SAE Standard Fatigue Data File format

#SAE Standard Fatigue Data File format #
Pick one: #FDE_plot #FDE_fit # #
#
# Fitted Curve. Manual fit near Nf=1 and Fatigue limit.  FAC Jun09.
# SAE4140 Rc=49 ElecFurn, VacDegas, LadleRefined, ConCast152x152mm,
# Normalized, Forged 2150 reduced 83%, Quench from 1550F into
# 150F Oil, Tempered 500F, 100%Martensite,
# Inclusions TypeA-0.5T,0H, TypeBC=0, TypeD(glob)=1T0.5H
# Test: UoToledo
#FileType= strain_life
#DataType= fitted
# saedigcurve_v2.2.f starts.
#Name= SAE4140
#Name= AisiIt_77
#Stress_units= MPa
#Strain_units= strain
#Sy= 1602.0
#Su= 1679.9
#E= 203000 (average of 7) TensTest=E=205300
#monotonic_K= 2599.7
#monotonic_n= 0.077
#FractureStrain= 0.013
#FractureStress= 1702.
#%RA= 1.5
#MaterialForm= bar
#FailureDef= 50% load drop
#BHN= 460   #reported as 477
#Hardness, Rockwell C= 49
#Basic Oxygen= False
#Electric Furnace= True
#Vacuum Degas= True
#Ladle Refined= True
#Ingot Cast= False
#Continuous Cast= True
#Martensite, %= 100
#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
#Aluminum, %= 0.010
#Tin, %= 0.009
# SAE4140    AisiIt_77  BHN=  460 Fn=    0
#          Monotonic Props.       Cyclic Props.
#ELAS. MOD.= 29443. KSI,  203. GPA     K'        = 783.0 KSI,  5399.MPA
#YIELD,0.2%=   232. KSI, 1602. MPA     N'        = 0.1930
#ULT. STRG.=   244. KSI, 1680. MPA     F. STRG COEF=  396.8 KSI, 2736.MPA
#K       =      0.0 KSI,      0. MPA   F.STRG EXP, b=-0.1411
#N            = 0.0000                 FAT DUCT COEF=   0.0295
#RED. IN AREA =  1.5                   F.DUCT EXP, c=-0.7309
#T. FRAC. STG.= 246.9 KSI, 1702. MPA   Exp Cyc Yld  =  236. Ksi,1627.MPA
#T. FRAC. STR.= 0.013                  Fit Cyc Yld  =  220. Ksi,1520.MPA
#No. fatigue data points=   21
#
# NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n'
#Stress_Units= MPa
# Total Strain   2Nf  Stress  Mean   Plastic Strain   Initial
#    Amp               Amp   Stress      Amp        Elastic Mod.
    .013            1  1702.       0.   0.0046     203000. #Fitted_point manually.
   0.00945         50  1517.9      0.   0.00198    203000. #Fitted_point
   0.00806        100  1417.2      0.   0.00108    203000. #Fitted_point
   0.00700        200  1310.9      0.   0.00054    203000. #Fitted_point
   0.00592        500  1164.1      0.   0.00019    203000. #Fitted_point
   0.00528       1000  1055.0      0.   0.00008    203000. #Fitted_point
   0.00473       2000   953.1      0.   0.00003    203000. #Fitted_point
   0.00411       5000   832.8      0.   0.00001    203000. #Fitted_point
   0.00371      10000   752.6      0.   0.00000    203000. #Fitted_point
   0.00335      20000   680.7      0.   0.00000    203000. #Fitted_point
   0.00294      50000   596.8      0.   0.00000    203000. #Fitted_point
   0.00266     100000   540.6      0.   0.00000    203000. #Fitted_point
   0.00241     200000   489.8      0.   0.00000    203000. #Fitted_point
    .0023      300000   466.      0.   0.00000    203000. #Fitted_point  manually
    .0023    10000000   466.      0.   0.00000    203000. #Fitted_point  manually
#
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