SAE Standard Fatigue Data File format

#SAE Standard Fatigue Data File format #
Pick one: #FDE_plot #FDE_fit # #
#
# Fitted Curve. Beware of using this file. Compare to others.
# SAE4140 Rc=42.5, ElecFurnace Concast,Normalized 1650F,Forged Reduc 83%
# Quenched from 1550 into 150F oil, temp. 750F, 100%Martensite,
# Inclusions: typeA(Sulf)3.5T 1.0H, TypeD(glob) 1T 0.fH
# Test: UoToledo
# saedigcurve_v2.2.f starts.
#FileType= strain_life
#DataType= fitted
#Name= SAE4140
#Name= AisiIt_81
#Stress_units= MPa
#Strain_units= strain
#Sy= 1263.2
#Su= 1299.3
#E= 204500
#monotonic_K= 1533.8
#monotonic_n= 0.030
#FractureStrain= 0.13
#FractureStress= 1284
#%RA= 1.3
#MaterialForm= bar
#FailureDef= 50% load drop
#BHN= 395
#Hardness, Rockwell C= 42.5
#Basic Oxygen= False
#Electric Furnace= True
#Vacuum Degas= False
#Ladle Refined= False
#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
#Nitrogen, ppm= 94
# SAE4140    AisiIt_81  BHN=  395 Fn=    0
#          Monotonic Props.       Cyclic Props.
#ELAS. MOD.= 29660. KSI,  205. GPA     K'        = 454.2 KSI,  3131.MPA
#YIELD,0.2%=   183. KSI, 1263. MPA     N'        = 0.1605
#ULT. STRG.=   188. KSI, 1299. MPA     F. STRG COEF=  258.2 KSI, 1780.MPA
#K       =      0.0 KSI,      0. MPA   F.STRG EXP, b=-0.0979
#N            = 0.0000                 FAT DUCT COEF=   0.0296
#RED. IN AREA =  1.3                   F.DUCT EXP, c=-0.6100
#T. FRAC. STG.= 186.2 KSI, 1284. MPA   Exp Cyc Yld  =  167. Ksi,1155.MPA
#T. FRAC. STR.= 0.130                  Fit Cyc Yld  =  162. Ksi,1119.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!! AutoFit not optimal.Curve fitted manually.  FAC Jun09
#Stress_Units= MPa
# Total Strain   2Nf  Stress  Mean   Plastic Strain   Initial
#    Amp               Amp   Stress      Amp        Elastic Mod.
   .013            1  1284.       0.    .007      204500. #Fitted_point manually
  0.0100       24 1220 -40.9 0.00404 204000 #IGL
  0.0065      380 1045 -26.3 0.00139 211000 #IGL
  0.0050     1408 985 -6.7 0.00018 208000 #IGL
  0.00377   10000 748.4 0.   0.00011    204500. #Fitted_point
  0.0028    85000 569 0.0 0.00000 0000 #IGL
  0.0023   272978 465 0.0 0.00000 0000 #None  ???
  0.0023 10000000 465 0.0 0.00000 0000 #Runout
#
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