One layer $0$ degrees. It is a $2-$layer structure with one layer and the other layer at $90$ degrees.Consider laminating and layering both layers as follows assume it has the same stiffness matrix Q:

$($a$).$ Calculate matrices A$,$ B and D for $2-$layer lamination

$($b$).$ The applied load is Nx $=100$ kN$/$m$.$ Lamina stress change in each layer in the lamination

calculate.

$($c$).$ Draw the outline of the deformed laminate.$[Q]=\left[\begin{array}{ccc}{130}^{+}& 2\mathrm{.}5& 0\\ 2\mathrm{.}5& 10& 0\\ 0& 0& 3\mathrm{.}5\end{array}\right]$