Consider a $2-$layer lamination with all layers at $+-45$ degrees

and both layers have the same hardness Q as below

Let's assume you have the matrix: $[Q]=\left[\begin{array}{ccc}130& 2\mathrm{.}5& 0\\ 2\mathrm{.}5& 10& 0\\ 0& 0& 3\mathrm{.}5\end{array}\right]($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.