Code_Aster
®
Version
4.0
Titrate:
SZLZ103 Method RAINFLOW
Date:
19/01/98
Author (S):
A. Mr. DONORE
Key:
V9.01.103-A
Page:
1/6
Manual of Validation
V9.01 booklet: Tire
HI-75/96/038 - Ind A
Organization (S):
EDF/IMA/MN
Manual of Validation
V9.01 booklet: Tire
Document: V9.01.103
SZLZ103 - Method RAINFLOW
Summary:
The purpose of this test is to test the method of counting of cycles RAINFLOW starting from a history of
loading in stresses.
The functionality of filtering of the history of loading, and the taking into account of a coefficient are also tested
of stress concentration K
T
.
This example is a test of validation of software POSTDAM developed by Department REME, provided in
the Manual of Validation of version 1.0 of this software.
Results provided by the operator
POST_FATIGUE
[U4.67.01] are completely identical to those provided by
software POSTDAM.
Code_Aster
®
Version
4.0
Titrate:
SZLZ103 Method RAINFLOW
Date:
19/01/98
Author (S):
A. Mr. DONORE
Key:
V9.01.103-A
Page:
2/6
Manual of Validation
V9.01 booklet: Tire
HI-75/96/038 - Ind A
1
Problem of reference
1.1 Geometry
The analysis consists in extracting the elementary cycles by the method of counting of cycles of
RAINFLOW [R7.04.01].
One filters initially the history of loading in stresses with a level of filter of 0.9.
Then one applies a coefficient of stress concentration K
T
= 1.
History of the loading
T
0.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
1 (T)
4.
7.
2.
10.
9.6
9.8
5.
9.
3.
4.
2.
2.4
2.2
12.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
5.
11.
1.
4.
3.
10.
6.
8.
12.
4.
8.
1.
9.
4.
6.
Code_Aster
®
Version
4.0
Titrate:
SZLZ103 Method RAINFLOW
Date:
19/01/98
Author (S):
A. Mr. DONORE
Key:
V9.01.103-A
Page:
3/6
Manual of Validation
V9.01 booklet: Tire
HI-75/96/038 - Ind A
2
Reference solution
2.1
Method of calculation used for the reference solution
This test results from the manual of validation of software POSTDAM version 1.0. Reference solutions
are given in this document.
2.2
Results of reference
The counting of the elementary cycles by method RAINFLOW leads to:
Nb_Cycl = 12
Cycle 1
Vale_Min:
5.
Vale_Max:
11.
Cycle 2
Vale_Min:
3.
Vale_Max:
4.
Cycle 3
Vale_Min:
6.
Vale_Max:
10.
Cycle 4
Vale_Min:
1.
Vale_Max:
12.
Cycle 5
Vale_Min:
4.
Vale_Max:
8.
Cycle 6
Vale_Min:
4.
Vale_Max:
6.
Cycle 7
Vale_Min:
4.
Vale_Max:
7.
Cycle 8
Vale_Min:
2.
Vale_Max:
9.
Cycle 9
Vale_Min:
5.
Vale_Max:
9.
Cycle 10
Vale_Min:
3.
Vale_Max:
4.
Cycle 11
Vale_Min:
2.
Vale_Max:
10.
Cycle 12
Vale_Min:
1.
Vale_Max:
12.
2.3
Uncertainty on the solution
Analytical solution.
2.4 References
bibliographical
[1]
Manual of validation POSTDAM 1.0. Baker I., Vatin E. HP-14/93/016/B.
Code_Aster
®
Version
4.0
Titrate:
SZLZ103 Method RAINFLOW
Date:
19/01/98
Author (S):
A. Mr. DONORE
Key:
V9.01.103-A
Page:
6/6
Manual of Validation
V9.01 booklet: Tire
HI-75/96/038 - Ind A
5
Summary of the results
Results
Aster
are perfectly identical to the values of reference provided in the Manual of
Validation of version 1.0 of software POSTDAM.
