Stoflo_10.08
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Objectives Overall Process Flow Sequence of Steps the User Should Follow The objectives of this application are the following: 1. Perform rainflow cycle counting on time series data 2. Provide the range and mean of each rainflow cycle to aid in fatigue life calculation (Shee 3. Place each rainflow cycle into a bin based on its range and mean to aid in block cycle tes creation (RangeMean) Disclaimer: We have done our best to ensure the accuracy of all of our calculations, but we a you to double check our calculations before endangering life and limb. We cannot be held resp 1. Peaks and valleys are detected in data. All other points are eliminated to increase speed future calculations. 2. Data without peaks and valleys is plotted alongside original for user to view 3. Peak and valley data is copied to Sheet4 4. Rainflow cycle counting begins 5. If two data points are found to be a rainflow cycle, their range and mean are pasted on Sh 6. The two points of interest are then deleted from Sheet4 and the process continues 7. When rainflow cycle counting has completed (100%), the program goes and stays on Sheet5 8. If the user chooses, the rainflow cycles are binned into 12 columns and 28 rows (sheet Ran 1. Format the time series data so that is fits in two columns as on "Input" sheet 2. Paste the time series data onto "Input" sheet. The plot updates to show your time series d 3. Click the button titled "Clear Data on All Other Sheets." All data from previous calculati cleared. 4. Click the button titled "PV slice, rearrange data, PV slice again." Points not necessary f rainflow counting are deleted. 5. Click the button titled "Next to Rainflow Cycle Counting." The sheet changes to "Sheet4 ra 6. Click the button titled "Click to Begin Counting Rainflow Cycles." Rainflow cycle counting % progress shown. 7. If it is desired to bin the rainflow cycles in order to better visualize the rainflow cycl Click to Get Started Click to Get Started
Transcript of Stoflo_10.08
Objectives
Overall Process Flow
Sequence of Steps the User Should Follow
The objectives of this application are the following:1. Perform rainflow cycle counting on time series data2. Provide the range and mean of each rainflow cycle to aid in fatigue life calculation (Sheet5)3. Place each rainflow cycle into a bin based on its range and mean to aid in block cycle test creation (RangeMean)Disclaimer: We have done our best to ensure the accuracy of all of our calculations, but we advise you to double check our calculations before endangering life and limb. We cannot be held responsible for any consequences you may encounter.
1. Peaks and valleys are detected in data. All other points are eliminated to increase speed of future calculations.2. Data without peaks and valleys is plotted alongside original for user to view3. Peak and valley data is copied to Sheet44. Rainflow cycle counting begins5. If two data points are found to be a rainflow cycle, their range and mean are pasted on Sheet56. The two points of interest are then deleted from Sheet4 and the process continues7. When rainflow cycle counting has completed (100%), the program goes and stays on Sheet58. If the user chooses, the rainflow cycles are binned into 12 columns and 28 rows (sheet RangeMean)
1. Format the time series data so that is fits in two columns as on "Input" sheet2. Paste the time series data onto "Input" sheet. The plot updates to show your time series data.3. Click the button titled "Clear Data on All Other Sheets." All data from previous calculations is cleared.4. Click the button titled "PV slice, rearrange data, PV slice again." Points not necessary for rainflow counting are deleted.5. Click the button titled "Next to Rainflow Cycle Counting." The sheet changes to "Sheet4 rainflow."6. Click the button titled "Click to Begin Counting Rainflow Cycles." Rainflow cycle counting begins. % progress shown.7. If it is desired to bin the rainflow cycles in order to better visualize the rainflow cycles or to develop a block cycle test, click the button titled "Next, to sort data into bins"8. To go back to the original data or the rainflow cycles sorted into two columns, use the tabs at the bottom of the spreadsheet.
