# # Fitted Curve. Fatigue limit adjusted manually FAC Jun09 # AISI 4142, QIL QUENCHED + DEFORMED 650F LANDGRAF T+AM R 320, 1968, # LONGITUDINAL to rolling direction # 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 #Name= AlloySteel #NAME= BHN_450 #Fn= 45 # #FileType= strain_life #DataType= fitted #TIMEcol= 0 #Stress_units= ksi #Strain_units= strain #Su= 279.80 #Sy= 269.80 #E= 29700. (corrected June2009) Original was=28979. ksi #Elast mod above increased slightly to "hit" long life points on #cyclic stress-strain curve. #%RA= 37.0 #BHN= 450. #NO. FAT. PTS.= 9 # SAE4142 AlloySteel BHN= 450 Fn= 45 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 29700. KSI, 205. GPA K' = 283.9 KSI, 1957.MPA #YIELD,0.2%= 270. KSI, 1860. MPA N' = 0.0881 #ULT. STRG.= 280. KSI, 1929. MPA F. STRG COEF= 309.0 KSI, 2131.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0856 #N = 0.0000 FAT DUCT COEF= 2.6204 #RED. IN AREA = 37.0 F.DUCT EXP, c=-0.9716 #T. FRAC. STG.= 0.0 KSI, 0. MPA Exp Cyc Yld = 164. Ksi,1132.MPA #T. FRAC. STR.= 0.000 Fit Cyc Yld = 155. Ksi,1068.MPA #No. fatigue data points= 9 # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' # NOTE!! Adjusted fatigue limit points manually. FAC Jun09 #Stress_Units= KSI # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. 2.63076 1 279.2 0. 2.62136 29700. #Fitted_point 1.34600 2 264.2 0. 1.33710 29700. #Fitted_point 0.55761 5 245.6 0. 0.54934 29700. #Fitted_point 0.28826 10 232.4 0. 0.28044 29700. #Fitted_point 0.15069 20 220.0 0. 0.14328 29700. #Fitted_point 0.06600 50 204.6 0. 0.05911 29700. #Fitted_point 0.03687 100 193.7 0. 0.03035 29700. #Fitted_point 0.02184 200 183.4 0. 0.01566 29700. #Fitted_point 0.01236 500 170.9 0. 0.00661 29700. #Fitted_point 0.00895 1000 162.1 0. 0.00349 29700. #Fitted_point 0.00705 2000 154.0 0. 0.00187 29700. #Fitted_point 0.00569 5000 144.2 0. 0.00083 29700. #Fitted_point 0.00507 10000 137.1 0. 0.00045 29700. #Fitted_point 0.00463 20000 130.3 0. 0.00024 29700. #Fitted_point 0.00419 50000 121.4 0. 0.00010 29700. #Fitted_point 0.00392 100000 114.9 0. 0.00005 29700. #Fitted_point 0.00368 200000 108.5 0. 0.00003 29700. #Fitted_point 0.003500 1000000. 104.86 0. 0.0 28979 #Fitted_point (last data) 0.003500 10000000. 104.86 0. 0.0 28979 #Fitted_point manually #