# #Copyright (C) 2011 Fatigue Design and Evaluation Comm. #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 !! # SAE 1018 Normalized, Transverse Specimens, tested in Oil # Specimens machined from 3.5 inch normalized forged billet. # 0.18C wt% .006P .028S .50Mn .04Si .036Cu .036Cr .008Sn .025Ni .01Mo .03Co # Hardnes Rb= 48.5, Vickes(30kg)= 101 # Sources: The data points were derived from graphs in the paper: # D.G.Havard and T.H.Topper, "Low-Cycle Biaxial Fatigue of AISI 1018 Steel," # Ontario Hydro Res. Quaterly, 2nd Q. 1969, pp.1-12. # Note: Data may contain errors from digitization process. # Note: Test data does not go beyond 2Nf=300000. # #FileType= strain_life #DataType= fitted #TIMEcol= 0 #NAME= SAE1018steel #NAME= Normalized #NAME= test_in_oil #Name= Transverse #Stress_units= mpa #Strain_units= strain #Su= 436. mpa #Sy= 234. mpa #E= 206700. #Modulus not reported. Assumed=30000ksi #FractureStrain= 0.772 #FractureStress= 944. #BHN= 82 HV-30kg= 101, HRb=48.5 #%RA= 53.8 #Elongation= 63.7 (3/8 inch G.L.) # saedigcurve_v2.2.f starts. # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. .772 1 944. 0. .740 206700. #Fitted_point tensile test 0.01495 1000 367.4 0. 0.01317 206700. #Fitted_point 0.01062 2000 332.8 0. 0.00901 206700. #Fitted_point 0.00687 5000 291.9 0. 0.00546 206700. #Fitted_point 0.00501 10000 264.3 0. 0.00373 206700. #Fitted_point 0.00371 20000 239.3 0. 0.00255 206700. #Fitted_point 0.00256 50000 209.8 0. 0.00154 206700. #Fitted_point 0.00197 100000 189.9 0. 0.00105 206700. #Fitted_point 0.00172 303073 177 0 0.00087 206700 251 #test data point #