# #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 # # NOTE Fitted Data !! # B80RK steel from 0.052inch sheet, Bethlehem Steel # Aluminum Killed, Cold-rolled, Stress-Relief Anneal, Skin-pass. # Probably qualifies for HSLA-80 or HSLA550(metric) # Ref.: G.A.Miller and H.S.Reemsnyder, "Strain-Cycle Fatigue of Sheet and # Plate Steels I: Test Method Development and Data Presentation," # SAE Paper 830175, Detroit MI, Feb28-Mar.4, 1983. More details about # steel available from one of paper's authors at: www.hsreemsnyder.com # Data digitized by F.D.+E. from graphs and may contain errors. # #FileType= strain_life #DataType= fitted #TIMEcol= 0 #NAME= B80RKsteel #NAME= HSLA550 #NAME= ColdRolled #Stress_units= ksi #Strain_units= strain #Sy= 81.5 0.2pc offset X 6.89 = 562 mpa #Su= 88.5 = 610 mpa #eu= 0 #strain at Su not reported #E= 29500. #FractureStrain= 0 #FractureStress= 0. #monotonic_K= 0 #monotonic_n= 0 #BHN= 0. #%RA= 0 % #saedigcurve_v2.2.f starts. #NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' #StrAmpl 2Nf StsAmpl So PlasStrAmpl IniMod NeuberStressAmpl 0.81601 1 103.6 0. 0.81250 29500. #Fitted_point 0.01029 2000 66.7 0. 0.00803 29500. #Fitted_point 0.00675 5000 63.3 0. 0.00460 29500. #Fitted_point 0.00508 10000 60.8 0. 0.00302 29500. #Fitted_point 0.00396 20000 58.4 0. 0.00198 29500. #Fitted_point 0.00301 50000 55.4 0. 0.00113 29500. #Fitted_point 0.00255 100000 53.2 0. 0.00074 29500. #Fitted_point 0.00222 200000 51.1 0. 0.00049 29500. #Fitted_point 0.00192 500000 48.4 0. 0.00028 29500. #Fitted_point 0.00176 1000000 46.5 0. 0.00018 29500. #Fitted_point 0.00163 2000000 44.6 0. 0.00012 29500. #Fitted_point 0.00150 5000000 42.3 0. 0.00007 29500. #Fitted_point #Original test data ends at about 2Nf= 3M revs. Thus extrapolation: 0.00142 10000000 40.6 0. 0.00004 29500. #Fitted_point 0.00135 20000000 39.0 0. 0.00003 29500. #Fitted_point #