Flexural Behavior of Stepped Graphite Epoxy Laminates
Cross-ply tapered/stepped laminates with taper angles of 1 and 2° between the top and bottom surfaces were fabricated using T300/934 graphite/epoxy by compression molding. Ply terminations were done internally within the laminate and externally on the surface of the laminate at various cross-sections in order to obtain the taper. Equivalent cross-ply specimens with internal and external ply terminations, respectively, were tested in three point bending. the tapered laminates with internal ply terminations failed due to a series of delaminations originating at the step corners of the 0° plies. Macroscopically, the specimens with internal ply term nations failed by tensile fracture of the outer plies at relatively higher loads.
P. Gopal et al., "Flexural Behavior of Stepped Graphite Epoxy Laminates," Polymer Composites, Wiley-Blackwell, Jan 1994.
The definitive version is available at http://dx.doi.org/10.1002/pc.750150104
Mechanical and Aerospace Engineering
Article - Journal
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