SAE Standard Fatigue Data File format

#SAE Standard Fatigue Data File format #
Pick one: #FDE_plot #FDE_fit # #
#
# Fitted Curve !
# SAE4620 Q+T to HRc=29.6 Simulated Core of Carburized process.
# ElecFrunace, ConCast(175mmBillet), HotRoll to 48mmBar,
# Machine to 0.5inch bar, Heat treat, Final machine, polish
# 50% Bainite, 50%Martensite, ASTMgrainSize=4to5,
# Inclusions: TypeA=2.5Thin, TypeB,C,D=none
# Test: UoToledo, F.Yin, A.Fatemi, March 2002
# saedigcurve_v2.2.f starts.
#FileType= strain_life
#DataType= fitted
#Name= SAE4620
#Name= AisiIt_53
#Stress_units= MPa
#Strain_units= strain
#Sy= 891.5
#Su= 963.7
#E= 208000 (avg. of 17) original reported=211000
#monotonic_K= 1199.8
#monotonic_n= 0.056
#FractureStrain= 0.95
#FractureStress= 1652
#%RA= 62.
#MaterialForm= bar
#FailureDef= 50% load drop
#BHN= 289
#Hardness, Rockwell C= 29.6
#Basic Oxygen= False
#Electric Furnace= True
#Vacuum Degas= False
#Ladle Refined= False
#Ingot Cast= False
#Continuous Cast= True
#Bainite, %= 50
#Martensite, %= 50
#ASTM Grain Size No. (Min to Max)= 4 to 5
#Carbon, %= 0.2
#Manganese, %= 0.67
#Phosphorus, %= 0.008
#Sulfur, %= 0.03
#Silicon, %= 0.2
#Copper, %= 0.16
#Nickel, %= 1.6
#Chromium, %= 0.19
#Molybdenum, %= 0.24
#Aluminum, %= 0.027
#Tin, %= 0.010
# SAE4620    AisiIt_53  BHN=  289 Fn=    0
#          Monotonic Props.       Cyclic Props.
#ELAS. MOD.= 30168. KSI,  208. GPA     K'        = 176.3 KSI,  1216.MPA
#YIELD,0.2%=   129. KSI,  891. MPA     N'        = 0.0988
#ULT. STRG.=   140. KSI,  964. MPA     F. STRG COEF=  177.0 KSI, 1220.MPA
#K       =      0.0 KSI,      0. MPA   F.STRG EXP, b=-0.0677
#N            = 0.0000                 FAT DUCT COEF=   1.0396
#RED. IN AREA = 62.0                   F.DUCT EXP, c=-0.6855
#T. FRAC. STG.= 239.6 KSI, 1652. MPA   Exp Cyc Yld  =   95. Ksi, 658.MPA
#T. FRAC. STR.= 0.950                  Fit Cyc Yld  =   97. Ksi, 667.MPA
#No. fatigue data points=   17
#
# 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.
    .95             1  1652.       0     .942      208000. #Fitted_point manually
    .0199         332   860.       0.    .0158     208000. #Fitted_point manually
   0.01281       1000   771.6      0.   0.00910    208000. #Fitted_point
   0.00918       2000   736.8      0.   0.00564    208000. #Fitted_point
   0.00633       5000   693.1      0.   0.00299    208000. #Fitted_point
   0.00503      10000   661.6      0.   0.00185    208000. #Fitted_point
   0.00417      20000   631.3      0.   0.00114    208000. #Fitted_point
   0.00345      50000   593.0      0.   0.00059    208000. #Fitted_point
   0.00308     100000   565.3      0.   0.00036    208000. #Fitted_point
   0.00281     200000   538.7      0.   0.00022    208000. #Fitted_point
   0.00254     500000   505.2      0.   0.00011    208000. #Fitted_point
   0.0023     1000000   466.       0.    .0        208000  #Fitted_point data
   0.0023    10000000   466.       0.    .0        208000  #Fitted_point data
#
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