SAE Standard Fatigue Data File format

#SAE Standard Fatigue Data File format #
Pick one: #FDE_plot #FDE_fit # #
#
# Fitted Curve !
# SAE8620 Thru Carburized Rc=62 50%Bainite 50%Martensite
# Material cyclically hardens to elastic conditions.
# ElecFurnace, LadleRefined, ConCast(152x152mm) HotRolled to 29.7mm bar
# Spec. machined from the cylindrical bars and case carburized reaustenitized
# and isothermally transformed to achieve 50% martensite and 50% bainite.
# Inclusions: TypeA=1.2T  TypeB=0.5T 0.3H  TypeC=0.2T TypeD=1.5T 0.5H
# Test: UoW A.Rteil and T.Topper June2007
# saedigcurve_v2.2.f starts.
#FileType= strain_life
#DataType= fitted
#Name= SAE8620
#Name= AisiIt_89
#Stress_units= MPa
#Strain_units= strain
#Sy= 1114.0
#Su= 1497.0
#E= 206100
#monotonic_K= 7198.0
#monotonic_n= 0.300
#FractureStrain= 0.013
#FractureStress= 1497.
#%RA= 0 measured
#MaterialForm= bar
#FailureDef= 50% load drop
#Hardness, Rockwell C= 62 on surface, 55 in core
#BHN= 688
#Basic Oxygen= False
#Electric Furnace= True
#Vacuum Degas= False
#Ladle Refined= True
#Ingot Cast= False
#Continuous Cast= True
#Bainite, %= 50
#Martensite, %= 50
#Carbon, %= 0.21
#Manganese, %= 0.83
#Phosphorus, %= 0.009
#Sulfur, %= 0.032
#Silicon, %= 0.25
#Copper, %= 0.15
#Nickel, %= 0.46
#Chromium, %= 0.5
#Molybdenum, %= 0.2
#Vanadium, %= 0.00
#Columbium/Niobium, %= 0.00
#Aluminum, %= 0.024
#Lead, %= 0.001
#Titanium, %= 0.002
#Calcium, %= 0.00
#Cobalt, %= 0.006
#Zirconium, %= 0.001
#Boron, %= 0.0003
#Tin, %= 0.006
#Oxygen, ppm= 9
#Nitrogen, ppm= 63
# SAE8620    AisiIt_89  BHN=  688 Fn=    0
#          Monotonic Props.       Cyclic Props.
#ELAS. MOD.= 29892. KSI,  206. GPA     K'        =   0.0 KSI,     0.MPA
#YIELD,0.2%=   162. KSI, 1114. MPA     N'        = 0.0000
#ULT. STRG.=   217. KSI, 1497. MPA     F. STRG COEF=  333.2 KSI, 2297.MPA
#K       =      0.0 KSI,      0. MPA   F.STRG EXP, b=-0.0853
#N            = 0.0000                 FAT DUCT COEF=   0.0000
#RED. IN AREA =  0.0                   F.DUCT EXP, c= 0.0000
#T. FRAC. STG.= 217.1 KSI, 1497. MPA   Exp Cyc Yld  =    0. Ksi,   0.MPA
#T. FRAC. STR.= 0.013                  Fit Cyc Yld  =    0. Ksi,   0.MPA
#No. fatigue data points=   19
#
# NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n'
# NOTE!! No plastic strain vs life data.  Use elastic to fit.
#Stress_Units= MPa
# Total Strain   2Nf  Stress  Mean   Plastic Strain   Initial
#    Amp               Amp   Stress      Amp        Elastic Mod.
   0.01115          1   2298.      0.       0.     206100. #Fitted_point
   0.00753        100   1551.      0.       0.     206100. #Fitted_point
   0.00323    2000000    665.7     0.       0.     206100. #Fitted_point
    .00302    4000000     622.4    0.       0.     206100. #Fitted_point manually
    .00302   10000000     622.4    0.       0.     206100. #Fitted_point manually
#
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