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Version
7.4
Titrate:
Operator DEFI_COMPOR


Date:
19/01/05
Author (S):
J.M. PROIX, T. KANIT Key
:
U4.43.06-A Page
: 1/6

Organization (S): EDF-R & D/AMA

Handbook of Utilization
U4.4- booklet: Modeling
Document: U4.43.06

Operator DEFI_COMPOR

1 Goal
To define the behavior of a monocrystal or a polycrystal, while allowing the user to choose them
components of the single-crystal law of behavior. One gives, according to this definition, only it
name of the crystallographic structure, knowing that directions of the systems of slip of
each family of systems of slip are defined once for all in the source.
behavior is defined in an external way with STAT_NON_LINE.

The structure of produced data contains names of systems of slip, associated names
material parameters, for each behavior of monocrystal. Names of the systems of
slip refer to internal objects with the code specifying for each one the orientations of
slip surfaces.
Handbook of Utilization
Booklet U4.4- Modeling
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_COMPOR


Date:
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Author (S):
J.M. PROIX, T. KANIT Key
:
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2 Syntax

Comp1 [compor] = DEFI_COMPOR (

/MONOCRISTAL
=
(
_F (

MATER=
mat1,
[to subdue]


ECOULEMENT =/“ECRO_VISC1”
/“ECOU_VISC2”
/“ECOU_VISC3”


ECRO_ISOT=/
“ECRO_ISOT1”
/
“ECRO_ISOT2”


ECRO_CINE=/
“ECRO_CINE1”


“ECRO_CINE2”


ELAS=

/“ELAS”
“ELAS_ORTH”
FAMI_SYST_GLIS =/“BASAL”,
/“PRISMATIQUE”,
/“OCTAEDRIQUE”,
/“PYRAMIDAL1”,
/“PYRAMIDAL2”,
/“CUBIQUE1”,
/“CUBIQUE2”,
/“MACLAGE”,
/“JOINT_GRAIN”
/“RL”,
/“UNIAXIAL”
)
/
POLYCRISTAL
=
(
_F (

MONOCRISTAL

=
comp1,
[compor]



FRAC_VOL

=
fvol, [R]



ANGL_REP

=
(has, B, c)
[l_R]
)

LOCALIZATION =


/“BZ”,
/“BETA”,










DLL
=
DLL,
[R]










DA
=
da,
[R]
)







Handbook of Utilization
Booklet U4.4- Modeling
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_COMPOR


Date:
19/01/05
Author (S):
J.M. PROIX, T. KANIT Key
:
U4.43.06-A Page
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3 Operands

3.1 Word
key
MONOCRISTAL

An occurrence of the key word factor MONOCRISTAL makes it possible to define a law of behavior
elastoviscoplastic single-crystal. This is to be repeated once as many as one has laws of
behavior single-crystal different [R5.03.11].

3.1.1 Operand
MATER

The name of the SD material defines used for the monocrystal. This operand makes it possible to check that
parameters associated with the behaviors chosen under key words ECOULEMENT,
ECRO_ISOT, ECRO_CINE and ELAS exist well in material.

3.1.2 Operand
ECOULEMENT

The viscoplastic type of flow used in the definition of the law of behavior defines
MONOCRISTAL. This is to be chosen among: ECOU_VISC1, ECOU_VISC2, ECOU_VISC3.

3.1.3 Operand
ECRO_ISOT

The isotropic type of work hardening used in the definition of the law of behavior defines
MONOCRISTAL. This is to be chosen among: ECRO_ISOT1 or ECRO_ISOT2.

3.1.4 Operand
ECRO_CINE

The kinematic type of work hardening used in the definition of the law of behavior defines
MONOCRISTAL. This is to be chosen among: ECRO_CINE1 or ECRO_CINE2.

3.1.5 Operand
ELAS

The type of the elastic behavior used in the definition of the law of behavior defines
MONOCRISTAL. This is to be chosen among: ELAS or ELAS_ORTH.

3.1.6 Operand
FAMI_SYST_GLIS

The surname of the systems of slip defines on which one defined the law of
behavior MONOCRISTAL. Orientations of the normals in the slip surfaces and of
directions of slip are calculated automatically by the code starting from the name of
family.
This one is to be chosen among: BASAL, PRISMATIC, OCTAHEDRAL, PYRAMIDAL1, PYRAMIDAL2,
CUBIQUE1, CUBIQUE2, STIRRING, JOINT_GRAIN, RL.

