C modeling
==============


Characteristics of modeling
-----------------------------------


.. image:: images/1000000000000452000003090448FF0A4989223D.png
    :width: 6.889in
    :height: 4.6717in


.. _RefImage_1000000000000452000003090448FF0A4989223D.png:

Charging differs:


* we remove the constraint imposed in :math:`Y\mathrm{=}h`,


* we impose :math:`p\mathrm{=}–1` pressure on the lips of the crack.


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

Number of knots: 673

Number of meshes and types: 112 QUAD8 meshes and 142 TRIA6 meshes


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

:math:`G` values


.. csv-table::

    "**Identification**", "**Reference**", "**Tolerance**"
    "Crowns 1 to 6 :math:`G` "," :math:`2.3093{10}^{\mathrm{-}3}` "," :math:`\text{<1\%}`"
    "Crowns 1 to 6 :math:`G` (IRWIN)", ":math:`2.3093{10}^{\mathrm{-}3}` "," :math:`\text{<1\%}`"
    "Crowns 1 to 6 :math:`{K}_{1}` "," :math:`22.529` "," :math:`\text{<1\%}`"
    "Crowns 1 to 6 :math:`{K}_{2}` "," :math:`0.` ", "absolute"



note
--------

The calculation of :math:`G`, :math:`{K}_{1}`, :math:`{K}_{2}` and :math:`G` (IRWIN) :math:`\mathrm{=}\frac{1}{E}({K}_{1}^{2}+{K}_{2}^{2})` was performed using the same fields :math:`\theta` as for the previous modeling. The results are the same.