# #Copyright (C) 2015 Fatigue Design+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 Points/Curve of Periodic overloaded test data # AISI-8822 Thru Carburized Steel, Note!! This steel has no plasticiy # Specimens were cut from 20mm rod stock and thru carburized at 927C # in atmosphere with 0.90% carbon potential. Then Quenched in 66C oil, # and tempered at 218C. Polished up to 600 emery paper. # Chem.(before Thru Carburized): 0.22C 0.86Mn .013P .025S .17Si .43Ni # .39Mo .54Cr .24Cb .004V .028Al .01Sn # Ref.: Maria El Zeghayar, "The Introduction of Crack Opening Stress # Modeling into Strain-Life And Small Crack Growth Fatigue Analysis," # Dept. Civil Engr. Univ. of Waterloo, 2010. #FileType= strain_life #DataType= fitted #TimeCol= 0 #Name= AISI8822 #Name= Steel #Name= ThruCarburized #Stress_units= mpa #Strain_units= strain #E= 209000 #Sy= 1480. #Su= 1480. Note!! Steel has no plasticity #eu= 0.0087 #%RA= 0. #FractureStress= 1480. #FractureStrain= 0.0087 #BHN= 654 (HRc= 60 measured ) # # #saedigcurve_v2.2.f starts. #NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' #StrAmp 2NF StsAmp MeanS PlasStr EMod. NeubEqvStsAmpl 0.0087 1 1480. 0. 0. 209000 #monotonic 0.00494 500 980.1 0. 0.00025 209000. #Fitted_point manually 0.00445 2200 895.9 0. 0.00016 209000. #Fitted_point manually 0.00401 4000 815.9 0. 0.00010 209000. #Fitted_point manually 0.00349 9500 717.9 0. 0.00006 209000. #Fitted_point manually 0.00315 15000 650.1 0. 0.00004 209000. #Fitted_point manually 0.00283 20000 587.8 0. 0.00002 209000. #Fitted_point manually 0.00247 30000 513.7 0. 0.00001 209000. #Fitted_point manually 0.00223 40000 463.6 0. 0.00001 209000. #Fitted_point manually 0.00201 60000 418.2 0. 0.00000 209000. #Fitted_point manually 0.00175 100000 364.8 0. 0.00000 209000. #Fitted_point manually 0.00158 900000 328.9 0. 0.00000 209000. #Fitted_point manually 0.00158 10000000 328.9 0. 0.00000 209000. #Fitted_point manually #