Code_Aster ®
Version
8.2
Titrate:
SSNV171 - Comparaison POLY_CFC and MONOCRISTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX Key
:
V6.04.171-B Page:
1/8
Organization (S): EDF-R & D/AMA
Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
V6.04.171 document
SSNV171 - Comparaison POLY_CFC and
MONOCRISTAL
Summary:
One presents here a test having for reference another model of behavior already validated in Code_Aster,
who is POLY_CFC. The treated geometry is a cube. The goal is to test concept MONOCRISTAL while using
a law of behavior equivalent to POLY_CFC.
Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
Code_Aster ®
Version
8.2
Titrate:
SSNV171 - Comparaison POLY_CFC and MONOCRISTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX Key
:
V6.04.171-B Page:
2/8
1
Problem of reference
1.1 Geometry
P1
P2
P5
P6
P3
P4
Y
P7
P8
X
Z
One defines an element MA1, containing the P1 nodes, P2, P3, P4, P5, P6, P7 and P8.
1.2
Material properties
Young modulus: E = 145200MPa
Poisson's ratio: = 0.3
Modeling a:
A monocrystal of the type POLY_CFC, directed according to
)
0
,
0
,
30
(
with:
D = 0
L
D = 0
With
NR = 10
K = 40
=
5
.
75
0
B = 19.34
1
H = 0
L
Q = 9.77
1
Q = - 33.27
2
B = 5.345
2
C = 0.00001
1
D =
.
36 68
1
C = 0
2
Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
Code_Aster ®
Version
8.2
Titrate:
SSNV171 - Comparaison POLY_CFC and MONOCRISTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX Key
:
V6.04.171-B Page:
3/8
Modeling b:
ECOU_VISC2 with:
TYPE_PARA=' ECOU_VISC'
NR = 10
K = 40
C = 0
D =
68
,
36
To = 10
ECRO_ISOT2 with:
TYPE_PARA=' ECRO_ISOT'
R =
5
.
75
0
B = 19.34
1
B = 5.345
2
Q = 9.77
1
Q = - 33.27
2
H = 0
ECRO_CINE1 with:
TYPE_PARA=' ECRO_CINE'
D = 36.68
The selected orientation is the same one as that of modeling A,
)
0
,
0
,
30
(
.
1.3
Boundary conditions and loadings
·
P4 node
: DX = DY = 0
·
P8 node
: DX = DY = DZ = 0
·
Nodes P2 and P6
: DX = 0
·
Nodes P1, P3, P5 and P7: FX = 35
The loading is increasing FX = 0 with FX = 35, divided into 100 increments.
2
Reference solution
2.1
Method of calculation
One compares the functionality of new concepts with a concept already implemented in
Code_Aster, which is POLY_CFC.
Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
Code_Aster ®
Version
8.2
Titrate:
SSNV171 - Comparaison POLY_CFC and MONOCRISTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX Key
:
V6.04.171-B Page:
4/8
3 Modeling
With
3.1
Characteristics of the grid
A number of nodes: 8.
Modeling 3D: 1 element of quadratic volume: HEXA8.
Clean texture has POLY_CFC, with a family of systems of slip corresponding to the structure
cubic with centered faces, in fact system OCTAEDRIQUE. The structure contains only one
grain, therefore a voluminal fraction equal to 1 and the selected orientation is
)
0
,
0
,
30
(
.
4
Results of modeling A
4.1 Functionalities
tested
Commands Options
DEFI_TEXTURE SYST_GLISSEMENT NR, L
PLAN
ANGL_NAUT,
PROPORTION
DEFI_MATERIAU POLY_CFC
TEXTURE,
DLL, DA, NR, K, TAU_0, B1, HL, Q1, Q2, B2, C1, D1, C2
STAT_NON_LINE COMP_INCR
RELATION=' POLY_CFC'
4.2 Values
tested
Identification Reference
Aster %
difference
of
xx
SIEF_ELGA
- 210 - 210
- 7.38E-05
of
xx
EPSI_ELGA_DEPL
- 0.0018955 - 0.0018955
- 4.30E-04
of
yy
EPSI_ELGA_DEPL
0.000503377
0.000503377 9.11E-05
of
xx
EPSP_ELGA
- 0.000449212
- 0.000449212 5.43E-05
of
yy
EPSP_ELGA
0.0000694943
0.00006949337 - 3.46E-05
Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
Code_Aster ®
Version
8.2
Titrate:
SSNV171 - Comparaison POLY_CFC and MONOCRISTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX Key
:
V6.04.171-B Page:
5/8
5 Modeling
B
5.1
Characteristics of the grid
A number of nodes: 8.
Modeling 3D: 1 element of quadratic volume: HEXA8.
The structure contains only one grain (voluminal fraction equal to 1) and the selected orientation is
)
0
,
0
,
30
(
.
