Benchmark solution
=====================

The reference solution is obtained by solving the problem numerically using the STAT_NON_LINE command. The constraint field and the internal variables field are thus obtained.

The load increment is discretized in 2 moments between 0 and 1.

An elastic prediction is made, and the tangent matrix is re-updated at each iteration and at each increment.

The convergence table is shown below:


.. image:: images/10000000000002060000013AAE995E09F214D429.png
    :width: 5.0752in
    :height: 3.2043in


.. _RefImage_10000000000002060000013AAE995E09F214D429.png:

Figure 2-1: Reference convergence table