
Section 6. Data Table Declarations and Output Processing Instructions
The next stress cycle to get counted would be the -300 to 100 cycle depicted
below. It would have an amplitude value of 400 and a mean value of -200, thus
a count would be added to bin 3. A new vector from 950 to 0 would be drawn.
CYCLIC STRESS
100
-500
450
-300
100
-500
-600
-400
-200
0
200
400
600
0123456789
Peak Values
Stress/Strain Values
CYCLIC STRESS
100
-500
450
-500
-600
-400
-200
0
200
400
600
0123456789
Peak Values
Stress/Strain Values
At this point, we are out of new data points, and we will assume that the Data
Table's output has been triggered. We would bring across the 100 and -500
points to finish off the output for the rainflow histogram. We would count a
stress cycle from -500 to 100 that has an amplitude value of 600 and a mean
value of -200, resulting in a count being added to Bin 3. We would then add
one last stress cycle from -500 to 450, with an amplitude value of 950 and a
mean value of -25. This count would go into bin 5.
CYCLIC STRESS
-500
450
-500
100
-500
-600
-400
-200
0
200
400
600
0 2 4 6 8 10121
Peak Values
Stress/Strain Values
Starting
Point
4
The result of these counts is shown in the table below:
Amplitude Column Bin Ranges
Mean Range
0 to 200 200 to 400 400 to 600 600 to 800 800 to 1000
-500 to 0
BIN 1 :
0
BIN 2 :
0
BIN 3 :
2
BIN 4 :
0
BIN 5 :
1
0 to 500
BIN 6 :
1
BIN 7 :
0
BIN 8 :
0
BIN 9 :
0
BIN 10 :
0
The record stored to the Data Table would look something like:
Time Stamp, Record Number, 0,0,2,0,1,1,0,0,0,0
6-30
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