A 24-ply composite double cantilever-beam specimen under mode I (opening) loading has been analyzed by a 3D FEM code that calculated along a straight delamination starter for several different specimen materials. An isotropic specimen was found to have a strain-energy release rate distribution which varied along its delamination front due to the boundary-layer effect and another effect associated with the anticlastic curvature of the bent specimen arms. A 0-deg graphite-reinforced epoxy specimen had a nearly-uniform strain-energy release rate distribution which dropped only near the edge, due to the boundary-layer effect, and a +/- 45-deg graphite/epoxy specimen exhibited a pronounced strain-energy release rate variation across the specimen width.


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    Title :

    Strain energy release rate distributions for double cantilever beam specimens


    Contributors:

    Published in:

    Publication date :

    1991-10-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    Strain energy release rate distributions for double cantilever beam specimens

    CREWS, J. H. / SHAKUMAR, K. N. / RAJU, I. S. | AIAA | 1991


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