Assessment of delamination in composite beams using shear horizontal (SH) wave mode

Zhongqing Su, Chunhui Yang, Nan Pan, Lin Ye, Li Min Zhou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

63 Citations (Scopus)


Interaction of Lamb waves with structural damage can lead to wave mode conversion. In this study, the shear horizontal (SH) wave, from the mode conversion of the fundamental symmetric Lamb wave (S0), was used for quantitative identification of delamination in composite beams, based on advanced signal processing using an inverse approach. SH wave propagation under various delamination conditions in CF/EP beams made of orthotropic plain woven fabrics was simulated, and signal characteristics were extracted in terms of the concept of digital damage fingerprints (DDF). With the aid of an artificial neural algorithm, the relation between the DDF of delamination-scattered SH mode and damage parameters was calibrated, whereby the occurrence, location and size of delamination in the composite beams were assessed. The approach was experimentally validated, and the results demonstrate the effectiveness of SH mode for quantitative damage evaluation of composite structures.
Original languageEnglish
Pages (from-to)244-251
Number of pages8
JournalComposites Science and Technology
Issue number2
Publication statusPublished - 1 Feb 2007


  • Artificial neural network
  • Composite laminate
  • Damage identification
  • Delamination
  • Lamb wave

ASJC Scopus subject areas

  • Ceramics and Composites
  • Engineering(all)


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