# # Fitted data Curve! # oc-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 # # Str_Ampl, 2Nf, Sts_Amp_mpa, MeanSts, PlsStrAmp, InitialMod. .0173 164. .0041 45.8 .00329 38.3 .00288 33.9 .00235 28.9 .00198 24.6 .00154 20.0 .00122 16.5 .00085 12. .0006 8.5 0 0