Guided wavefield curvature imaging of invisible damage in composite structures

Ganggang Sha, Hao Xu, Maciej Radzieński, Maosen Cao, Wiesław Ostachowicz, Zhongqing Su

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)


Guided wavefields in composite structures carry a wealth of information about wavefield anomalies from damage–wave interactions. Although such anomalies can be used for damage detection, they are easily masked by incident waves from actuators and reflected waves from structural boundaries. This research presents a concept of guided wavefield curvature for the detection of structural damage. Wavefield curvature analysis is able to highlight the amplitudes of local anomalies in the wavefield signals associated with damage. A wavefield curvature imaging algorithm is developed for visualizing invisible damage in composite structures. The algorithm is first verified by detecting delamination in a carbon fiber reinforced polymer (CFRP) plate and then applied for detection of debonding in a honeycomb sandwich panel. In the experiments, wavefields are generated by a PZT transducer and are then registered by a scanning laser Doppler vibrometer. The experimental results accord well with the actual locations, sizes, and shapes of the delamination and debonding, confirming the effectiveness of the proposed algorithm for the detection of invisible damage in composite structures.

Original languageEnglish
Article number107240
JournalMechanical Systems and Signal Processing
Publication statusPublished - Mar 2021


  • CFRP plate
  • Damage imaging
  • Debonding
  • Delamination
  • Guided wavefield curvature
  • Honeycomb sandwich panel

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Signal Processing
  • Civil and Structural Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Computer Science Applications


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