3. Operands

RAFF_GP is a macro command and therefore calls other Code_Aster commands internally. Most of the keywords are passed on as they are to the other commands. We will then indicate in which command (s) the keywords are used.

3.1. Operand MAILLAGE_N

♦ MAILLAGE_N = my_n, [sd_mesh]

Refers to the initial mesh on which the refinement will take place. It must have a fairly finely represented notch (at least 5 elements on the outline of the half-notch) and the elements that compose it must not be distorted (since refinement decreases the quality of the mesh, it is important that the initial mesh be as clean as possible).

Used by MACR_ADAP_MAIL.

3.2. Operand TRANCHE_2D

♦ TRANCHE_2D =_F (

♦ TAILLE = \({l}_{C}\) [R]

♦ CENTRE = center [R, R, R]

♦ RAYON = \(R\) [R]

♦ ANGLE = \(\theta\) [R]

♦ NB_ZONE = n [I]

)

Refers to all the geometric parameters necessary to define the geometric refinement zone. The syntax is the same as that used by the CALC_GP operator.

Figure shows the parameters for defining these zones; it represents a notch with center \({C}_{\mathrm{ent}}\), radius \(R\); the third zone \({C}_{3}(l)\) of length \(3\ast {l}_{C}\) is shaded.

Figure 4.2-a : Definition of the geometric refinement zone.

3.2.1. Keyword TAILLE

♦ TAILLE = \({l}_{C}\) [R]

Increment in the size of the zones. The zone is therefore of size n* \({l}_{C}\).

Used by FORMULE.

3.2.2. Keyword CENTRE

♦ CENTRE = center [R, R, R]

Indicate the coordinates of the center of notch \({C}_{\mathrm{ent}}\) in the global coordinate system.

Used by FORMULE.

3.2.3. Keyword RAYON

♦ RAYON = \(R\) [R]

Refers to the radius of the notch.

Used by FORMULE.

3.2.4. Keyword ANGLE

♦ ANGLE = \(\theta\) [R]

Refers to the angle formed between the direction of the notch and the \(\overrightarrow{X}\) axis of the global coordinate system.

The angle should be given in degrees and measured trigonometrically.

Used by FORMULE,

3.2.5. Keyword NB_ZONE

♦ NB_ZONE = n [I]

Refers to the number of zones (chips) considered.

3.3. Operand NB_RAFF

◊ NB_RAFF = number [R]

Refers to the number of refinements made from the initial mesh.

By default, this number is 4.

Used by MACR_ADAP_MAIL.