# #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! # DP590 Dual Phase Steel, from 2mm sheet, # Chem.: 0.09wt% 1.01Mn .01P .01S .28Si Cu, Ni, Mo lt .02, .0Cr .04Al # .01Sn .01N # Monotonic Tension curve is close to the cyclic curve. # 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= DP590steel #Name= DualPhase #Stress_units= mpa #Strain_units= strain #E= 209000 #Sy= 349. #Su= 523. (appears to be a bit low. Should be 590) #eu= 0.17 engineering (estimated from %Elongation) #%RA= 53. #FractureStress= 643. #FractureStrain= 0.76 #%Elongation= 34 (over 10mm) #monotonic_K= 730 #monotonic_n= 0.12 #BHN= 171 (HRc=6 measured) # #saedigcurve_v2.2.f starts. #The traditional curve fit is not great. Adjustments made manually to 2Nf below #NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' #StrAmp 2NF StsAmp MeanS PlasStr EMod. 0.76 1 643 0. 0.757 209000. #Fitted_point monotonic 0.01030 2200 426.1 0. 0.00826 209000. #Fitted_point manually 0.00846 3700 409.8 0. 0.00650 209000. #Fitted_point manually 0.00659 7800 389.2 0. 0.00473 209000. #Fitted_point manually 0.00551 12000 374.3 0. 0.00372 209000. #Fitted_point manually 0.00464 22000 359.9 0. 0.00292 209000. #Fitted_point manually 0.00375 50000 341.6 0. 0.00212 209000. #Fitted_point manually 0.00323 90000 328.4 0. 0.00166 209000. #Fitted_point manually 0.00281 110000 315.6 0. 0.00130 209000. #Fitted_point manually 0.00237 180000 299.3 0. 0.00094 209000. #Fitted_point manually 0.00211 500000 288 0. 0.00073 209000. #Fitted_point manually #The fatigue curve goes flat here but plastic strains are still present. #This can cause problems in stress-strain models. Thus we will use #some of the actual raw points below. 0.00189 1500000 281 0. 0.00057 209000. #Fitted_point manually 0.00184 3000000 280 0 0.00049 209000 #Fitted_point manually 0.00182 10100418 279 0 0.00049 209000 #raw #runout 0.00182 15000000 279 0 0.00049 209000 #raw + changed life # #