• Title/Summary/Keyword: Stain-Energy Release Rate

Search Result 1, Processing Time 0.013 seconds

Ultimate Strength of Composite Laminates with Free-Edge Delamination (자유단 충간분리를 갖는 복합재 적층판의 최종 파괴강도)

  • 양광영;윤성운;김재열
    • Transactions of the Korean Society of Machine Tool Engineers
    • /
    • v.11 no.2
    • /
    • pp.59-64
    • /
    • 2002
  • This paper presets experimental and analytical studies of ultimate strength of [$[30_2/-30_2/90]_S$ carbon/epoxy laminates with free-edge delamination under uniaxial tension. We performed tensile teat far laminates with Telflon inserted on interfaces to simulate initial free-edge delamination, The experiment reveals that extensional stiffness of the laminate decreases by the initiation of the delamination, and that strength of the laminate without delamination is smaller than that of the laminates with delamination. Generalized quasi-three delamination finite element analysis, which employs energy release rate and maximum stress criteria, predicts the ultimate strength of the laminates with sufficient accuracy.