# #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 !!! # SAE9255 HRc=50 Su=1750mpa avg. Inland: Spring Steel # Austenitized 900C 30min, Quenched in oil, tempered 400C 45min # 0.58C wt% .81Mn .02P .0111S .88Si .5Cr .03Al # Ref.: B.Yan, "Fatigue Behavior of a Microalloyed Steel Under Uniaxial # Loading", SAE Paper No. 930967, SAE Congress, Detroit, March1-5, 1993. # Also includes Stress vs Nf test data from S.P. Baht. # Assumed one long life point to be a runout. FAC # Data digitized from graphs(with difficulty) and may contain errors. # #FileType= strain_life #DataType= fitted #TIMEcol= 0 #NAME= SAE9259 #NAME= SpringSteel #NAME= Inland #Stress_units= mpa #Strain_units= strain #Sy= 1560. 0.2pc offset average of 1657 and 1483 2 batches #Su= 1750. Avg. of 1815 and 1693 (2 batches) #eu= 0 #strain at Su not reported #E= 200000. Not reported. Calc. from cyclic stress-strain plot #FractureStrain= 0.39 #computed from %RA #FractureStress= 3550. #from elast Strain at 2Nf=1 #monotonic_K= 0 not reported #monotonic_n= 0 not reported #BHN= 475. not reported #%RA= 32.2 % #saedigcurve_v2.2.f starts. #No. original test data fatigue data points= 46 # # 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 0.39 1 3550. 0 0.37 200000. #Fitted_point monotonic test 0.01567 500 1323.0 0. 0.00906 200000. #Fitted_point 0.01144 1000 1252.3 0. 0.00518 200000. #Fitted_point 0.00886 2000 1184.4 0. 0.00293 200000. #Fitted_point 0.00685 5000 1098.0 0. 0.00136 200000. #Fitted_point 0.00591 10000 1034.5 0. 0.00074 200000. #Fitted_point 0.00526 20000 972.4 0. 0.00039 200000. #Fitted_point 0.00464 50000 893.8 0. 0.00017 200000. #Fitted_point 0.00428 100000 837.9 0. 0.00009 200000. #Fitted_point 0.00397 200000 785.7 0. 0.00004 200000. #Fitted_point 0.00363 500000 722.3 0. 0.00002 200000. #Fitted_point 0.00340 1000000 678.2 0. 0.00001 200000. #Fitted_point 0.00319 2000000 637.2 0. 0.00001 200000. #Fitted_point 0.00294 5000000 587.1 0. 0.00000 200000. #Fitted_point 0.00294 10000000 587.1 0. 0.00000 200000. #Fitted_point manually #