SAE Standard Fatigue Data File format

#SAE Standard Fatigue Data File format #
Pick one: #FDE_plot #FDE_fit # #
#
# Fitted Curve !
# SAE8620 Thru Carburized 100%Bainite, Rc=49
# ElecFurnace, LadleRefined, ConCast(152x152mm) HotRolled to 29.7mm bar.
# Specimens machined from the cylindrical bars and case carburized then
# reaustenitized and isothermally transformed at 600F for 240min.
# to achieve 0% martensite and 100%Bainite.
# Inclusions: TypeA=1.2T, TypeB=0.5T 0.3H, TypeC= 0.2T, TypeD=1.5T 0.5H
# Hardness traverse: Rc=51.8 near surface Rc=50 in core.
# Test: UoWaterloo, A.Rteil and T.Topper Nov.2006
# saedigcurve_v2.2.f starts.
#FileType= strain_life
#DataType= fitted
#Name= SAE8620
#Name= ThruCarburized
#Name= AisiIt_95
#Stress_units= MPa
#Strain_units= strain
#Sy= 1566.0
#Su= 1785.0
#E= 207800
#monotonic_K= 2242.0
#monotonic_n= 0.058
#FractureStrain= 0.49
#FractureStress= 2409.
#%RA= 39.
#MaterialForm= bar
#FailureDef= 50% load drop
#Hardness, Rockwell C= 49
#BHN= 469
#Basic Oxygen= False
#Electric Furnace= True
#Vacuum Degas= False
#Ladle Refined= True
#Ingot Cast= False
#Continuous Cast= True
#Bainite, %= 100
#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    ThruCarbur BHN=  469 Fn=    0
#          Monotonic Props.       Cyclic Props.
#ELAS. MOD.= 30139. KSI,  208. GPA     K'        = 878.8 KSI,  6059.MPA
#YIELD,0.2%=   227. KSI, 1566. MPA     N'        = 0.2519
#ULT. STRG.=   259. KSI, 1785. MPA     F. STRG COEF=  405.0 KSI, 2792.MPA
#K       =      0.0 KSI,      0. MPA   F.STRG EXP, b=-0.1004
#N            = 0.0000                 FAT DUCT COEF=   0.0462
#RED. IN AREA = 39.0                   F.DUCT EXP, c=-0.3984
#T. FRAC. STG.= 349.4 KSI, 2409. MPA   Exp Cyc Yld  =  184. Ksi,1266.MPA
#T. FRAC. STR.= 0.490                  Fit Cyc Yld  =  178. Ksi,1225.MPA
#No. fatigue data points=   19
#
# 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.
   0.05962          1  2742.0      0.   0.04643    207800. #Fitted_point
   0.00966       1000  1368.6      0.   0.00308    207800. #Fitted_point
   0.00850       2000  1277.7      0.   0.00235    207800. #Fitted_point
   0.00727       5000  1166.9      0.   0.00165    207800. #Fitted_point
   0.00651      10000  1089.8      0.   0.00127    207800. #Fitted_point
   0.00587      20000  1017.8      0.   0.00097    207800. #Fitted_point
   0.00516      50000   930.0      0.   0.00068    207800. #Fitted_point
   0.00470     100000   868.7      0.   0.00052    207800. #Fitted_point
   0.00430     200000   811.4      0.   0.00040    207800. #Fitted_point
   0.00385     500000   741.3      0.   0.00028    207800. #Fitted_point
   0.00355    1000000   692.3      0.   0.00022    207800. #Fitted_point
   0.00328    2000000   646.5      0.   0.00016    207800. #Fitted_point
   0.00296    5000000   590.4      0.   0.00012    207800. #Fitted_point
   0.00274   10000000   551.2      0.   0.00009    207800. #Fitted_point
   0.00274   11000000   551.2      0.   0.00009    207800. #Fitted_point manually
#
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