
164 Engineering of Polymers and Chemical Complexity
S
se
=
(29)
Another important concept is the strain–concentration and stress–concentration
stress) and the corresponding average of the composites.
A
f
ee
= (30)
B
f
s
=
(31)
Using the above concepts and equations, the average composite stiffness can be
mffm
(32)
HALPIN–TSAI MODEL
The Halpin–Tsai model is a well-known composite theory to predict the stiffness of
unidirectional composites as a functional of aspect ratio. In ...