STP907: Delamination Arrester—An Adhesive Inner Layer in Laminated Composites

    Chan, WS
    Senior engineering specialist, Research Group, Bell Helicopter Textron Inc., Fort Worth, TX

    Pages: 21    Published: Jan 1986


    Abstract

    Delamination arrestment in laminated composites has been achieved by using tough adhesive strips embedded in the interior of the laminate. For (± 302/903/∓302)T and (±35/0/90)s laminates, edge delamination was arrested under both static and fatigue tension loadings. For the (±302/903/∓302)T laminates, delamination was delayed and fatigue life was significantly increased. These results are attributed to the G1 component of the total strain-energy release rate decreasing as delamination approaches the adhesive strip region. It is suggested that the initiation of delamination for both static and fatigue loadings is mainly due to the highest G1 component in the laminate, not the total G. A characterization of fatigue behavior is discussed. It was found that delamination growth rate decreases as the number of fatigue cycles increases.

    Keywords:

    adhesive strip, composite materials, crack arrester, damage tolerance, delamination, fatigue, graphite/epoxy, strain-energy release rate


    Paper ID: STP19986S

    Committee/Subcommittee: D30.04

    DOI: 10.1520/STP19986S


    CrossRef ASTM International is a member of CrossRef.