SAE Standard Fatigue Data File format

#SAE Standard Fatigue Data File format #
Pick one: #FDE_plot #FDE_fit # #
#
# Fitted Curve. Manual fit at Nf=1 and fatigue limit.
# SAE4140 Rc=49 AISI Iter 98, 100%Martensite
# ElecFurn. ConCast, Normalized 1650F, AsForged 2150F, 82.6% reduction
# Incls.: TypeA=0.5T 0H TypeB,C=0, TypeD=1.0T 0.5M
# Test: UoToledo
# saedigcurve_v2.2.f starts.
#FileType= strain_life
#DataType= fitted
#Name= SAE4140
#Name= Iter098
#Units= MPa
#Sy= 1622.2
#Su= 1818.3
#E= 205800 (average of 10 obs)
#monotonic_K= 2466.5
#monotonic_n= 0.065
#FractureStrain= .555
#FractureStress= 2017
#%RA= 42.6
#MaterialForm= bar
#FailureDef= 50% load drop
#BHN= 477   #may by 469 ?
#Hardness, Rockwell C= 49
#Basic Oxygen= False
#Electric Furnace= True
#Vacuum Degas= False
#Ladle Refined= False
#Ingot Cast= False
#Continuous Cast= True
#Martensite, %= 100
#Carbon, %= 0.41
#Manganese, %= 0.87
#Phosphorus, %= 0.01
#Sulfur, %= 0.004
#Silicon, %= 0.24
#Copper, %= 0.10
#Nickel, %= 0.05
#Chromium, %= 0.9
#Molybdenum, %= 0.18
#Aluminum, %= 0.020
#Tin, %= 0.005
#Nitrogen, ppm= 58
# SAE4140    Iter098    BHN=  477 Fn=    0
#          Monotonic Props.       Cyclic Props.
#ELAS. MOD.= 29849. KSI,  206. GPA     K'        = 365.2 KSI,  2518.MPA
#YIELD,0.2%=   235. KSI, 1622. MPA     N'        = 0.1056
#ULT. STRG.=   264. KSI, 1818. MPA     F. STRG COEF=  418.3 KSI, 2884.MPA
#K       =      0.0 KSI,      0. MPA   F.STRG EXP, b=-0.1038
#N            = 0.0000                 FAT DUCT COEF=   3.6233
#RED. IN AREA = 42.6                   F.DUCT EXP, c=-0.9831
#T. FRAC. STG.= 292.5 KSI, 2017. MPA   Exp Cyc Yld  =  189. Ksi,1306.MPA
#T. FRAC. STR.= 0.555                  Fit Cyc Yld  =  191. Ksi,1314.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!! Manual fit at Nf=1 and fatigue limit. FAC Jun09
#Stress_Units= MPa
# Total Strain   2Nf  Stress  Mean   Plastic Strain   Initial
#    Amp               Amp   Stress      Amp        Elastic Mod.
    .555            1  2017.       0.    .5452     205800. #Fitted_point manually
    .02           280  1573        0.    .0122     205800. #Fitted_point manually
   0.01540        500  1481.8      0.   0.00820    205800. #Fitted_point
   0.01091       1000  1397.5      0.   0.00412    205800. #Fitted_point
   0.00843       2000  1315.9      0.   0.00203    205800. #Fitted_point
   0.00662       5000  1208.9      0.   0.00075    205800. #Fitted_point
   0.00581      10000  1127.5      0.   0.00033    205800. #Fitted_point
   0.00523      20000  1047.0      0.   0.00014    205800. #Fitted_point
   0.00464      50000   947.0      0.   0.00004    205800. #Fitted_point
   0.00428     100000   878.1      0.   0.00002    205800. #Fitted_point
   0.00397     200000   815.1      0.   0.00001    205800. #Fitted_point
   0.00360     500000   739.7      0.   0.00000    205800. #Fitted_point
   0.00334    1000000   687.8      0.   0.00000    205800. #Fitted_point
   0.00311    2000000   639.8      0.   0.00000    205800. #Fitted_point
    .00300    3000000   621.       0.    .0        205800. #Fitted_point manually
    .00300   10000000   621.       0.    .0        205800. #Fitted_point manually
#
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