2. Benchmark solution

2.1. Calculation method used for the reference solution

3D Code_Aster calculation performed with an element HEXA8 whose all nodes have an imposed displacement of zero according to \(\mathrm{Oz}\). This makes it possible to constitute a reference for the case of plane deformations (in plane \((\mathrm{Ox},\mathrm{Oy})\)), where an analytical solution or the results of other calculation codes are not available.

The functioning of Lemaître’s nonlinear viscoelasticity in \(\mathrm{3D}\) was itself validated using the SSNP05A test.

2.2. Benchmark results

\({\varepsilon }_{{\nu }_{\mathrm{xx}}}\) and \({\varepsilon }_{{\nu }_{\mathrm{xy}}}\) at times \(t=30s\), \(t=3630s\), \(t=3660s\), and \(t=3720s\)

2.3. Uncertainty about the solution

Uncertainty less than \(\text{0.5\%}\)