IMPACT-INDUCED DELAMINATION IN [0(5), 90(5), 0(5)] CARBON-FIBER POLYETHERETHERKETONE COMPOSITE LAMINATES

This paper reports both experimental and numerical investigations on delamination mechanisms in [0(5), 90(5), 0(5)] carbon fiber(CF)/poly(etheretherketone) (PEEK) laminate subjected to low-velocity impact. It was found that the CF/PEEK composite exhibits the same damage mechanisms as epoxy-based composites, but superior delamination resistance. For the crossply laminate, the impact delamination results from a Mode II interlaminar fracture process, and a close association exists between the interlaminar shear stress field and the delamination growth. The prediction of impact-induced delamination sizes is discussed.