.. _V6.03.303:

**v6.03.303** SSNP303 - Element with plane stress and traction - Perfect plasticity
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**Summary:**

This nonlinear quasistatic mechanics test :math:`\mathrm{2D}` consists in loading three superimposed plate elements (element type MECPQU4). The 4 knots are common to the 3 elements. The elements have different properties (perfect plasticity) to obtain a suitable traction curve. This test is taken from guide NAFEMS.

The aim is to compare the various Newton-Raphson methods for solving the system of nonlinear equations (NEWTON: (MATRICE 'ELASTIQUE') and NEWTON: (MATRICE 'TANGENTE') with REAC_INCR and REAC_ITER). The convergence criterion chosen corresponds to :math:`\text{0.01\%}` of the residual force (RESI_GLOB_RELA).

The modeling is carried out with plane elements of type MECPQU4.


.. toctree::
    :hidden:

    self

.. toctree::
    :maxdepth: 2
    :numbered:

    Probl_me_de_r_f_rence
    Solution_de_r_f_rence
    Mod_lisation_A
    Mod_lisation_B
    Mod_lisation_C
    Synth_se_des_r_sultats