#Copyright (C) 2011 F.D.E. Committee and N.E.Dowling #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 # # SAE 4340 HeatTreated Steel Su=785mpa, Specimens cut from 7.5in. diam. Forged # bar in longt. dir., Austenitized at 1560F held for 3 hrs, Oil Quenched., # Temper at 1225F 8 hrs, air cooled.Heat 61738 # Some specimens tested in Stroke control while monitored strain and load. # Ref.: N.E. Dowling, private communication. # See also: N.E.Dowling,"Notched Member Fatigue Life Prediction Combining # Crack Initiation and Propagation," Fatigue of Engineering Materials and # Structures, V2, N2, 1979, pp.129-138. # N.E. Dowling, "Fatigue at Notches and the Local Strain and Fracture # Mechanics Approaches,"ASTM STP 677, pp. 247-273, 1979. # #FileType= strain_life #DataType= raw #TIMEcol= 0 #NAME= SAE4340 #NAME= HeatTreated #NAME= Steel #Stress_units= mpa #Strain_units= strain #Sy= 648. 0.2pc offset #Su= 785. #eu= 0 #strain at Su not reported #E= 206700. #FractureStrain= 1.14 #computed from %RA #FractureStress= 1550. #BHN= 193. #%RA= 68 % #StrAmpl 2Nf StsAmpl So PlasStrAmpl IniMod NeuberStressAmpl 0.01530 824 631 0 0.01225 206700 1413 0.00884 4128 535 0 0.00625 206700 988 0.00539 11900 480 0 0.00307 206700 731 0.00274 72000 420 0 0.00071 206700 488 0.00188 636000 389 0 0. 206700 388 0.00197 1944000 411 0 0. 206700 409 0.02640 250 713 0 0.02295 206700 1973 0.02650 244 703 0 0.02310 206700 1962 0.01450 1136 628 0 0.01146 206700 1372 0.00885 3200 562 0 0.00613 206700 1014 0.00528 10500 491 0 0.00290 206700 732 0.00515 9370 496 0 0.00275 206700 727 0.00337 34000 452 0 0.00118 206700 561 0.00335 35000 456 0 0.00114 206700 562 0.00330 35600 447 0 0.00114 206700 552 0.00253 97200 439 0 0.00041 206700 479 0.00235 178000 445 0 0.00020 206700 465 0.00204 456000 432 0 0. 206700 427 0.00210 876000 429 0 0.00003 206700 431 0.00181 818000 390 0 0.0 206700 382 0.00185 424000 393 0 0.0 206700 388 #Points not used (no life rept.) #0.00884 0 557 0 0.00614 206700 1009 #0.02550 0 699 0 0.02212 206700 1920 #0.00505 0 483 0 0.00271 206700 710 #0.00235 0 442 0 0.00021 206700 463 #0.01465 0 633 0 0.01159 206700 1384 #0.00905 0 561 0 0.00634 206700 1025 # #