Code_Aster ®
Version
7.1
Titrate:
SSNV149 - Test of ENDO_ISOT_BETON


Date:
28/10/03
Author (S):
P. BADEL, V. GODARD Key
:
V6.04.149-B Page:
1/6

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

Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
Document: V6.04.149

SSNV149 - Test of ENDO_ISOT_BETON

Summary:

One presents in this test two quasi static calculations of an element of volume in homogeneous deformation with
the law of behavior ENDO_ISOT_BETON.

Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/03/008/A

Code_Aster ®
Version
7.1
Titrate:
SSNV149 - Test of ENDO_ISOT_BETON


Date:
28/10/03
Author (S):
P. BADEL, V. GODARD Key
:
V6.04.149-B Page:
2/6

1
Problem of reference

1.1
Geometry and boundary conditions

P
Blockings
8
P7
P1P2P3P4: dz=0
P1P5P8P4: dx=0
P1P5: dy=0
P2P6: dy=0
P4
P3
Traction/compression
P
P2P6P7P3: dx imposed
5
P6
{dx, Dy, dz} are displacements of
nodes according to the three directions.
P1
P2
y
X
Z

Appear 1.1-a: Géométrie and boundary conditions of the uniaxial tests

The boundary conditions adopted ensure a homogeneous deformation in the element.

1.2
Material properties

Elastic behavior:

E = 300000 MPa; = 0 3
.
Damaging behavior:

Y = 3 MPa; AND = - 6000 MPa

2
Reference solution

This test is a test of nonregression.
Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/03/008/A

Code_Aster ®
Version
7.1
Titrate:
SSNV149 - Test of ENDO_ISOT_BETON


Date:
28/10/03
Author (S):
P. BADEL, V. GODARD Key
:
V6.04.149-B Page:
3/6

3 Modeling
With

3.1
Characteristics of modeling

Modeling 3D

Element MECA_HEXA8.

3.2
Characteristics of the grid

A number of nodes: 8

A number of meshs and types: 1 HEXA8

3.3 Functionalities
tested

The law of behavior ENDO_ISOT_BETON.

4
Results of modeling A

4.1
Properties of material

Damaging behavior:

T

= MPa
3
;
threshold
C

=
MPa
225
.
11
;
threshold
E = -
MPa
6000
T

4.2
Way of loading

The element is subjected to a uniaxial traction followed by a discharge and a uniaxial pressing.

4.3 Values
tested

Moment
Name of the field
Component
Place
Aster
24
DEPL
DX N2 ­ 8.006E+06
24
SIEF_ELGA
SIXX
M1, point 1
­ 2.03628E+07
24
VARI_ELGA
V1
M1, point 1
8.14067E-01

Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/03/008/A

Code_Aster ®
Version
7.1
Titrate:
SSNV149 - Test of ENDO_ISOT_BETON


Date:
28/10/03
Author (S):
P. BADEL, V. GODARD Key
:
V6.04.149-B Page:
4/6

5
Results of modeling B

5.1
Properties of material

Damaging behavior:

T

= MPa
3
;
threshold
C

= 40MPa;
threshold
E = -
MPa
6000
T

5.2
Way of loading

The element is subjected to a uniaxial pressing.

5.3 Values
tested

Moment
Name of the field
Component
Place
Aster
25
DEPL
DX N2 ­ 1.28E-05
25
SIEF_ELGA
SIXX
M1, point 1
­ 3.84E+07
25
VARI_ELGA
V1
M1, point 1
0.00E+00
27
DEPL
DX N2 ­ 1.37E-05
27
SIEF_ELGA
SIXX
M1, point 1
­ 4.06405E+07
27
VARI_ELGA
V1
M1, point 1
2.90913 E-02
37
DEPL
DX N2 ­ 1.82E-05
37
SIEF_ELGA
SIXX
M1, point 1
­ 4.55227E+07
37
VARI_ELGA
V1
M1, point 1
1.00E+00

Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/03/008/A

Code_Aster ®
Version
7.1
Titrate:
SSNV149 - Test of ENDO_ISOT_BETON


Date:
28/10/03
Author (S):
P. BADEL, V. GODARD Key
:
V6.04.149-B Page:
5/6

6
Summary of the results

The objective of modeling A is to show refermeture of fissure in compression after one
phase of damaging traction. Modeling B shows the effects of the parameter C


threshold
(constraint threshold in an unconfined compression test). It should be noted that the constraint threshold
does not correspond in calculation exactly to the constraint of initiation of the damage in
compression, this is due to the fact that the criterion is evaluated starting from the deformations with the step of time
precedent and not with the step of current time. The error observed thus depends on the size of the steps on
time.
Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/03/008/A

Code_Aster ®
Version
7.1
Titrate:
SSNV149 - Test of ENDO_ISOT_BETON


Date:
28/10/03
Author (S):
P. BADEL, V. GODARD Key
:
V6.04.149-B Page:
6/6

Intentionally white left page.
Handbook of Validation
V6.04 booklet: Nonlinear statics of the voluminal structures
HT-66/03/008/A

Outline document