Operator DEFI

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

1/6

Instruction manual

Booklet U4.4- Modeling

HT-66/05/004/A

Organization (S):

EDF-R & D/AMA

Instruction manual
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.

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

2/6

Instruction manual

Booklet U4.4- Modeling

HT-66/05/004/A

2 Syntax

Comp1 [compor] = DEFI_COMPOR (

/MONOCRYSTAL

(

_F (

MATER=

mat1,

[to subdue]

FLOW =/“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”,

/“PRISMATIC”,
/“OCTAHEDRAL”,
/“PYRAMIDAL1”,
/“PYRAMIDAL2”,
/“CUBIQUE1”,
/“CUBIQUE2”,
/“STIRRING”,
/“JOINT_GRAIN”
/“RL”,
/“UNIAXIAL”

)

POLYCRYSTAL

(

_F (

MONOCRYSTAL

comp1,

[compor]

FRAC_VOL

fvol, [R]

ANGL_REP

(has, B, c)

[l_R]

)

LOCALIZATION =

/“BZ”,
/“BETA”,

DLL

DLL,

[R]

da,

[R]

)

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

3/6

Instruction manual

Booklet U4.4- Modeling

HT-66/05/004/A

3 Operands

3.1 Word

key

MONOCRYSTAL

An occurrence of the key word factor MONOCRYSTAL 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 the key words FLOW,
ECRO_ISOT, ECRO_CINE and ELAS exist well in material.

3.1.2 Operand

FLOW

The viscoplastic type of flow used in the definition of the law of behavior defines

MONOCRYSTAL

. 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

MONOCRYSTAL

. This is to be chosen among:

ECRO_ISOT1

ECRO_ISOT2

3.1.4 Operand

ECRO_CINE

The kinematic type of work hardening used in the definition of the law of behavior defines

MONOCRYSTAL

. This is to be chosen among:

ECRO_CINE1

ECRO_CINE2

3.1.5 Operand

ELAS

The type of the elastic behavior used in the definition of the law of behavior defines

MONOCRYSTAL

. This is to be chosen among:

ELAS

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 MONOCRYSTAL. 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.
The aforementioned is to be chosen among:

BASAL

PRISMATIC

OCTAHEDRAL

PYRAMIDAL1

PYRAMIDAL2

CUBIQUE1

CUBIQUE2

STIRRING

JOINT_GRAIN

3.2 Word

key

POLYCRYSTAL

An occurrence of the key word factor POLYCRYSTAL 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 the key word LOCALIZATION [R5.03.11].

3.2.1 Operand

MONOCRYSTAL

The name of the SD compor defining defines the monocrystal.

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

4/6

Instruction manual

Booklet U4.4- Modeling

HT-66/05/004/A

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 POLYCRYSTAL. 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.

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

5/6

Instruction manual

Booklet U4.4- Modeling

HT-66/05/004/A

3.4 Examples

The following example corresponds to a conventional use of MONOCRYSTAL. 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 POLYCRYSTAL, 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,);