Damage and permeability evolution in CFRP cross-ply laminates

Hisashi Kumazawa, Hirotaka Hayashi, Ippei Susuki, Takao Utsunomiya

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


In this study, damage and permeability in CFRP cross-ply laminates were evaluated experimentally with using cruciform specimens at room temperature. Development of matrix cracks in the CFRP laminate under biaxial loadings and permeability of helium gas through the laminate were acquired. In this acquirement, the permeability was measured in relation to crack density and applied biaxial loads. The results of the experiments indicate that stacking sequences of CFRP laminate influence not only matrix crack development but also leakage prevention. Gas permeability through damaged CFRP composite laminates is influenced mainly by crack densities and crack opening displacements, because matrix cracks play a role as leakage path. Permeability through the damaged laminates increases in accordance with damage development, and increasing rate of permeability in connection with the strains is approximately dominated by the external biaxial loads.

Original languageEnglish
Pages (from-to)73-81
Number of pages9
JournalComposite Structures
Issue number1-2
Publication statusPublished - 2006 Oct


  • Biaxial load
  • CFRP laminate
  • Cruciform specimen
  • Matrix crack
  • Propellant leak

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering


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