Examples
========


With analytical formulas
-----------------------------


.. code-block:: text

    LN = FORMULE (NOM_PARA =( 'X', 'Y', 'Z'), VALE = 'Z-12.5')

    LT = FORMULE (NOM_PARA =( 'X', 'Y', 'Z'), VALE = 'X-10'.)


    FISS = DEFI_FISS_XFEM (MAILLAGE = MAILLAIN,

    DEFI_FISS =_F (FONC_LT = LT,

    FONC_LN = NL,),

    GROUP_MA_ENRI = 'VOL',

    INFO =2,

    )


With mesh groups
---------------------------


.. code-block:: text

    FISS = DEFI_FISS_XFEM (MAILLAGE = MAILLAIN,

    DEFI_FISS =_F (GROUP_MA_FISS = 'LEVSUP',

    GROUP_MA_FOND = 'FONFIS',),

    GROUP_MA_ENRI = 'VOL',

    INFO =3,

    )


With the catalog of predefined shapes
------------------------

Case of a cylindrical crack:


.. code-block:: text

    FISS = DEFI_FISS_XFEM (MAILLAGE = MAILLAIN,

    DEFI_FISS =_F (

    FORM_FISS = 'CYLINDRE',

    DEMI_GRAND_AXE = r,

    DEMI_PETIT_AXE = r,

    CENTRE = (0., l_fiss, 0. ),

    VECT_X = (0., 0., 1. ),

    VECT_Y = (1., 0. ,0. ),

    ),

    GROUP_MA_ENRI =' VOL ',

    INFO =1,

    );

Case of a crack defined by a half-plane:


.. code-block:: text

    FISS = DEFI_FISS_XFEM (MAILLAGE = MAILLAIN,

    INFO =1,

    DEFI_FISS =_F (

    FORM_FISS = 'DEMI_PLAN',

    PFON =( 0., 5. ,15. ),

    NORMALE =( 0., 0., 1. ),

    DTAN =( 0., -1., 0. )),

    GROUP_MA_ENRI =' VOL ');