Page 367 - Engineered Interfaces in Fiber Reinforced Composites

348 Engineered interfaces in fiber reinforced composites

Adh

Adhesive pocket
-.

Edge

Fig. 8.16. Schematic drawings of different configurations of interleaving strips and the edge cap. After
Chan et al. (1986) Chan and Ochoa (1989) and Kim (1983).

interfacial debonding and fiber pull-out which cannot be expected to occur in an
interlayer made only with an adhesive. The use of thermoplastic polymers (Carlsson
and Aksoy, 199 l), polyurethane and CTBN-modified epoxy resin as interleaving
layers is also shown to be quite beneficial for improving the mode I1 interlaminar
fracture toughness (Chen and Jang, 1991). The effectiveness of the interleaving
technique has also been demonstrated under cyclic fatigue loading (Chan, 1986) and
hygrotherrnal aging conditions (Evans and Masters, 1987; lshai et al., 1988).