#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!! : All tests in this file have mean stress: # Equivalent computed SeqAmpl= sqrt(Smax * Sampl) # 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= raw #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 ) # #StrAmp 2NF StsAmp MeanS PlasStr EMod. ## #Data below is from Mean Stress tests Smax 1200mpa ## The stress ampl.(3rd column) is an EquivStsAmpl ## = Sqrt(Smax*Sa) 0.00285 68000 847 602 0.00000 209000 0.0026 945120 808 656.5 0.00000 209000 0.00245 5604 783 689 0.00000 209000 0.0022 11240 739 745.5 0.00000 209000 0.002 135992 706 784.5 0.00000 209000 0.0017 13052 650 848 0.00000 209000 0.00155 28128 622 878 0.00000 209000 0.0015 2152532 609 890.5 0.00000 209000 # #