SAE Standard Fatigue Data File format

#SAE Standard Fatigue Data File format #
Pick one: #FDE_plot #FDE_fit # #
#
# Fitted Curve !
# SAE 9254 Modified: extra Vanadium, Q+T HRc=54
# Material cyclically softens substantially.
# Basic Oxygen, Concast, HotRolled 25mm bar, Spec. machined
# then heat treated: held 45min 1650F in nitrogen, Quenched in
# 150F Oil, Tempered 45min at 770F, then water quenched, Rc=51-55
# Final polish before testing.
# Inclusions: TypeABC=not obsv., TypeD=1.5
# Test: UoWaterloo, M.Khalil and T.Topper May2000
# saedigcurve_v2.2.f starts.
#FileType= strain_life
#DataType= fitted
#Name= SAE9254V
#name= +V_modified
#Name= AisiIt_34
#Stress_units= MPa
#Strain_units= strain
#Sy= 1870.0
#Su= 2050.0
#E= 220000 (estimated from long life) Original report=206000 too low. FAC
#It is not clear if this E change is caused by cyclic deformation
#or some experimental feature.  
#monotonic_K= 2413.0
#monotonic_n= 0.042
#FractureStrain= 0.436
#FractureStress= 2495.
#%RA= 35.1
#MaterialForm= bar
#FailureDef= 50% load drop
#BHN= 536
#Hardness, Rockwell C= 54
#Basic Oxygen= True
#Electric Furnace= False
#Vacuum Degas= False
#Ladle Refined= False
#Ingot Cast= False
#Continuous Cast= True
#Martensite, %= 100
#Carbon, %= 0.52
#Manganese, %= 0.45
#Phosphorus, %= 0.011
#Sulfur, %= 0.011
#Silicon, %= 1.49
#Copper, %= 0.01
#Nickel, %= 0.01
#Chromium, %= 0.72
#Molybdenum, %= 0.09
#Vanadium, %= 0.19
#Columbium/Niobium, %= 0.00
#Aluminum, %= 0.024
#Nitrogen, ppm= 100
# SAE9254V   AisiIt_34  BHN=  536 Fn=    0
#          Monotonic Props.       Cyclic Props.
#ELAS. MOD.= 31908. KSI,  220. GPA     K'        = 489.5 KSI,  3375.MPA
#YIELD,0.2%=   271. KSI, 1870. MPA     N'        = 0.1312
#ULT. STRG.=   297. KSI, 2050. MPA     F. STRG COEF=  589.7 KSI, 4066.MPA
#K       =      0.0 KSI,      0. MPA   F.STRG EXP, b=-0.1213
#N            = 0.0000                 FAT DUCT COEF=   4.1383
#RED. IN AREA = 35.1                   F.DUCT EXP, c=-0.9251
#T. FRAC. STG.= 361.9 KSI, 2495. MPA   Exp Cyc Yld  =  217. Ksi,1494.MPA
#T. FRAC. STR.= 0.436                  Fit Cyc Yld  =  212. Ksi,1461.MPA
#No. fatigue data points=   27
#
# NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n'
# NOTE!! Short life adjusted, Fatigue limit inserted manually.  FAC Aug2009
#Stress_Units= MPa
# Total Strain   2Nf  Stress  Mean   Plastic Strain   Initial
#    Amp               Amp   Stress      Amp        Elastic Mod.
    .9              1  2500.       0.    .89       220000. #Fitted_point manually
   0.01101       2000  1530.1      0.   0.00405    220000. #Fitted_point
   0.00814       5000  1439.3      0.   0.00160    220000. #Fitted_point
   0.00687      10000  1360.9      0.   0.00068    220000. #Fitted_point
   0.00599      20000  1267.3      0.   0.00023    220000. #Fitted_point
   0.00516      50000  1126.4      0.   0.00004    220000. #Fitted_point
   0.00467     100000  1025.2      0.   0.00001    220000. #Fitted_point
   0.00425     200000   935.4      0.   0.00000    220000. #Fitted_point
   0.00378     500000   832.1      0.   0.00000    220000. #Fitted_point
   0.00347    1000000   763.1      0.   0.00000    220000. #Fitted_point
   0.00347   10000000   763.1      0.   0.00000    220000. #Fitted_point manually
#
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