Page 224 - 3D Fibre Reinforced Polymer Composites

2-Pinned Composites 213

Amount of Z-Fibres (“YO)

Figure 9.9 Effect of z-pin content on the mode I interlaminar fracture toughness of a
carbodepoxy composite (Data from Freitas et al., 1994)

l2 r 0 0% Z-Fiber??

N-
\ io
E
2

t
T
0 8 m I m I I
100% 80% 60% 40% 20% 0% MODE I
0% 20% 40% 60% 80% lOO%MODEII
Figure 9.10 Effect of mixed modes I and I1 loading on the interlaminar fracture
toughness of z-pinned carbodepoxy composites (Data from Cartit and Partridge,
1999a)