background image
Code_Aster
®
Version
7.4
Titrate:
Operator
DEFI_COQU_MULT
Date:
31/01/05
Author (S):
X. DESROCHES, A.M. DONORE
Key
:
U4.42.03-G
Page
:
1/4
Instruction manual
U4.4- booklet: Modeling
HT-66/05/004/A
Organization (S):
EDF-R & D/AMA














Instruction manual
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.
background image
Code_Aster
®
Version
7.4
Titrate:
Operator
DEFI_COQU_MULT
Date:
31/01/05
Author (S):
X. DESROCHES, A.M. DONORE
Key
:
U4.42.03-G
Page
:
2/4
Instruction manual
U4.4- booklet: Modeling
HT-66/05/004/A
2 Syntax

MUl [to subdue] = DEFI_COQU_MULT
(
SLEEP
= (_F
(
THICK =
EP
,
[R]
MATER
= MA
,
[to subdue]
ORIENTATION
=
/
ORIEN
,
[R]
/
0.
,
[DEFECT]
))

IMPRESSION = _F (
UNIT
=
/
links,
[I]
/8,
[DEFECT]
)

)
background image
Code_Aster
®
Version
7.4
Titrate:
Operator
DEFI_COQU_MULT
Date:
31/01/05
Author (S):
X. DESROCHES, A.M. DONORE
Key
:
U4.42.03-G
Page
:
3/4
Instruction manual
U4.4- booklet: Modeling
HT-66/05/004/A
3 Operands
3.1 Word
key
SLEEP
SLEEP = _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
THICK
THICK = EP
Thickness of the layer.
3.1.2 Operand
MATER
MATER = MA
The concept
MA
the material constitutive of the layer contains 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
the operator
AFFE_CARA_ELEM
by the key word factor
HULL
and the 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°.
X
ref.
orien
X
ref.
X
Y
Z
fibers
ANGL_REP
tangent plan with the hull
normal
background image
Code_Aster
®
Version
7.4
Titrate:
Operator
DEFI_COQU_MULT
Date:
31/01/05
Author (S):
X. DESROCHES, A.M. DONORE
Key
:
U4.42.03-G
Page
:
4/4
Instruction manual
U4.4- booklet: Modeling
HT-66/05/004/A
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
with the hull
4
3
2
1
sub-base
Normal
X
X
X
1. E - 3
mat1
mat2
mat2
mat1
20°
- 10°
- 20°
10°
2. E - 3
2. E - 3
1. E - 3
fibers
20°
Fibers 4th layer
Identify reference