SAE Standard Fatigue Data File format

#SAE Standard Fatigue Data File format #
Pick one: #FDE_plot #FDE_fit # #
#
#Copyright (C) 2011  F.D.E. Committee
#This data file is free software - you can redistribute it and/or
#modify it under the terms of the GNU General Public License as
#published by the Free Software Foundation; either version 2 of the
#license, or (at your option) any later version.
#This data file is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY - without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General PUblic License for more details.
#You should have received a copy of the GNU General PUblic License
#along with this program - if not, write to the Free Software
#Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
#Try also their web site: http://www.gnu.org/copyleft/gpl.html
#
# NOTE:   Fitted data  !!
# SAE4340 heatTreated Q+T to Su=1240mpa=180ksi
# Specimens from 0.75in diam. Rod, Crucible Steel Heat 136820
# 0.43C wt% .71Mn .01P .013S .24Si .86Cr 1.79Ni .27Mo .09Cu
# Ref.: NAEC-ASL-1105 Report. Also: T.Endo and J.Morrow, "Cyclic Stress-Strain and
# Fatigue Behavior of Representative Aircraft Metals," ASTM J.Matls. V4 N1,
# March 1969, pp.159-157.
# Apparently test data points were average values of several tests.
# NOTE: test data ends at about 2Nf=120000. reversals.
# NOTE: Original test data digitized from graphs and may contain errors.
#
#FileType= strain_life
#DataType= fitted
#TIMEcol= 0
#NAME=  SAE4340
#NAME=  HeatTreated
#NAME=  SteelRod
#Stress_units= mpa
#Strain_units= strain
#Sy=      1180.  0.2pc offset =171ksi
#Su=      1240.  #  = 180ksi
#eu=        0   #strain at Su not reported
#E=      179000.
#FractureStrain= 0.84 #computed from %RA
#FractureStress=  1910.
#BHN=    0. # not reported
#%RA= 57 %
# saedigcurve_v2.2.f starts.
#
# 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.
 0.85              1   1910.      0     0.839      179000. #Fitted_point monotonic
   0.21682         10  1475.4      0.   0.20858    179000. #Fitted_point
   0.13574         20  1362.5      0.   0.12812    179000. #Fitted_point
   0.07415         50  1226.5      0.   0.06730    179000. #Fitted_point
   0.04770        100  1132.8      0.   0.04137    179000. #Fitted_point
   0.03129        200  1046.4      0.   0.02545    179000. #Fitted_point
   0.01869        500   942.6      0.   0.01342    179000. #Fitted_point
   0.01317       1000   871.4      0.   0.00830    179000. #Fitted_point
   0.00966       2000   806.1      0.   0.00515    179000. #Fitted_point
   0.00684       5000   728.5      0.   0.00277    179000. #Fitted_point
   0.00553      10000   675.9      0.   0.00175    179000. #Fitted_point
   0.00463      20000   628.2      0.   0.00112    179000. #Fitted_point
   0.00382      50000   571.8      0.   0.00063    179000. #Fitted_point
   0.00339     100000   533.4      0.   0.00041    179000. #Fitted_point
#Test data ends at about 2Nf = 120000. reversals
#thus data below is extrapolated
   0.00305     200000   498.1      0.   0.00027    179000. #Fitted_point
   0.00270     500000   455.1      0.   0.00016    179000. #Fitted_point
   0.00248    1000000   425.1      0.   0.00010    179000. #Fitted_point
#
#