Example 5.2: Cross-ply laminate with three layers
Solution: , and will be the same as in Example 5.1. For this laminate as shown in Figure 5.9(b). The entries of , and are calculated as:
that is,
Now we calculate
That results in .
Note: is a symmetric laminate. Hence, can be directly written without any calculations.
Thus,
Figure 5.9: Example problems (a) Example 5.1 laminate (b) Example 5.2 laminate
Figure 5.10: Example problems (a) Example 5.3 laminate (b) Example 5.4 laminate
, 
and 
will be the same as in Example 5.1. For this laminate 
as shown in Figure 5.9(b). The entries of 
, 
and 
are calculated as:
. 
can be directly written without any calculations. 
laminate (b) Example 5.4 
laminate
