Modeling A: mesh crack
=================================

In this modeling, the crack is meshed, and the standard finite element method is used.

to perform the calculation.


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

The structure is modelled by a cracked mesh composed of 13874 tetrahedra (see [:ref:`Figure 2.1-a <Figure 2.1-a>`]).


.. image:: images/10000000000003CC00000295514F384C49221FAA.png
    :width: 4.6047in
    :height: 3.1425in


.. _RefImage_10000000000003CC00000295514F384C49221FAA.png:

**Figure 2.1-a: Cracked mesh**


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

The values of :math:`K1` are tested on the first three nodes of the crack bottom. Indeed, the orientation of the crack implies that :math:`K1` cannot be calculated on certain nodes. We test the nodes concerned to verify that Code_Aster assigns them the value of the nearest neighbor node or the calculation of :math:`K1` could be performed.


.. csv-table::

    "Identification", "Reference Type", "Reference Value"
    "Node 1", "'NON_REGRESSION'", "212813.877395"
    "Node 2", "'NON_REGRESSION'", "212813.877395"
    "Node 3", "'NON_REGRESSION'", "212813.877395"


We also test the values of :math:`\mathit{COOR}\text{\_}X`, :math:`\mathit{COOR}\text{\_}Y`, :math:`\mathit{COOR}\text{\_}Z`, :math:`\mathit{TEMP}` and :math:`\mathit{NEUT}1` at node 1 in order to verify that these components are indeed present in the output table for case FEM.