SAE Standard Fatigue Data File format

#SAE Standard Fatigue Data File format #
Pick one: #FDE_plot #FDE_fit # #
#
# Fitted Curve !
# SAE8620 Thru Carburized, Rc=58
# Material cyclically hardens.
# ElecFurnace, ConCast 170mm billet, HotRolled 25.4mm
# Specimens machined, heat treated, ground and polished.
# Carburized, 100%Martensite, ASTM Grain Size 5 to 6,
# Inclusions: TypeA=2-2.5Thin
# Test: UoToledo F.Yin and A.Fatemi  April 2004
# saedigcurve_v2.2.f starts.
#FileType= strain_life
#DataType= fitted
#Name= SAE8620
#Name= Carburized
#Name= AisiIt_71
#Stress_units= MPa
#Strain_units= strain
#Sy= 1125.3
#Su= 1868.7
#E= 207900
#monotonic_K= 11109.0
#monotonic_n= 0.372
#FractureStrain= 0.0175 (use graph from original report)
#FractureStress= 1857.
#%RA= 0.1
#MaterialForm= bar
#FailureDef= 50% load drop
#Hardness, Rockwell C= 58.2 at center of gage section
#BHN= 615   converted from HRc
#Basic Oxygen= False
#Electric Furnace= True
#Vacuum Degas= False
#Ladle Refined= False
#Ingot Cast= False
#Continuous Cast= True
#Martensite, %= 100
#ASTM Grain Size No. (Min to Max)= 5 to 6
#Carbon, %= 0.2  (before carburize)
#Manganese, %= 0.96
#Phosphorus, %= 0.008
#Sulfur, %= 0.03
#Silicon, %= 0.24
#Copper, %= 0.15
#Nickel, %= 0.53
#Chromium, %= 0.55
#Molybdenum, %= 0.22
#Aluminum, %= 0.020
#Calcium, %= 0.00
#Tin, %= 0.010
#Nitrogen, ppm= 88
# SAE8620    Carburized BHN=  615 Fn=    0
#          Monotonic Props.       Cyclic Props.
#ELAS. MOD.= 30153. KSI,  208. GPA     K'        =5813.7 KSI, 40084.MPA
#YIELD,0.2%=   163. KSI, 1125. MPA     N'        = 0.4088
#ULT. STRG.=   271. KSI, 1869. MPA     F. STRG COEF=  467.6 KSI, 3224.MPA
#K       =      0.0 KSI,      0. MPA   F.STRG EXP, b=-0.0958
#N            = 0.0000                 FAT DUCT COEF=   0.0021
#RED. IN AREA =  0.1                   F.DUCT EXP, c=-0.2343
#T. FRAC. STG.= 269.3 KSI, 1857. MPA   Exp Cyc Yld  =  458. Ksi,3160.MPA
#T. FRAC. STR.= 0.001                  Fit Cyc Yld  =  416. Ksi,2867.MPA
#No. fatigue data points=   18
#
# 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.
   0.01761          1  3126.8      0.   0.00257    207900. #Fitted_point
   0.01069        100  2062.2      0.   0.00077    207900. #Fitted_point
   0.00994        200  1933.9      0.   0.00064    207900. #Fitted_point
   0.00904        500  1775.6      0.   0.00050    207900. #Fitted_point
   0.00842       1000  1664.0      0.   0.00042    207900. #Fitted_point
   0.00784       2000  1558.9      0.   0.00034    207900. #Fitted_point
   0.00715       5000  1429.7      0.   0.00027    207900. #Fitted_point
   0.00666      10000  1338.9      0.   0.00022    207900. #Fitted_point
   0.00621      20000  1253.6      0.   0.00018    207900. #Fitted_point
   0.00567      50000  1148.9      0.   0.00014    207900. #Fitted_point
   0.00529     100000  1075.4      0.   0.00012    207900. #Fitted_point
   0.00494     200000  1006.5      0.   0.00010    207900. #Fitted_point
   0.00451     500000   922.0      0.   0.00008    207900. #Fitted_point
   0.00421    1000000   862.8      0.   0.00006    207900. #Fitted_point
   0.00393    2000000   807.3      0.   0.00005    207900. #Fitted_point
   0.00360    5000000   739.4      0.   0.00004    207900. #Fitted_point
   0.00336   10000000   691.8      0.   0.00003    207900. #Fitted_point
   0.00336   15000000   691.8      0.   0.00003    207900. #Fitted_point manually
#
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