Page 206 - Mechanics Analysis Composite Materials

Chapter 4. Mechanics qf a composite layer 191
and the angle of rotation of the element as a solid in the 12-plane

where
x
Wl = 4' - 4, 02 = -+ 4 - (4' + *I
2
are the angles of rotation of axes 1' and 2' (see Fig. 4.60). Thus,

(4.136)

Consider some arbitrary element ds, shown in Fig. 4.61 and introduce its strain

(4.137)

ty

Fig. 4.60. Ply element before and after deformation.

Y

dx

Fig. 4.61. Linear element before and after deformation.