# #Copyright (C) 2012 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 # saedigcurve_v2.2.f starts. # # Note: Fitted Curve !! # SAE1028/SAE1030 Steel. from 3/4inch rod. # Outside and Core metallurgy differ. Outside is SAE1020, # Core is approx. SAE1028 to SAE1030. Specim. test section mostly core # Core hardness Rb= 73. Chem: 0.28C wt% 0.50Mn .008Ph .010S .010Si .006Al # .04Cr .03Ni # Ref.: J. Martin, "Cyclic Stress-Strain Behavior and Fatigue Resistance of # Two Structural Steels," Frac. Control Program, FCP rep. 9, Oct. 1973. # Material cyclically softens at strain amplitudes below 0.0033, and hardens # cyclically above. # #FileType= strain_life #DataType= fitted #TIMEcol= 0 #NAME= SAE1028 #NAME= SAE1030 #NAME= Steel #Stress_units= mpa #Strain_units= strain #Sy= 290. 0.2pc offset, 42 ksi #Su= 451. mpa 66 ksi #eu= 0.17 #strain at Ultimate Su #E= 206900 mpa = 30000 ksi #FractureStrain= 0.90 #FractureStress= 883 map, 128ksi, 111ksi(Bridgeman) #monotonic_K= 0 See report #monotonic_n= 0 See report #BHN= 421. Rb=73 #%RA= 59. % #StrAmpl 2Nf StsAmpl So PlasStrAmpl IniMod NeuberStressAmpl # #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. 0.90 1 883. 0 0.896 206900 #Fitted_point monotonic 0.01434 500 413.3 0. 0.01235 206900. #Fitted_point 0.01113 1000 381.9 0. 0.00928 206900. #Fitted_point 0.00869 2000 353.0 0. 0.00698 206900. #Fitted_point 0.00633 5000 318.0 0. 0.00479 206900. #Fitted_point 0.00503 10000 293.9 0. 0.00361 206900. #Fitted_point 0.00403 20000 271.6 0. 0.00271 206900. #Fitted_point 0.00305 50000 244.8 0. 0.00186 206900. #Fitted_point 0.00250 100000 226.3 0. 0.00140 206900. #Fitted_point 0.00207 200000 209.2 0. 0.00106 206900. #Fitted_point 0.00164 500000 188.6 0. 0.00073 206900. #Fitted_point 0.00139 1000000 174.4 0. 0.00055 206900. #Fitted_point 0.00119 2000000 161.3 0. 0.00041 206900. #Fitted_point 0.00099 5000000 145.6 0. 0.00029 206900. #Fitted_point #Last data here 0.00087 10000000 134.7 0. 0.00022 206900. #Fitted_point #extrapolation # #