SAE Standard Fatigue Data File format

#SAE Standard Fatigue Data File format #
Pick one: #FDE_plot #FDE_fit # #
#
# Fitted Curve; Manual fit near Nf=1 and fatigue limit.
# SAE4140 Forged the Quenched from 1550F into 150F Oil, Temp 750F
# Source: ElecFurnace, ConCast, Normalized 1650, Forged 2150 82% REDUC.
# 100% Martensite, Inclus.: TypeA 0.5T OH, TypeB 0T OH, TypeC 0T 0H
# TypeD(glob.) 1.0T 1.0H,     Test: UoToledo.
# saedigcurve_v2.2.f starts.
#FileType= strain_life
#DataType= fitted
#Name= SAE4140
#Name= AisiIt_80
#Stress_units= MPa
#Strain_units= strain
#Sy= 1290.7
#Su= 1380.4
#E= 206400
#monotonic_K= 1628.5
#monotonic_n= 0.038
#LowerYield= 1282.2
#UpperYield= 1287.9
#FractureStrain= 26.9
#FractureStress= 1385.
#%RA= 23.6
#MaterialForm= bar
#FailureDef= 50% load drop
#BHN= 394
#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, %= 0.41
#Manganese, %= 0.94
#Phosphorus, %= 0.01
#Sulfur, %= 0.012
#Silicon, %= 0.28
#Copper, %= 0.17
#Nickel, %= 0.15
#Chromium, %= 1.01
#Molybdenum, %= 0.22
#Aluminum, %= 0.028
#Tin, %= 0.010
#Nitrogen, ppm= 94
# SAE4140    AisiIt_80  BHN=  394 Fn=    0
#          Monotonic Props.       Cyclic Props.
#ELAS. MOD.= 29936. KSI,  206. GPA     K'        = 280.3 KSI,  1933.MPA
#YIELD,0.2%=   187. KSI, 1291. MPA     N'        = 0.1182
#ULT. STRG.=   200. KSI, 1380. MPA     F. STRG COEF=  255.3 KSI, 1760.MPA
#K       =      0.0 KSI,      0. MPA   F.STRG EXP, b=-0.0769
#N            = 0.0000                 FAT DUCT COEF=   0.4531
#RED. IN AREA = 23.6                   F.DUCT EXP, c=-0.6511
#T. FRAC. STG.= 200.9 KSI, 1385. MPA   Exp Cyc Yld  =  134. Ksi, 927.MPA
#T. FRAC. STR.= *****                  Fit Cyc Yld  =  134. Ksi, 927.MPA
#No. fatigue data points=   17
#
# NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n'
# NOTE!! Manual fit near Nf=1 and fatigue limit
#Stress_Units= MPa
# Total Strain   2Nf  Stress  Mean   Plastic Strain   Initial
#    Amp               Amp   Stress      Amp        Elastic Mod.
    .269            1  1385.       0.    .262      206400. #Fitted_point manually
   0.02006        200  1158.9      0.   0.01445    206400. #Fitted_point
   0.01321        500  1083.5      0.   0.00796    206400. #Fitted_point
   0.01006       1000  1029.7      0.   0.00507    206400. #Fitted_point
   0.00796       2000   978.4      0.   0.00322    206400. #Fitted_point
   0.00620       5000   914.3      0.   0.00177    206400. #Fitted_point
   0.00532      10000   868.2      0.   0.00112    206400. #Fitted_point
   0.0049      12850 840          27.0  0.00087 210000  #Fitted_point manually
   0.0033     116410 672         0.0    0.00000 0000  #Fitted_point manually
    .0028    2808070 569         0.0    0.00000 0000  #Fitted_point manually
   0.0028   10000000 569         0.0    0.00000 0000  #Fitted_point manually
#
#