3.2 Word
key
POLYCRISTAL

An occurrence of the key word factor POLYCRISTAL makes it possible to define a phase of the behavior
polycrystalline, starting from the data of a single-crystal behavior, voluminal fraction of
this phase, and of the orientation of this phase. This is to be repeated once as many as one has
different single-crystal phases. Moreover, one rule of localization, commune to all them
phases, is defined by key word LOCALIZATION [R5.03.11].

3.2.1 Operand
MONOCRISTAL

The name of the SD compor defining defines the monocrystal.
Handbook of Utilization
Booklet U4.4- Modeling
HT-66/05/004/A

Code_Aster ®
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Titrate:
Operator DEFI_COMPOR


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3.2.2 Operand
FRAC_VOL

The voluminal fraction of the phase in progress defines. The sum of the whole of the values of fvol
must be equal to 1.

3.2.3 Operand
ANGL_REP

Defines the 3 nautical angles (provided in degrees) which make it possible to direct the monocrystal
corresponding to the phase defined by the current occurrence of POLYCRISTAL. For more
specified on the nautical angles, to consult the documentation of AFFE_CARA_ELEM [U4.42.01].

3.3 Key word
LOCALIZATION

The name of the rule of localization used for the polycrystal defines.

3.3.1 Operands
DLL and DA

If the rule of localization is “BETA”, two real parameters should be provided: DLL and
da.
Handbook of Utilization
Booklet U4.4- Modeling
HT-66/05/004/A

Code_Aster ®
Version
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Titrate:
Operator DEFI_COMPOR


Date:
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3.4 Examples

The following example corresponds to a traditional use of MONOCRISTAL. It results from the test
SSNV171B:

ACIER=DEFI_MATERIAU (ELAS=_F (E=145200.0,
NU=0.3,),
ECOU_VISC2=_F (N=10.0,
K=40.0,
C=1.0,
D=36.68,
A=10.0,),
ECRO_ISOT2=_F (R_0=75.5,
Q1=9.77,
B1=19.34,
H=0.5,
Q2=-33.27,
B2=5.345,),
ECRO_CINE1=_F (D=36.68,),);

COMPORT=DEFI_COMPOR (MONOCRISTAL= (_F (MATER=ACIER,
ECOULEMENT=' ECOU_VISC2',
ECRO_ISOT=' ECRO_ISOT2',
ECRO_CINE=' ECRO_CINE1',
ELAS=' ELAS',
FAMI_SYST_GLIS=' OCTAEDRIQUE',),),);

The following example, implementing POLYCRISTAL, results from test SSNV125:

MATPOLY=DEFI_MATERIAU (ELAS=_F (E=192500.0,
NU=0.3,),
ECOU_VISC2=_F (N=10.0,
K=40.0,
C=6333.0,
D=36.68,
A=72.21,),
ECRO_ISOT2=_F (R_0=75.5,
Q1=9.77,
B1=19.34,
H=2.54,
Q2=-33.27,
B2=5.345,),
ECRO_CINE1=_F (D=36.68,),);

MONO1=DEFI_COMPOR (MONOCRISTAL=_F (MATER=MATPOLY,
ECOULEMENT=' ECOU_VISC2',
ECRO_ISOT=' ECRO_ISOT2',
ECRO_CINE=' ECRO_CINE1',
ELAS=' ELAS',
FAMI_SYST_GLIS=' OCTAEDRIQUE',),);

POLY1=DEFI_COMPOR (POLYCRISTAL= (_F (MONOCRISTAL=MONO1,
FRAC_VOL=0.025,
ANGL_REP= (- 149.676, 15.61819, 154.676,),),
_F (MONOCRISTAL=MONO1,
FRAC_VOL=0.025,
ANGL_REP= (- 481.729, 35.46958, 188.729,),),),
LOCALIZATION=' BETA',
DL=321.5,
DA=0.216,);
Handbook of Utilization
Booklet U4.4- Modeling
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_COMPOR


Date:
19/01/05
Author (S):
J.M. PROIX, T. KANIT Key
:
U4.43.06-A Page
: 6/6

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