Modeling A: Meshing method
=================================

In this modeling, the MAILLAGE method of the PROPA_FISS operator is used for crack propagation.


Characteristics of the mesh
----------------------------

The structure is modelled by 7551 TRIA3. The crack is not meshed.


.. image:: images/1000000000000690000003EAA6ED1D434BC5C594.png
    :width: 5.2799in
    :height: 2.4764in


.. _RefImage_1000000000000690000003EAA6ED1D434BC5C594.png:

Figure 2.1-1: Structure mesh

The mesh size in the refined area is approximately 0.05mm.


Tested sizes and results
------------------------------

We test the value of the stress intensity factors :math:`{K}_{I}` and :math:`{K}_{\mathit{II}}` after the last propagation step, given by CALC_G. The integration rings are R_ INF = 0.1 mm and R_ SUP = 0.2 mm.


.. csv-table::

    "**Identification**", "**Reference type**", "**Reference value**", "**Tolerance**"
    ":math:`{K}_{I}` ", "'NON_REGRESSION'", "1.142045"," 0.01%"
    ":math:`{K}_{\mathit{II}}` ", "'NON_REGRESSION'", "0.000000"," 0.01%"



.. _RefNumPara__20300_1002211838:


Additional results
-------------------------

The crack paths are compared between those from :ref:`[1] <RefNumPara__20520_1002211838>` and the one obtained by *Code_Aster*.

Note: the coordinate system center is not the same between :ref:`[1] <RefNumPara__20520_1002211838>` and the center of the calculation. To find the coordinate system defined in :ref:`[1] <RefNumPara__20520_1002211838>`, it is necessary to translate a vector (-10; -4) of the results of *Code_Aster*. For reasons of clarity, the crack paths are represented in the same coordinate system on the.


.. image:: images/10000000000001F00000031CB035F0A9F03F4BF7.tif
    :width: 2.6846in
    :height: 4.311in


.. _RefImage_10000000000001F00000031CB035F0A9F03F4BF7.tif:

Figure 2.3-1: Comparison of crack paths

.. image:: images/10000201000009AF00000DB49A8EF8C2BA862F8A.png
    :width: 2.5693in
    :height: 4.1492in


.. _refImage_10000201000009 AF00000DB49A8EF8C2BA862F8A .png: