background image
Code_Aster
®
Version
8.2
Titrate:
SSNV171 - Comparison POLY_CFC and MONOCRYSTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX
Key
:
V6.04.171-B
Page:
1/8
Manual of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
Organization (S):
EDF-R & D/AMA















Manual of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
V6.04.171 document



SSNV171 - Comparison POLY_CFC and
MONOCRYSTAL




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 the concept MONOCRYSTAL while using
a law of behavior equivalent to POLY_CFC.
background image
Code_Aster
®
Version
8.2
Titrate:
SSNV171 - Comparison POLY_CFC and MONOCRYSTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX
Key
:
V6.04.171-B
Page:
2/8
Manual of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
1
Problem of reference
1.1 Geometry

One defines an element MA1, containing the P1 nodes, P2, P3, P4, P5, P6, P7 and P8.
1.2
Material properties
Young modulus:
MPa
E 145200
=
Poisson's ratio:
3
.
0
=
Modeling a:
A monocrystal of the type POLY_CFC, directed according to
)
0
,
0
,
30
(
with:
0
=
L
D
0
=
With
D
10
=
NR
40
=
K
5
.
75
0
=
34
.
19
1
=
B
0
=
L
H
77
.
9
1
=
Q
27
.
33
2
-
=
Q
345
.
5
2
=
B
00001
.
0
1
=
C
68
.
36
1
=
D
0
2
=
C
X
Y
Z
P1
P1
P2
P3
P4
P5
P6
P7
P8
background image
Code_Aster
®
Version
8.2
Titrate:
SSNV171 - Comparison POLY_CFC and MONOCRYSTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX
Key
:
V6.04.171-B
Page:
3/8
Manual of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
Modeling b:
ECOU_VISC2 with:
TYPE_PARA=' ECOU_VISC'
10
=
NR
40
=
K
0
=
C
68
,
36
=
D
10
=
With
ECRO_ISOT2 with:
TYPE_PARA=' ECRO_ISOT'
5
.
75
0
=
R
34
.
19
1
=
B
345
.
5
2
=
B
77
.
9
1
=
Q
27
.
33
2
-
=
Q
0
=
H
ECRO_CINE1 with:
TYPE_PARA=' ECRO_CINE'
68
.
36
=
D
The selected orientation is the same one as that of modeling A,
)
0
,
0
,
30
(
.

1.3
Boundary conditions and loadings
·
P4 node
:
0
=
= DY
DX
·
P8 node
:
0
=
=
=
DZ
DY
DX
·
Nodes P2 and P6
:
0
=
DX
·
Nodes P1, P3, P5 and P7:
35
=
FX
The loading is increasing of
0
=
FX
with
35
=
FX
, 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.

background image
Code_Aster
®
Version
8.2
Titrate:
SSNV171 - Comparison POLY_CFC and MONOCRYSTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX
Key
:
V6.04.171-B
Page:
4/8
Manual of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
3 Modeling
With
3.1
Characteristics of the mesh
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 the OCTAHEDRAL system. 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

Controls Options
DEFI_TEXTURE SYST_GLISSEMENT
PLAN
NR, L
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
xx
SIEF_ELGA
- 210 - 210
- 7.38E-05
xx
EPSI_ELGA_DEPL
- 0.0018955 - 0.0018955
- 4.30E-04
yy
EPSI_ELGA_DEPL
0.000503377
0.000503377 9.11E-05
xx
EPSP_ELGA
- 0.000449212
- 0.000449212 5.43E-05
yy
EPSP_ELGA
0.0000694943
0.00006949337 - 3.46E-05

background image
Code_Aster
®
Version
8.2
Titrate:
SSNV171 - Comparison POLY_CFC and MONOCRYSTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX
Key
:
V6.04.171-B
Page:
5/8
Manual of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
5 Modeling
B
5.1
Characteristics of the mesh
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

Controls Options
DEFI_MATERIAU ELAS
ECOU_VISC2
ECRO_ISOT2
ECRO_CINE1
E, NAKED
TYPE_PARA=' ECOU_VISC',
NR, K, C, D, A
TYPE_PARA=' ECRO_ISOT',
R_0, B1, B2, Q1, Q2, H
TYPE_PARA=' ECRO_CINE',
D
DEFI_COMPOR MONOCRYSTAL
MATER,
ECOULEMENT=' ECOU_VISC2',
ECRO_ISOT=' ECRO_ISOT2',
ECRO_CINE=' ECRO_CINE1',
ELAS=' ELAS',
FAMI_SYST_GLIS=' OCTAEDRIQUE'
MODEL AFFE_CARA_ELEM
SOLID MASS
GROUP_MA=' TOUT',
ANGL_REP
STAT_NON_LINE CARA_ELEM
COMP_INCR
RELATION=' MONOCRISTAL',
COMPOR

6.2 Values
tested

Identification Reference
Aster %
difference
xx
SIEF_ELGA
- 210 - 210
- 7.38E-05
xx
EPSI_ELGA_DEPL
- 0.00189 - 0.00189
- 4.30E-04
yy
EPSI_ELGA_DEPL
0.0005033 0.0005033
9.15E-05
xx
EPSP_ELGA
- 0.000449 - 0.000449
5.66E-05
yy
EPSP_ELGA
0.0000695 0.0000695
- 3.23E-05
background image
Code_Aster
®
Version
8.2
Titrate:
SSNV171 - Comparison POLY_CFC and MONOCRYSTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX
Key
:
V6.04.171-B
Page:
6/8
Manual of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
7 Modeling
C
7.1
Characteristics of the mesh
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

Controls Options
DEFI_MATERIAU ELAS
ECOU_VISC1
ECRO_ISOT1
ECRO_CINE1
E, NAKED
TYPE_PARA=' ECOU_VISC',
NR, K, C
TYPE_PARA=' ECRO_ISOT',
R_0, B1, B2, Q1, Q2, H
TYPE_PARA=' ECRO_CINE',
D
DEFI_COMPOR MONOCRYSTAL
MATER,
ECOULEMENT=' ECOU_VISC1',
ECRO_ISOT=' ECRO_ISOT1',
ECRO_CINE=' ECRO_CINE1',
ELAS=' ELAS',
FAMI_SYST_GLIS=' OCTAEDRIQUE'
MODEL AFFE_CARA_ELEM
SOLID MASS
GROUP_MA=' TOUT',
ANGL_REP
STAT_NON_LINE CARA_ELEM
COMP_INCR
CONVERGENCE
RELATION=' MONOCRISTAL',
COMPOR
RESO_INTE=' IMPLICITE'
STAT_NON_LINE CARA_ELEM
COMP_INCR
CONVERGENCE
RELATION=' MONOCRISTAL',
COMPOR
RESO_INTE=' RUNGE_KUTTA_2'
background image
Code_Aster
®
Version
8.2
Titrate:
SSNV171 - Comparison POLY_CFC and MONOCRYSTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX
Key
:
V6.04.171-B
Page:
7/8
Manual of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
8.2 Values
tested
Into implicit
Identification Reference Aster %
difference
xx
SIEF_ELGA
- 210 - 210
- 5.97E-05
xx
EPSI_ELGA_DEPL
- 0.00189
- 0.00189
1E-2
yy
EPSI_ELGA_DEPL
0.0005056
0.0005059 6th-3
yy
EPSP_ELGA
0.0000686
0.0000687 4.7E-3
43
V
VARI_ELGA
0.0004846
0.0004846 5.8E-8
Into explicit
Identification Reference Aster %
difference
xx
SIEF_ELGA
- 210 - 210
- 8.24E-05
xx
EPSI_ELGA_DEPL
- 0.00188
- 0.00188 2.25E-4
yy
EPSI_ELGA_DEPL
0.0005021
0.0005021 1.83E-6
yy
EPSP_ELGA
0.0000682
0.0000682 2.22E-4
43
V
VARI_ELGA
0.0004813
0.0004813 5.21E-4
background image
Code_Aster
®
Version
8.2
Titrate:
SSNV171 - Comparison POLY_CFC and MONOCRYSTAL
Date:
02/11/05
Author (S):
J. EL GHARIB, T. KANIT, J.M. PROIX
Key
:
V6.04.171-B
Page:
8/8
Manual of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/05/005/A
9
Summary of the results
The results obtained are in perfect agreement with the reference solution.