6
Results of modeling B
6.1 Functionalities
tested
Commands Options
DEFI_MATERIAU ELAS
E, NAKED
ECOU_VISC2
TYPE_PARA=' ECOU_VISC',
NR, K, C, D, A
ECRO_ISOT2
TYPE_PARA=' ECRO_ISOT',
R_0, B1, B2, Q1, Q2, H
ECRO_CINE1
TYPE_PARA=' ECRO_CINE',
D
DEFI_COMPOR MATER MONOCRYSTAL,
ECOULEMENT=' ECOU_VISC2',
ECRO_ISOT=' ECRO_ISOT2',
ECRO_CINE=' ECRO_CINE1',
ELAS=' ELAS',
FAMI_SYST_GLIS=' OCTAEDRIQUE'
MODEL AFFE_CARA_ELEM
MASSIF
GROUP_MA=' TOUT',
ANGL_REP
STAT_NON_LINE CARA_ELEM
COMP_INCR
RELATION=' MONOCRISTAL',
COMPOR
6.2 Values
tested
Identification Reference
Aster %
difference
of
xx
SIEF_ELGA
- 210 - 210
- 7.38E-05
of
xx
EPSI_ELGA_DEPL
- 0.00189 - 0.00189
- 4.30E-04
of
yy
EPSI_ELGA_DEPL
0.0005033 0.0005033
9.15E-05
of
xx
EPSP_ELGA
- 0.000449 - 0.000449
5.66E-05
of
yy
EPSP_ELGA
0.0000695 0.0000695
- 3.23E-05
Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
Code_Aster ®
Version
8.2
Titrate:
SSNV171 - Comparaison POLY_CFC and MONOCRISTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX Key
:
V6.04.171-B Page:
6/8
7 Modeling
C
7.1
Characteristics of the grid
A number of nodes: 8.
Modeling 3D: 1 element of quadratic volume: HEXA8.
The structure contains only one grain (voluminal fraction equal to 1) and the selected orientation is
)
0
,
0
,
30
(
.
The goal of this modeling is the comparison between the values of the stress fields and of
deformations obtained with the monocrystal into implicit and explicit as well as the comparison for
two modelings of the values of the variable interns V43 which is the cumulated plastic deformation
total of the monocrystal.
8
Results of modeling C
8.1 Functionalities
tested
Commands Options
DEFI_MATERIAU ELAS
E, NAKED
ECOU_VISC1
TYPE_PARA=' ECOU_VISC',
NR, K, C
ECRO_ISOT1
TYPE_PARA=' ECRO_ISOT',
R_0, B1, B2, Q1, Q2, H
ECRO_CINE1
TYPE_PARA=' ECRO_CINE',
D
DEFI_COMPOR MATER MONOCRYSTAL,
ECOULEMENT=' ECOU_VISC1',
ECRO_ISOT=' ECRO_ISOT1',
ECRO_CINE=' ECRO_CINE1',
ELAS=' ELAS',
FAMI_SYST_GLIS=' OCTAEDRIQUE'
MODEL AFFE_CARA_ELEM
MASSIF
GROUP_MA=' TOUT',
ANGL_REP
STAT_NON_LINE CARA_ELEM
COMP_INCR
RELATION=' MONOCRISTAL',
COMPOR
CONVERGENCE
RESO_INTE=' IMPLICITE'
STAT_NON_LINE CARA_ELEM
COMP_INCR
RELATION=' MONOCRISTAL',
COMPOR
CONVERGENCE
RESO_INTE=' RUNGE_KUTTA_2'
Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
Code_Aster ®
Version
8.2
Titrate:
SSNV171 - Comparaison POLY_CFC and MONOCRISTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX Key
:
V6.04.171-B Page:
7/8
8.2 Values
tested
Into implicit
Identification Reference Aster %
difference
of
xx
SIEF_ELGA
- 210 - 210
- 5.97E-05
of
xx
EPSI_ELGA_DEPL
- 0.00189
- 0.00189
1E-2
of
yy
EPSI_ELGA_DEPL
0.0005056
0.0005059 6th-3
of
yy
EPSP_ELGA
0.0000686
0.0000687 4.7E-3
V43 of VARI_ELGA
0.0004846
0.0004846 5.8E-8
Into explicit
Identification Reference Aster %
difference
of
xx
SIEF_ELGA
- 210 - 210
- 8.24E-05
of
xx
EPSI_ELGA_DEPL
- 0.00188
- 0.00188 2.25E-4
of
yy
EPSI_ELGA_DEPL
0.0005021
0.0005021 1.83E-6
of
yy
EPSP_ELGA
0.0000682
0.0000682 2.22E-4
V43 of VARI_ELGA
0.0004813
0.0004813 5.21E-4
Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
Code_Aster ®
Version
8.2
Titrate:
SSNV171 - Comparaison POLY_CFC and MONOCRISTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX Key
:
V6.04.171-B Page:
8/8
9
Summary of the results
The results obtained are in perfect agreement with the reference solution.
Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A