Click to Get Started
Click to Get Started
Input
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Time (s) Stress (MPa) or Strain Data This sheet filters to keep only peaks and valleys1 900 ← Please input data in white cells to left
11 411.0121 90032 499.5641 75751 393.9961 829.9971 46481 731.9991 330
101 800.01111 452.01121 689.01131 328.99141 712.01151 420.99161 690.02171 378.01181 870.01191 462.01201 782.01211 116231 -222.97241 53.99251 -222.97261 130271 -236.97281 -32.97291 -253.96301 550.99311 274321 549331 251341 657.99351 192.01361 639.99371 322.99381 578.01391 281.01401 530411 294.01421 574.99431 239.99441 478451 234.01461 518.99471 295.99481 644.99
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Clear Data on All Sheets
2. --> Next to Rainflow Cycle Counting1. PV slice, rearrange data, PV slice again
Clear Data on Left Insert Original Data on Left Again
Input
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This sheet filters to keep only peaks and valleys← Please input data in white cells to left
0 2 4 6 8 10 12
0
2
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Time Series Data
Time (s)
Va
lue
After: Rows 32001-64000
0 2 4 6 8 10 12
0
2
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Time Series Data
Time (s)Before: Rows 32001-64000
2. --> Next to Rainflow Cycle Counting
Insert Original Data on Left Again
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13721 624.9813731 373.0113741 652.0113751 40913761 634.0113771 322.0113781 624.0113791 368.0113801 658.9913811 392.0113821 74813831 355.0113841 675.0113851 36213861 666.9913871 447.0113881 755.0113891 34913901 68313911 314.9913921 69313931 33013941 606.9913951 225.9913961 74413971 443.0113981 754.0113991 503.0114001 708.9914011 42714021 703.0114031 27414041 51614051 257.9914061 587.9914071 141.0114081 457.0114091 220.9914101 42814111 -163.9814121 77.9914131 -250.9714141 526.0114151 313.0114161 72514171 313.9914181 582.0114191 211.9914201 732.99
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14211 318.0114221 629.0114231 356.9914241 75214251 457.9914261 791.0114271 49214281 717.0114291 402.9914301 727.0114311 369.0114321 602.9914331 276.9914341 63614351 35814361 56214371 229.0114381 769.9914391 53514401 839.9914411 54414421 792.0114431 318.0114441 522.0114451 -317.9814461 109.9914471 -232.9714481 28814491 -99.9514501 26514511 -119.9614521 703.0114531 1414541 592.0114551 16214561 53014571 229.0114581 577.0114591 216.9914601 61314611 164.0114621 592.9914631 318.9914641 63214651 397.9914661 62314671 249.9914681 788.9914691 256
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14701 475.0114711 -386.9814721 23214731 -346.9614741 132.9914751 -140.9814761 14014771 -128.9614781 54414791 303.0114801 643.9914811 35814821 642.0114831 364.9914841 67314851 336.0114861 889.0114871 364.9914881 66914891 447.0114901 81314911 50614921 816.9914931 536.9914941 77614951 523.9914961 749.0114971 541.9914981 867.9914991 545.0115001 871.0115011 415.0115021 690.0215031 471.0115041 788.9915051 486.9915061 70615071 452.0115081 66915091 192.0115101 512.0115111 -226.9715121 9315131 -188.9615141 518.0115151 29315161 593.9915171 8915181 576
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15191 36215201 788.9915211 19115221 448.9915231 151.0215241 47815251 238.0115261 500.9915271 104.0115281 78615291 299.0115301 83215311 610.0115321 829.0115331 53015341 73415351 -317.9815361 727.9915371 8315381 44115391 -6.9515401 51115411 4615421 894.9915431 40515441 876.9915451 60915461 875.9915471 629.9915481 88815491 527.0115501 796.9915511 -238.9815521 16315531 -101.9715541 63215551 11.0115561 810.9915571 39015581 85515591 271.0115601 578.0115611 323.9915621 675.0115631 220.9915641 63215651 36215661 732.9915671 420.01
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15681 802.9915691 -494.9615701 141.0115711 -295.9615721 99.9915731 -139.9715741 509.9915751 25115761 661.0115771 365.9915781 694.9915791 160.9915801 453.0115811 234.9915821 458.9915831 117.0115841 690.9915851 42815861 764.0115871 -246.9715881 216.9915891 -300.9615901 14915911 -206.9615921 156.9915931 -73.9715941 221.9915951 -65.9815961 280.0115971 -203.9715981 560.9915991 197.0116001 560.9916011 15316021 49216031 27016041 606.9916051 239.9916061 644.9916071 202.0116081 57116091 21316101 694.9916111 -447.9816121 103.0116131 -311.9716141 128.9916151 -137.9616161 508.01
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16171 304.0116181 602.9916191 67.0116201 625.9916211 341.9916221 601.0116231 285.9916241 57616251 220.9916261 721.0116271 314.9916281 63616291 304.0116301 66916311 336.9916321 605.0116331 36716341 56716351 280.0116361 513.9916371 -285.9616381 94.0116391 -132.9616401 355.0116411 35.9916421 457.9916431 146.0116441 50616451 294.0116461 577.0116471 -10.9816481 221.9916491 -340.9816501 94.0116511 -226.9716521 49.9916531 -155.9616541 328.9916551 1916561 58516571 164.9916581 397.9916591 17616601 82216611 560.9916621 801.0116631 55316641 77616651 -257.95
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16661 192.0116671 -124.9716681 46416691 211.0116701 73016711 151.9916721 834.0116731 351.9916741 642.0116751 285.0116761 587.0116771 -221.9616781 23316791 -135.9816801 25116811 1816821 527.9916831 3316841 448.9916851 234.0116861 625.9916871 225.9916881 480.0116891 34.9916901 593.9916911 188.9916921 518.0116931 4716941 588.9916951 62.9916961 448.9916971 20516981 644.9916991 -228.9817001 336.0117011 86.9917021 797.9917031 52917041 75317051 5117061 411.9917071 188.0117081 90017091 490.0117101 262.9917111 53417121 44.9917131 69317141 397.99
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17151 67817161 328.9917171 671.0117181 433.0117191 695.9917201 28317211 554.0117221 188.9917231 489.0117241 -366.9717251 -198.84066717261 -343.46323817271 -488.0858117281 -632.70838117291 -777.33095217301 -921.95352417311 -90017321 -900
PV Slice
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Time (s) Stress (MPa) or Strain Data TRUE=PEAK or VALLEY1
0 #DIV/0! #DIV/0!0 #DIV/0! #DIV/0!
