SAE Standard Fatigue Data File format

#SAE Standard Fatigue Data File format #
Pick one: #FDE_plot #FDE_fit # #
#
# Fitted Curve.
# SAE4140 Rc41.5 Induction Hardened from ConCast 30mm bar
# Elec. Furnace, Final 15%Bainite, 85%Martensite
# Inclusions: TypeA(sulfide) 4.0 Thin
# Test: UToledo
# saedigcurve_v2.2.f starts.
#FileType= strain_life
#DataType= fitted
#Name= SAE4140
#Name= AisiIt_97
#Stress_units= MPa
#Strain_units= strain
#Sy= 1167.1
#Su= 1239.5
#E= 206500
#monotonic_K= 1459.7
#monotonic_n= 0.038
#FractureStrain= .64
#FractureStress= 1537
#%RA= 47.2
#MaterialForm= bar
#FailureDef= 50% load drop
#  ? #BHN= 416.7 reported? probably wrong.
#Hardness, Rockwell C= 41.5
#BHN= 385
#Basic Oxygen= False
#Electric Furnace= True
#Vacuum Degas= False
#Ladle Refined= False
#Ingot Cast= False
#Continuous Cast= True
#Bainite, %= 15
#Martensite, %= 85
#Carbon, %= 0.4
#Manganese, %= 0.85
#Phosphorus, %= 0.013
#Sulfur, %= 0.077
#Silicon, %= 0.28
#Copper, %= 0.23
#Nickel, %= 0.15
#Chromium, %= 0.99
#Molybdenum, %= 0.21
#Vanadium, %= 0.01
#Aluminum, %= 0.010
# SAE4140    AisiIt_97  BHN=  385 Fn=    0
#          Monotonic Props.       Cyclic Props.
#ELAS. MOD.= 29950. KSI,  207. GPA     K'        = 224.5 KSI,  1548.MPA
#YIELD,0.2%=   169. KSI, 1167. MPA     N'        = 0.0940
#ULT. STRG.=   180. KSI, 1240. MPA     F. STRG COEF=  234.4 KSI, 1616.MPA
#K       =      0.0 KSI,      0. MPA   F.STRG EXP, b=-0.0706
#N            = 0.0000                 FAT DUCT COEF=   1.5793
#RED. IN AREA = 47.2                   F.DUCT EXP, c=-0.7509
#T. FRAC. STG.= 222.9 KSI, 1537. MPA   Exp Cyc Yld  =  125. Ksi, 863.MPA
#T. FRAC. STR.= 0.640                  Fit Cyc Yld  =  123. Ksi, 851.MPA
#No. fatigue data points=   18
#
# NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n'
# NOTE!! ShortLife and Fatigue limit points fitted manually FAC June09
#Stress_Units= MPa
# Total Strain   2Nf  Stress  Mean   Plastic Strain   Initial
#    Amp               Amp   Stress      Amp        Elastic Mod.
    .64             1  1537.       0.    .633      206500. #Fitted_point manually
   0.01990        500  1046.6      0.   0.01483    206500. #Fitted_point
   0.01363       1000   992.1      0.   0.00883    206500. #Fitted_point
   0.00982       2000   940.6      0.   0.00527    206500. #Fitted_point
   0.00692       5000   877.2      0.   0.00268    206500. #Fitted_point
   0.00565      10000   832.8      0.   0.00162    206500. #Fitted_point
   0.00482      20000   791.4      0.   0.00099    206500. #Fitted_point
   0.00411      50000   741.3      0.   0.00052    206500. #Fitted_point
   0.00375     100000   706.4      0.   0.00033    206500. #Fitted_point
   0.00347     200000   673.8      0.   0.00021    206500. #Fitted_point
   0.00318     500000   633.3      0.   0.00011    206500. #Fitted_point
   0.00300    1000000   610        0.   0.00007    206500. #Fitted_point
   0.00294    5000000   604.       0.   0.00001    206500. #Fitted_point
   0.00294   10000000   604.       0.   0.00001    206500. #Fitted_point Manual fit
#
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