# # Fitted Curve: Fatigue limit adjusted manually # AISI 4142 Q + T AT 840F, Longitudinal to direc. of rolling # LANDGRAF, T+AM 320, 1968, BHN 380 # saedigcurve_v2.2.f starts. # Copyright (C) 2000 R.W. Landgraf # 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 MERCHANTA- # BILITY 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 # #NAME= SAE4142_Steel #Fn= 82 #FileType= strain_life #DataType= fitted #TIMEcol= 0 #Stress_units= ksi #Strain_units= strain #Su= 204.90 #Sy= 199.90 #E= 29979. #%RA= 48.0 #BHN= 380. #NO. FAT. PTS.= 8 # SAE4142_St BHN= 380 Fn= 82 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 29979. KSI, 207. GPA K' = 328.7 KSI, 2266.MPA #YIELD,0.2%= 200. KSI, 1378. MPA N' = 0.1241 #ULT. STRG.= 205. KSI, 1413. MPA F. STRG COEF= 310.8 KSI, 2143.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0944 #N = 0.0000 FAT DUCT COEF= 0.6366 #RED. IN AREA = 48.0 F.DUCT EXP, c=-0.7606 #T. FRAC. STG.= 0.0 KSI, 0. MPA Exp Cyc Yld = 152. Ksi,1048.MPA #T. FRAC. STR.= 0.000 Fit Cyc Yld = 140. Ksi, 968.MPA #No. fatigue data points= 8 # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' # NOTE!! Fatigue limit points adjusted manually. FAC Jun09 #Stress_Units= KSI # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. 0.64698 1 302.2 0. 0.63690 29979. #Fitted_point 0.38546 2 281.8 0. 0.37606 29979. #Fitted_point 0.19607 5 256.9 0. 0.18750 29979. #Fitted_point 0.11881 10 239.5 0. 0.11082 29979. #Fitted_point 0.07302 20 223.3 0. 0.06557 29979. #Fitted_point 0.03964 50 203.7 0. 0.03285 29979. #Fitted_point 0.02588 100 190.1 0. 0.01954 29979. #Fitted_point 0.01760 200 177.5 0. 0.01168 29979. #Fitted_point 0.01140 500 162.4 0. 0.00598 29979. #Fitted_point 0.00873 1000 152.1 0. 0.00365 29979. #Fitted_point 0.00702 2000 142.7 0. 0.00226 29979. #Fitted_point 0.00562 5000 131.6 0. 0.00123 29979. #Fitted_point 0.005200 5300 126. 0. 0.000997 29979. #Fitted_point manually 0.004000 15700. 119.95 0. 0.000000 29979. #Fitted_point also real 0.003300 42700. 99.93 0. 0.000000 29979. #Fitted_point also real 0.003000 1720000. 89.92 0. 0.000000 29979. #Fitted_point also real 0.003000 10000000. 89.92 0. 0.000000 29979. #Fitted_point manually #