.. _R4.10.02:

**r4.10.02** Residual error estimator
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**Summary**

The residual error estimator makes it possible to estimate the discretization error due to the finite element method on the elements of a 2D or 3D mesh. It is an explicit error estimator involving the residuals of equilibrium equations and jumps in normal constraints at interfaces, unlike the Zhu‑Zienkiewicz estimator, which uses a posteriori stress smoothing technique [:ref:`R4.10.01 <R4.10.01>`] and [:ref:`bib5 <bib5>`].

This estimator is implemented in*Code_Aster* in 2D and 3D elasto-plasticity.


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    self

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

    Introduction
    Formulation_de_l_estimateur_en_r_sidu
    Propri_t_s_de_l_estimateur_en_r_sidu
    Implantation_dans_Aster
    Bibliographie
    Description_des_versions_du_document