1. Reference problem

1.1. Geometry

The 3 layers have the relative thickness: \(H/\mathrm{4,}H/\mathrm{2,}H/4\)

1.2. Material properties

The orthotropy axes correspond to the curvilinear directions \(x\) and \(y\).

\({E}_{l}=25.\)	\({E}_{t}=1.\) (\(l\iff x\); \(t\iff y\))
\({G}_{\text{lt}}={G}_{\text{lz}}=0.5\)	\({G}_{\mathrm{tz}}=0.2\)
\({\nu }_{\text{lt}}=0.25\)

1.3. Boundary conditions and loads

• Boundary conditions: the displacement perpendicular to the plate, on its contour is zero.

• Loading: \(p={p}_{o}\mathrm{sin}(\pi x/L)\mathrm{sin}(\pi y/L)\) with \({p}_{o}=0.01\)

1.4. Initial conditions

Not applicable