158
6
The irregular surface in this model is shown by rectangles in
. Fig. 6.1, and when pressure is applied, these rectangular elements
spread along the interface.
? Example 6.4 What should the ratio between w 0 and b 0 be to
achieve the maximum degree of intimate contact?
v Answer
D ic
maximum index of intimate contact
= (
)
1
D
a a
w b
ic = +
0
0
0
1
/
/
a b ab aw
0 0
0
0
=
+
because
a b ab
0 0 =
Therefore,
ab ab aw
=
+
0
0
w b
b b
b b b
0
0
0
0
0
1
/
/
/
= (
)−
= −
(
)
In terms of a,
w b
a a a
0
0
0
/
/
=
−
(
)
Force
b
b 0
a 0
a
W0
At
At
t = 0
t > 0
. Fig. 6.1 Model for intimate contact
Chapter 6 · Processability of Thermoplastic Composites