STP1059

    Mechanics of Instability-Related Delamination Growth

    Published: Jan 1990


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    Abstract

    Local buckling of a delaminated group of plies can lead to high interlaminar stresses and delamination growth. The mechanics of instability-related delamination growth (IRDG) had been described previously for the through-width delamination. This paper uses the results of finite-element analyses to gain insight into the mechanics of IRDG for the embedded delamination subjected to either uniaxial or axisymmetric loads. This insight is used to explain the dramatic differences in strain energy release rates observed for the through-width delamination, the axisymmetrically loaded embedded delamination, and the uniaxially loaded embedded delamination.

    Keywords:

    composite materials, delamination, compression, buckling, strain energy release rate


    Author Information:

    Whitcomb, JD
    Research engineer, National Aeronautics and Space Administration, Langley Research Center, Hampton, VA


    Paper ID: STP24113S

    Committee/Subcommittee: D30.06

    DOI: 10.1520/STP24113S


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