Page 321 - Engineered Interfaces in Fiber Reinforced Composites

302 Engineered interfaces in Fber reinforced composites

$ 0.5-
E
CI
z 0.4-
8
r
m 0.3-
Q)
P 0.2-
e!

2
I Young's modulus ratio, EJE
(a)

L
I1
L
.w I1
.w
9 0.4-
u)
u)
9 0.4-
fiber-coating
S \=\ \=\ fiber-coating
S
8 0.3-
v)
v)
8 0.3-
2 2
s 0.2- +'+ +'+
s 0.2-
.- .- coating-matrix
coating-matrix
K
K
5 0.1
5 0.1 -
c -
E
L
'8 0 +-+ +-+ 1
Fig. 7.12. Maximum interface shear stresses plotted (a) as a function of Young's modulus ratio of coating
to matrix, E&,, for coating thickness t = 50 ptn, and (b) as a function of coating thickness t for Young's
modulus ratio of coating to matrix, Ei/E, = 0.5. After Kim et al. (1994~)

Fig. 7.13. Schematic drawing of a three-cylinder composite model with an infinite matrix radius. After
Kim and Mai (1996).