Stress (MPa) or Strain Data
Max filter: 930 Cells above this value will be removed.Min filter: -930 Cells below this value will be removed.
Current Max: 0Current Min: 0
If desired, enter "filter" values for minimum and/or maximum. This would prevent count data below a certain threshold and ignore spikes (if needed).
Click to Begin Counting Rainflow Cycles
If Desired, Click to Filter Data Using Max and Min
take difference of 2 pointsif difference is less than next 2 points, cut and paste the 2 pointsif difference is not less than next 2 points, leave the 2 points and go to the next difference
Cells above this value will be removed. do until cell a4 is empty (only 2 points remaining)Cells below this value will be removed.
If Desired, Click to Filter Data Using Max and Min
if difference is not less than next 2 points, leave the 2 points and go to the next difference
range meanmax 0 0min 0 0 What would you like to do next?diff 0 0
diff/12 0diff/28 0
Sort data into bins to develop block cycle test.
If this is Stress data, click here to go on and estimate the fatigue life of your component.
What would you like to do next?
Sort data into bins to develop block cycle test.
If this is Stress data, click here to go on and estimate the fatigue life of your component.
Range a low 0 0 0 0 0 0
mid 0 0 0 0 0 0
low mid high 0 0 0 0 0 0
0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
Mean
ClicktoBegin
GoBack
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 0
0000000000000000000000000000
Material: RQC-100 Steel Palmgren-Miner's Rule used with all six life estimation techniques
931 Mpa 1181 Strain-life
b or B = -0.07 1330 Morrow ε-N SWT
E = 200000 Mpa 1181
K' = 1434 Mpa -0.07 repeats repeats repeats
n' = 0.14 Max nominal stress: 0
1240 Mpa Min nominal stress: 0
c = -0.69
0.66 Blue = mat'l properties required only for strain-life eqns.
1 Green = mat'l props. req'd only for stress-life eqns.
From sheet "RF Cycles" LAST LAST
ΔS (Mpa) Δ Max Δε Δσ
aEnter known values a
Su = A = (σf')(2b) =
σf = No Sm Correct
AKt or AKf =
BKt or BKf =
σf' =Yellow = material properties required for both strain-life & stress-life equations
εf' =
Kt or Kf =(Notch factor)
LH side of Neuber/Ramberg-Osgood eqn (for local stress)
Formulas for Goal Seek
Smean Smax (Kt*ΔS)2/E (Kt*Smax)2/E εa σa
Click to Begin Click to View Graphs
Palmgren-Miner's Rule used with all six life estimation techniques Neuber eqn.: Morrow strain-life eqn.:
Mod. Goodman Morrow S-N:
Ramberg-Osgood eqn.: Smith-Watson-Topper (SWT) eqn.:
repeats repeats repeats
SWT 0 LH side Formula Morrow 0
formula Dmg. Mean formula Damage Formula
NEI = Not Enough Infor- mation
Stress-life, SNf=A(Nf)B (KtΔS)2/E=ΔεΔσ εa=((σf'-σmean)/E)(2Nf)b+εf'(2Nf)c
Solve for NfNo Sm Correct
ε=σ/E+(σ/K')(1/n') σmaxεaE=(σf')2(2N)2b+σf'εf'E(2N)(b+c)
Solve for Nf
Strain Life
σmax Nf (Kt*Smean)2/E σmean Nf
CLEAR DATAClick to View Graphs
Morrow strain-life eqn.: Modified Goodman eqn.:
Smith-Watson-Topper (SWT) eqn.: Morrow stress-life eqn.:
Stress Life
0 0 0 0
Damage Dmg. Dmg.
'-σmean)/E)(2Nf)b+εf'(2Nf)c
Solve for Nf
(Sa/SNf)+(Sm/Su)=1Solve for SNf
E=(σf')2(2N)2b+σf'εf'E(2N)(b+c)
Solve for Nf
(Sa/SNf)+(Sm/σf)=1Solve for SNf
Goodman:
Morrow:
No Sm correction
Nf Nf Nf (1/Nf) Smin Nf σmax
110
0
1000
0
1000
000
1000
0000
0
1000
0000
000
1000
0000
0000
0
1000
0000
0000
000
1E+0
16
1E+0
18
1E+0
20
0.01
0.1
Strain Life
Morrow
No Mean Stress Correction
SWT
Cycles
Str
ain
1E-01 1E+06 1E+13 1E+201
10
Stress Life
Goodman
No Mean Stress Correction
Morrow
Cycles
Str
es
s
110
0
1000
0
1000
000
1000
0000
0
1000
0000
000
1000
0000
0000
0
1000
0000
0000
000
1E+0
16
1E+0
18
1E+0
20
0.01
0.1
Strain Life
Morrow
No Mean Stress Correction
SWT
Cycles
Str
ain
1E-01 1E+06 1E+13 1E+201
10
Stress Life
Goodman
No Mean Stress Correction
Morrow
Cycles
Str
es
s
GoBack
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