# #FileType= strain_life #DataType= fitted #TIMEcol= 0 #Name= SMC-R50_Fitted #Name= polymer_composite #Name= medianCurve # #Copyright (C) 2011 Fatigue Design and Evaluation Comm. #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 #licenseor (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 notwrite to the Free Software #FoundationInc.59 Temple Place - Suite 330BostonMA 02111-1307USA #Try also their web site: http://www.gnu.org/copyleft/gpl.html # # Fitted median data Curve! # smc-R50CyclicSS_fitted.txt Isophthalic Polyester resin # Owens Corning SMC-R50 Sheet 12x18x0.10 inch sheets # Sheet molding compound w. 50% chopped 25mm E-glass fibers # randomly orientated in plane of sheet.Calcium carbonate filler. # Ref.: "The Mechanical Properties of an SMC-R50 Composite" # D.L.Denton ed. Owens-Corning Fiberglass Corp. 1979. # Data digitized manually from plots in Ref. # #_E= 15600 mpa (Initial tensile modulus 23degC ) #Note: E modulus is a function of cycles #E= 13000 mpa (assumed cyclic modulus) #Su= 164 mpa #eu= 0.0173 strain # Ultimate strain = fracture #true_fracture_strain= 0.0173 #true_fracture_stress= 164. mpa #Use Ref.'s plot of secant modulus to get 1/2 Life StrainAmp: #Strain_Amp = Sa / Es at Nf/2 # #Stress_units= mpa #Strain_units= strain ##Str_Ampl 2Nf Sts_Amp_mpa MeanSts PlsStrAmp InitialMod. 0.0173 2 164 0 0 13000 0.01 200 98.7 0 0 13000 0.006 12900 63 0 0 13000 0.0041 237000 45.8 0 0 13000 0.0038 984000 43 0 0 13000 0.00339 2000000 39.2 0 0 13000 0.00329 2880000 38.3 0 0 13000 0.00329 20000000 38.3 0 0 13000 #