5. Operands specific to the MAILLAGE method

5.1. Operands MAIL_STRUC

♦ MAIL_STRUC = mast, [mesh]

This operand makes it possible to define the mesh of the healthy structure (i.e. without cracks).

5.2. Operand ITERATION

♦ ITERATION = iter, [I]

This operand allows you to define the iteration number of the propagation calculation. The first iteration (propagation of the initial crack) is iteration 1.

This operand facilitates the carrying out of calculations: it is thus possible to restart a propagation calculation on a crack that has already been propagated nb_init times.

5.3. Operand MAIL_TOTAL

♦ MAIL_TOTAL = CO ('matot2'), [TXM]

This operand makes it possible to define the name of the total mesh, i.e. the concatenation of the mesh of the healthy structure (cf. operand MAIL_STRUC) and of the mesh of the propagated crack MAIL_PROPAGE.

It is this total matot2 mesh that should be used to define the model and the new crack in DEFI_FISS_XFEM.

5.4. Keyword factor FISSURE

This mandatory operand makes it possible to indicate which cracks in the mo model are propagating.

5.4.1. Syntax FISSURE

♦ FISSURE = _F ( ♦ MAIL_ACTUEL = max1 [mesh] ♦ FISS_ACTUELLE = FISS1 [fiss_xfem] ◊ MAIL_PROPAGE = CO (“max2”), [TXM] ◊ GROUP_MA_FOND =/”FOND” [DEFAUT] /grmaff [TXM] ◊ GROUP_MA_FISS =/”FISS” [DEFAUT] /grmafi, [TXM] ♦ TABLE = sif, [table]

5.4.2. Operand MAIL_ACTUEL

♦ MAIL_ACTUEL = max1, [mesh]

This operand makes it possible to define the crack that one wants to propagate using its max1 surface mesh. The max1 crack mesh must respect certain naming rules, see § 5.

5.4.3. Operands FISS_ACTUELLE, TABLE

See paragraphs § 4.7.2 and § 4.7.4.

5.4.4. Operand MAIL_PROPAGE

◊ GROUP_MA_FOND =/”FOND” [DEFAUT]

/grmaff [TXM]

◊ GROUP_MA_FISS =/”FISS” [DEFAUT]

/grmafi, [TXM]

These operands make it possible to indicate what the groups of cells at the bottom and lips will be called (which will be successively \(\text{FOND\_0}\), \(\text{FOND\_1}\), etc.). These keywords are essential to be able to use any mesh for the initial crack; and to be able to treat the case of multi-cracking. A value by default exists.

5.4.5. Operands GROUP_MA_FOND and GROUPE_MA_FISS

◊ MAIL_PROPAGE = CO ('max2'), [TXM]

This operand allows you to define the name of the surface mesh corresponding to the propagated crack.