detection in composite laminates using a vibration-based chaotic oscillator method

Xuan Li, Dunant Halim, Xiaoling Liu, Chris Rudd

Research output: Contribution to conferencePaperpeer-review

4 Citations (Scopus)

Abstract

The work is aimed to study the effectiveness of delamination detection in composite laminates using a vibration-based method that incorporates a chaotic oscillator. Delamination is a typical damage that can occur in composite laminates, which can severely degrade their material properties. However, the traditional vibration-based methods generally have certain limitations in detecting these delamination-type damages particularly when the measured signal is corrupted by noise. With this consideration, a vibration-based method using a non-linear chaotic oscillator is proposed due to its sensitivity to the change in the associated vibration signal’s characteristics. A numerical model of composite laminate with delamination damage under harmonic excitation is developed and the vibration signal obtained from the composite laminate is processed using the proposed vibration-based chaotic oscillator method. The relationship between the Lyapunov Exponent (LE) feature and the length of delamination is investigated. It is found that there is a strong correlation between the size of delamination and the LE feature. The results show the feasibility of using this proposed method to identify the delamination in composite laminates.

Original languageEnglish
Publication statusPublished - 2018
Event47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018 - Chicago, United States
Duration: 26 Aug 201829 Aug 2018

Conference

Conference47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018
Country/TerritoryUnited States
CityChicago
Period26/08/1829/08/18

Keywords

  • Chaotic oscillator
  • Delamination
  • Lyapunov Exponent (LE)
  • Vibration-based method

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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