# # Fitted Curve ! (median data line) # AISI SAE 1090 merged file of iter007, iter008, iter009 iter010 # #saedigcurve_v2.2.f starts. #FileType= strain_life #DataType= fitted #Name= SAE1090 #Name= AisiMerged #Name= Steel #Stress_units= MPa #Strain_units= strain #Sy= 813 #(average of 4 files) #Su= 1228 #(average of 4 files) #E= 214000. #average #FractureStrain= .28 (average: .2 .3 .1 .5 ) #FractureStress= 1140. (avg.: 1151 1427 1169 840) #FailureDef= 50% load drop #BHN= 304 # average # # SAE1090 AisiMerged BHN= 304 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 31038. KSI, 214. GPA K' = 313.6 KSI, 2162.MPA #YIELD,0.2%= 118. KSI, 813. MPA N' = 0.1938 #ULT. STRG.= 178. KSI, 1228. MPA F. STRG COEF= 275.5 KSI, 1899.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.1128 #N = 0.0000 FAT DUCT COEF= 0.5124 #RED. IN AREA = 0.0 F.DUCT EXP, c=-0.5822 #T. FRAC. STG.= 165.3 KSI, 1140. MPA Exp Cyc Yld = 94. Ksi, 649.MPA #T. FRAC. STR.= 0.280 Fit Cyc Yld = 93. Ksi, 644.MPA #No. fatigue data points= 79 # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' # NOTE!! Short life and Fatigue limit fitted manually. FAC Jul-09 #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. .28 1 1140 0. .2748 214000. #Fitted_point manually 0.00990 2000 790.7 0. 0.00621 214000. #Fitted_point 0.00699 5000 717.8 0. 0.00364 214000. #Fitted_point 0.00554 10000 667.0 0. 0.00243 214000. #Fitted_point 0.00451 20000 619.5 0. 0.00161 214000. #Fitted_point 0.00356 50000 561.4 0. 0.00094 214000. #Fitted_point 0.00305 100000 520.6 0. 0.00062 214000. #Fitted_point 0.00266 200000 482.3 0. 0.00041 214000. #Fitted_point 0.00227 500000 435.5 0. 0.00023 214000. #Fitted_point 0.00203 1000000 402.8 0. 0.00015 214000. #Fitted_point 0.00203 10000000 402.8 0. 0.00015 214000. #Fitted_point manually #