4. Summary of results

The results concerning the movements and the constraints are very close to the analytical solution with the modeling adopted (\(\text{< 0.2\%}\) for the movements, \(\text{< 0.5\%}\) for the constraints).

The fact that there is only one constraint component (\({\sigma }_{\mathrm{zz}}\)) in the problem makes it possible to test only 2 elastic coefficients (\({E}_{N}\) and \({\nu }_{\text{LN}}\)).

Although these coefficients are constant, they were introduced as functions to test functionality ELAS_ISTR_FO.

The elastic coefficients in the plane \(\mathrm{XY}\) and the direction \(Z\) were chosen so as to obtain the same values of the displacements at the points \(B\), \(C\), \(D\) and \(E\) as those calculated for an isotropic (test SSLV07) or orthotropic (test SSLV120) material. Numerically, these values are very close to those of these tests at the points considered (of the order of \({10}^{-6}\)), the difference resulting from the mode of construction of the stiffness matrices in the various cases. At point \(X\), these values differ but correspond well to the reference solution.