Code_Aster
®
Version
5.0
Titrate:
SSLS112 - Offsetting of composite plates
Date:
19/09/02
Author (S):
J. Mr. PROIX, G. BERTRAND
Key
:
V3.03.112-A
Page:
1/4
Manual of Validation
V3.03 booklet: Linear statics of the plates and hulls
HT-66/02/001/A
Organization (S):
EDF/AMA, CS IF
Manual of Validation
V3.03 booklet: Linear statics of the plates and hulls
Document: V3.03.112
SSLS112 - Offsetting of composite plates
Summary:
This test makes it possible to validate the offsetting of composite plates.
The reference is given by a first resolution where one modelizes a quadricouche presenting one
material not-symmetry compared to the average plan.
The validation is done in the second calculation where one modelizes the quadricouche preceding model by
2 double-layered offset compared to the average plan of the first calculation.
Code_Aster
®
Version
5.0
Titrate:
SSLS112 - Offsetting of composite plates
Date:
19/09/02
Author (S):
J. Mr. PROIX, G. BERTRAND
Key
:
V3.03.112-A
Page:
2/4
Manual of Validation
V3.03 booklet: Linear statics of the plates and hulls
HT-66/02/001/A
1
Problem of reference
1.1 Geometry
5 subdivisions
10 subdivisions
co-ordinates of the points (in m): A1 (0,0,0)
A2 (10,0,0) A3 (10,5,0) A4 (0,5,0)
1.2
Material properties
The material consists of 4 orthotropic layers thickness 0.1.
The first layers is characterized by:
EL = 20000.10
6
AP
AND = 20000.10
6
AP
VLT = 0.3
GLT = 2000.10
6
AP
the second layer by:
EL = 15000.10
6
AP
AND = 15000.10
6
AP
VLT = 0.3
GLT = 1500.10
6
AP
the third layer by:
EL = 20000.10
6
AP
AND = 20000.10
6
AP
VLT = 0.3
GLT = 2000.10
6
AP
and the fourth layer by:
EL = 15000.10
6
AP
AND = 15000.10
6
AP
VLT = 0.3
GLT = 1500.10
6
AP
1.3
Boundary conditions and loadings
The A1 node is embedded:
dx = 0.
Dy = 0.
dz = 0.
dRx = 0.
dRy = 0.
dRz = 0.
The A2 node is locked according to following ddls:
dx = 0.
Dy = 0.
One applies a modal force Fz = - 1000.N to the A3 node.
A4
A3
A2
A1
0,4
X
Z
y
Code_Aster
®
Version
5.0
Titrate:
SSLS112 - Offsetting of composite plates
Date:
19/09/02
Author (S):
J. Mr. PROIX, G. BERTRAND
Key
:
V3.03.112-A
Page:
3/4
Manual of Validation
V3.03 booklet: Linear statics of the plates and hulls
HT-66/02/001/A
2
Reference solution
2.1
Method of calculation used for the reference solution
The reference solution results from the first calculation with ASTER with the quadricouche describes in
the problem of reference.
2.2
Results of reference
They are consisted of the values of the field of displacement DX, DY, DZ, DRX, DRY at the A3 point
(N1 node for ASTER) and with the N10 node of co-ordinates (9,2,0).
2.3
Uncertainty on the solution
Null, since it is about the same calculation carried out by two different channels.
3 Modeling
With
3.1
Characteristics of modeling
The model consists of 2 double-layered plates corresponding to the average plan of the quadricouche of
model of reference.
To represent these 2 plates, one leaves the mesh of the average plan of the quadricouche which one offsets
distances - 0.1 and 0.1.
PLAQ1
PLAQ
2
+
0.1
-
0.1
The elements used are elements of
plate DKT.
Code_Aster
®
Version
5.0
Titrate:
SSLS112 - Offsetting of composite plates
Date:
19/09/02
Author (S):
J. Mr. PROIX, G. BERTRAND
Key
:
V3.03.112-A
Page:
4/4
Manual of Validation
V3.03 booklet: Linear statics of the plates and hulls
HT-66/02/001/A
3.2
Characteristics of the mesh
The mesh is regular.
There are 10 subdivisions according to X and 5 subdivisions according to y; that is to say on the whole 50 meshs DKQ (quad4) and 66
nodes.
3.3 Functionalities
tested
Order Mot
key
AFFE_CARA_ELEM
Offsetting
4
Result of modeling A
4.1 Values
tested
Identification Reference
(* 10
- 6
m) ASTER (* 10
- 6
m) %
Difference
DX (N1)
3.680419
3.680419
0
DY (N1)
0.493941
0.493941
0
DZ (N1)
5697.7635
5697.7635
0
DRX (N1)
436.1676
436.1676
0
DRY (N1)
508.6670
508.6670
0
DX (N10)
2.172360
2.172360
0
DY (N10)
0.783905
0.783905
0
DZ (N10)
3946.2632
3946.2632
0
DRX (N10)
412.1209
412.1209
0
DRY (N10)
455.0638
455.0638
0
5 Synthesis
The results obtained with offset multi-layer plates agree with the reference.
This test thus validates offsetting for the multi-layer plates.
5
5
X
Z
y