Page 202 - Engineered Interfaces in Fiber Reinforced Composites

I84 Engineered interfaces in fiber reinforced composites

1.5 1.5
(a) (b)

2 1.0 f 1.0
N N
0 0
s z
E E
b0.5 b0.5
L u.

1.5 -
1.5-
(c) (d)

N 2 1.0 2 1.0
= N
0
0
z
E OJ
U
‘00.5 80.5
U LL
I I I

This means that it is necessary to have a high degree of preferred orientation of
hexagonal planes along the fiber axis if a high modulus is desired. To improve the
orientation of graphite crystals, various kinds of thermal and stretching treatments,

:2 A

..

Fig. 5.10. Schematic drawing of graphite lattice structure. After Singer (1989).