#
# NOTE! Fitted Curve. AISI 4130 ALLOY STEEL, # 1600F (1/2hour in salt),WATER Q +Tempered AT 750F 1hr in salt, air cooled, # Diametral (hourglass) specim. LONGITUDINAL to wrought bar stock. # SMITH ET AL, NASA TN D1574, 1963 BHN 362/371 # saedigcurve_v2.2.f starts. # #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 # #Fn= 87 SteelHeatTreated #FileType= strain_life #DataType= fitted #TIMEcol= 0 #NAME= SAE4130_Steel #Stress_units= ksi #Strain_units= strain #Su= 206.90 #Sy= 196.90 #E= 28979. #%RA= 54.7 #BHN= 366. #NO. FAT. PTS.= 14 # SAE4130_St BHN= 366 Fn= 87 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 28979. KSI, 200. GPA K' = 246.1 KSI, 1696.MPA #YIELD,0.2%= 197. KSI, 1358. MPA N' = 0.1137 #ULT. STRG.= 207. KSI, 1427. MPA F. STRG COEF= 240.0 KSI, 1655.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0764 #N = 0.0000 FAT DUCT COEF= 0.8028 #RED. IN AREA = 54.7 F.DUCT EXP, c=-0.6715 #T. FRAC. STG.= 0.0 KSI, 0. MPA Exp Cyc Yld = 121. Ksi, 837.MPA #T. FRAC. STR.= 0.000 Fit Cyc Yld = 118. Ksi, 813.MPA #No. fatigue data points= 14 # # NOTE!! The Following Points are FITTED DATA:#NOTE!! Fitted Stress computed using Experm. K' and n' #Stress_Units= KSI # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. 0.81104 1 247.4 0. 0.80251 28979. #Fitted_point 0.51187 2 233.5 0. 0.50381 28979. #Fitted_point 0.27973 5 216.4 0. 0.27226 28979. #Fitted_point 0.17798 10 204.3 0. 0.17092 28979. #Fitted_point 0.11397 20 192.9 0. 0.10731 28979. #Fitted_point 0.06418 50 178.8 0. 0.05801 28979. #Fitted_point 0.04226 100 168.8 0. 0.03644 28979. #Fitted_point 0.02840 200 159.4 0. 0.02290 28979. #Fitted_point 0.01752 500 147.8 0. 0.01242 28979. #Fitted_point 0.01265 1000 139.6 0. 0.00783 28979. #Fitted_point 0.00951 2000 131.9 0. 0.00496 28979. #Fitted_point 0.00696 5000 122.5 0. 0.00273 28979. #Fitted_point 0.00575 10000 116.0 0. 0.00175 28979. #Fitted_point 0.00493 20000 109.9 0. 0.00113 28979. #Fitted_point 0.00419 50000 102.6 0. 0.00065 28979. #Fitted_point 0.00379 100000 97.5 0. 0.00043 28979. #Fitted_point 0.00348 200000 92.7 0. 0.00028 28979. #Fitted_point 0.00316 500000 86.7 0. 0.00017 28979. #Fitted_point 0.00296 1000000 82.5 0. 0.00011 28979. #Fitted_point 0.00278 2000000 78.5 0. 0.00007 28979. #Fitted_point 0.00258 5000000 73.4 0. 0.00004 28979. #Fitted_point 0.00243 10000000 69.7 0. 0.00003 28979. #Fitted_point 0.00230 20000000 66.2 0. 0.00002 28979. #Fitted_point 0.00214 50000000 61.8 0. 0.00001 28979. #Fitted_point 0.00203 100000000 58.7 0. 0.00001 28979. #Fitted_point 0.00193 200000000 55.7 0. 0.00000 28979. #Fitted_point 0.00180 500000000 51.9 0. 0.00000 28979. #Fitted_point 0.00170 1000000000 49.3 0. 0.00000 28979. #Fitted_point # #