#SAE Standard Data File # All of the data below was derived, but not copied, from the NASA Tech. # Note D-1574.The derivations and additions have been made by the members # of the FD&E committee of the SAE. Thus: # # Copyright (C) 1999 Fatigue Design & Evaluation Committee of the SAE. # 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 # #Ford= 37 # AISI 4340 ALLOY Steel # 1520F 1/2 hr in salt, Water QUenched & Tempered at 800F in salt,air cooled # SMITH, HIRSHBERG, MANSON, NASA TN D-1574, APR 1963, # Hourglass Diametral specimens # Rc=44 = BHN=409, LONGITUDINAL # #FileType= strain_life #DataType= fitted #TIMEcol= 0 #NAME= SAE4340 #UNITS= KSI #Stress_units= ksi #Su= 212.90 #Sy= 198.90 #E= 28979. #%RA= 38.1 #BHN= 409. #NO. FAT. PTS.= 14 #Tot Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. # SAE4340 BHN= 409 Fn= 37 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 28979. KSI, 200. GPA K' = 289.5 KSI, 1996.MPA #YIELD,0.2%= 199. KSI, 1371. MPA N' = 0.1352 #ULT. STRG.= 213. KSI, 1468. MPA F. STRG COEF= 272.5 KSI, 1879.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0859 #N = 0.0000 FAT DUCT COEF= 0.6401 #RED. IN AREA = 38.1 F.DUCT EXP, c=-0.6355 #T. FRAC. STG.= 0.0 KSI, 0. MPA Exp Cyc Yld = 125. Ksi, 862.MPA #T. FRAC. STR.= 0.000 Fit Cyc Yld = 129. Ksi, 888.MPA #No. fatigue data points= 14 # # NOTE!! The Following Points are <b>FITTED DATA:</b> #UNITS= KSI #Stress_Units= KSI # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. 0.64954 1 272.5 0. 0.64014 28979. #Fitted_point 0.42092 2 256.8 0. 0.41206 28979. #Fitted_point 0.23836 5 237.3 0. 0.23017 28979. #Fitted_point 0.15588 10 223.6 0. 0.14816 28979. #Fitted_point 0.10264 20 210.7 0. 0.09537 28979. #Fitted_point 0.05999 50 194.7 0. 0.05327 28979. #Fitted_point 0.04062 100 183.5 0. 0.03429 28979. #Fitted_point 0.02804 200 172.9 0. 0.02207 28979. #Fitted_point 0.01784 500 159.8 0. 0.01233 28979. #Fitted_point 0.01313 1000 150.5 0. 0.00794 28979. #Fitted_point 0.01000 2000 141.8 0. 0.00511 28979. #Fitted_point 0.00738 5000 131.1 0. 0.00285 28979. #Fitted_point 0.00610 10000 123.5 0. 0.00184 28979. #Fitted_point 0.00520 20000 116.4 0. 0.00118 28979. #Fitted_point 0.00437 50000 107.6 0. 0.00066 28979. #Fitted_point 0.00392 100000 101.4 0. 0.00043 28979. #Fitted_point 0.00357 200000 95.5 0. 0.00027 28979. #Fitted_point 0.00320 500000 88.3 0. 0.00015 28979. #Fitted_point 0.00297 1000000 83.2 0. 0.00010 28979. #Fitted_point 0.00277 2000000 78.4 0. 0.00006 28979. #Fitted_point 0.00253 5000000 72.4 0. 0.00004 28979. #Fitted_point 0.00238 10000000 68.2 0. 0.00002 28979. #Fitted_point 0.00223 20000000 64.3 0. 0.00001 28979. #Fitted_point 0.00206 50000000 59.4 0. 0.00001 28979. #Fitted_point 0.00194 100000000 56.0 0. 0.00001 28979. #Fitted_point 0.00182 200000000 52.8 0. 0.00000 28979. #Fitted_point 0.00168 500000000 48.8 0. 0.00000 28979. #Fitted_point 0.00159 1000000000 45.9 0. 0.00000 28979. #Fitted_point #