Buckling and Debond Growth of Partial Debonds in Composite Splice Joints

摘要

The strains at which buckling and debond growth occur in adhesively bonded composite splice joints containing an initial debond were experimentally measured. Buckling and debond growth were found to be dependent on initial debond length, flange stiffness, and layup sequence. Flanges with a larger initial debond length showed lower buckling strains but higher debond initiation strains. Flanges having higher bending stiffness exhibited lower strains on both buckling and debond initiation. Changes in twisting stiffness (D_66) due to different layup sequences resulted in a variation of post-buckled flange out-of-plane deformation shape at debond initiation.