Page 368 - Mechanics Analysis Composite Materials

Chapter 7. Environmental, special loading, and manufacturing eflects 353

a X

2

Fig. 7.46. Regular (a), through-the-thickness (b), and local (c) ply waviness.
Then, because the structure is periodic

(7.71)

Approximating the ply wave as
.m
z=asin- ,
1
where a is the amplitude, we get

dz m
tana=-= fcos- ,
dx 1