B modeling
==============


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

There are 3 crowns defined for order CALC_G (with :math:`h=\mathrm{0,625}\mathit{mm}`):


.. csv-table::

    "Crown 1:", ":math:`\mathit{Rinf}=2h` "," :math:`\text{Rsup}=5h`"
    "Crown 2:", ":math:`\mathit{Rinf}=h` "," :math:`\text{Rsup}=3h`"
    "Crown 3:", ":math:`\mathit{Rinf}=3h` "," :math:`\text{Rsup}=6h`"


The crack bottom is defined by DEFI_FOND_FISS, and for each crown we perform: a classical :math:`G` calculation (option G of CALC_G).


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

Number of knots: 2679

Number of meshes and types: 644 TRIA6 meshes and 424 QUAD8 meshes


Test values and B modeling results
---------------------------------

The values tested are those of :math:`G` obtained by the classical method and those of :math:`{G}_{\mathrm{IRWIN}}` obtained by the formula d'IRWIN from the stress intensity coefficients:


.. csv-table::

    "**Identification**", "**Reference** :math:`(J\mathrm{.}{m}^{-2})` ", "**Tolerance**"
    "Crown 1 :math:`G` ", "572.05"," 2.00%"
    "Crown 2 :math:`G` ", "572.05"," 2.00%"
    "Crown 3 :math:`G` ", "572.05"," 2.00%"