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A static compressive strength model for damaged composite laminates


Reference:

Rhead, A. and Butler, R., 2008. A static compressive strength model for damaged composite laminates. In: 13th European Conference on Composite Materials, 2009-06-02 - 2009-06-05, Stockholm.

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    Abstract

    An analytical model for the prediction of compressive strength of composite structures with barely visible impact damage (BVID) is presented. The model represents the complex damage morphology using one of two simple methods based on circular approximations of the damage area and determines a critical interface for propagation of BVID. The finite strip program VICONOPT is used to calculate the strain at which thin-film buckling of the circular delaminated region occurs. The threshold strain is defined as the strain at which the strain energy release rate for the fracture of post-buckled delaminated plies along the delamination is equal to the critical Mode I value ( C G1 ) for the resin. Results obtained using the model are compared with experimental values for static strength of a variety of coupons and stiffened panels reported in the literature. For impacts on the skin under a stiffener the model is accurate to within 5% of the reported experimental result.

    Details

    Item Type Conference or Workshop Items (Paper)
    CreatorsRhead, A.and Butler, R.
    DepartmentsFaculty of Engineering & Design > Mechanical Engineering
    Research CentresAerospace Engineering Research Centre
    RefereedYes
    StatusPublished
    ID Code15178

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