Quantitative damage detection in cross-ply laminates using Lamb wave method

N. Toyama, J. Noda, Tomonaga Okabe

Research output: Contribution to journalArticlepeer-review

78 Citations (Scopus)


This paper investigates the effects of transverse cracking and delamination on the S 0 mode velocity in GFRP and CFRP cross-ply laminates. We found experimentally that both the stiffness and the velocity decreased as the transverse crack density increased. In contrast, the stiffness decreased but the velocity increased as the delamination length increased. We analytically deduced the relationship between the velocity and the crack density from a combination of a shear-lag analysis and the classical plate theory. We also confirmed that the Lamb wave propagated through the 0° layers in the delaminated regions, and formulized the relationship between the velocity and the delamination length. The predicted crack density and delamination length using the measured velocity were in good agreement with the experimental results. This method is simple and promising for structural health monitoring of composite structures.

Original languageEnglish
Pages (from-to)1473-1479
Number of pages7
JournalComposites Science and Technology
Issue number10
Publication statusPublished - 2003 Jan 1


  • A. Polymer matrix-composites (PMCs)
  • C. Delamination
  • C. Transverse cracking
  • D. Non-destructive testing
  • D. Ultrasonics

ASJC Scopus subject areas

  • Ceramics and Composites
  • Engineering(all)


Dive into the research topics of 'Quantitative damage detection in cross-ply laminates using Lamb wave method'. Together they form a unique fingerprint.

Cite this