Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_COQU_MULT


Date:
31/01/05
Author (S):
X. DESROCHES, A. Key M. DONORE
:
U4.42.03-G Page
: 1/4

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

Handbook of Utilization
U4.4- booklet: Modeling
Document: U4.42.03

Operator DEFI_COQU_MULT

1 Goal

To determine the characteristics materials homogenized of a multi-layer hull from
characteristics of each layer. Are taken into account the following characteristics:

·
thickness,
·
type of constitutive material,
·
orientation of fibers compared to a reference axis.

Product a structure of data of the type MATER.

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

Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_COQU_MULT


Date:
31/01/05
Author (S):
X. DESROCHES, A. Key M. DONORE
:
U4.42.03-G Page
: 2/4

2 Syntax

MUl [to subdue] = DEFI_COQU_MULT (


COUCHE
= (_F
(
EPAIS =



EP,



[R]









MATER
= MA
,
[to subdue]








ORIENTATION
=
/
ORIEN
,
[R]














/
0.
,
[DEFAUT]






))


IMPRESSION = _F (UNITE =/links,
[I]














/8,



[DEFAUT]








)









)
Handbook of Utilization
U4.4- booklet: Modeling
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_COQU_MULT


Date:
31/01/05
Author (S):
X. DESROCHES, A. Key M. DONORE
:
U4.42.03-G Page
: 3/4

3 Operands

3.1 Word
key
COUCHE

COUCHE = _F

Key word factor for the definition of a layer of the multi-layer composite on the basis of the layer
lower to the roadbase.

3.1.1 Operand
EPAIS


THICK = EP

Thickness of the layer.

3.1.2 Operand
MATER


MATER = MA

Concept MA contains material constitutive of the layer and is produced by the operator
DEFI_MATERIAU under the key word factor ELAS_ORTH.

3.1.3 Operand
ORIENTATION



ORIENTATION = orien

Angle of the 1ère direction of orthotropism (longitudinal direction or direction of fibers) in the plan
tangent with the element compared to the 1ère direction of the reference mark of reference defined in
operator AFFE_CARA_ELEM by the key word factor COQUE and key word ANGL_REP
[U4.42.01].

By defect orien is null, if not it must be provided in degrees and must lie between ­ 90° and
+ 90°.

orien
xréf
normal
fibers
xréf
ANGL_REP
Z
tangent plan with the hull
Y
X

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

Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_COQU_MULT


Date:
31/01/05
Author (S):
X. DESROCHES, A. Key M. DONORE
:
U4.42.03-G Page
: 4/4

3.2 Operand
IMPRESSION



IMPRESSION = _F (

Impression on the unit links (by defect the file resu) of the list of the coefficients
homogenized.

4 Example

MULTI = DEFI_COQU_MULT
(



SLEEP = (_F (THICK = 1.E-3, MATER = MAT1, ORIENTATION = - 20.),



SLEEP = (_F (THICK = 2.E-3, MATER = MAT2, ORIENTATION = 10.),



SLEEP = (_F (THICK = 2.E-3, MATER = MAT2, ORIENTATION = - 10.),



SLEEP = (_F (THICK = 1.E-3, MATER = MAT1, ORIENTATION = 20.),








)

corresponds to the multi-layer one:

Normal
Fibers 4th layer
20°
4
mat1
20°
X 1. E - 3
3
mat2
- 10°
2. E - 3
X
Locate reference
2
mat2
10°
2. E - 3
X
1
mat1
- 20°
1. E - 3
fibers
normal
sub-base
with the hull


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

Outline document