#Use for cyclic stress-strain only
#Owens Corning SMC-R50 Sheet
#Sheet molding compound w. 50% chopped glass
#randomly orientated in the plane of sheet.
#E-glasss 25mm fiber    Isophthalic Polyester resin 
#Calcium carbonate filler.
#"The Mechanical Properties of an SMC-R50 Composite" 
# D.L.Denton ed.  Owens-Corning Fiberglass Corp. 1979.
#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= 0.015 strain # Ultimate strain = fracture
#true_fracture_strain= 0.015 
#true_fracture_stress= 164. mpa
#Sequiv= sqrt( Smax * Sa )
#Use plot of secant modulus to get 1/2 Life StrainAmp:
#Strain_Amp = Sa / Es                  
#Sneuber = sqrt (Smax * Strain_Ampl * E)
# Nf  Smax_mpa Smin_mpa Sa_mpa  Seuiv_mpa   Es at Nf/2   Strain_Ampl
   11360   100   8.4   45.8   67.7   11700   0.00391
   10000   100   8.4   45.8   67.7   11400   0.00402
   11295   100   8.4   45.8   67.7   11000   0.00416
    6520   100   8.4   45.8   67.7   10600   0.00432
    8905   100   8.4   45.8   67.7   12400   0.00369
                  
   30105   85   8.4   38.3   57.1   11300   0.00339
   78905   85   8.4   38.3   57.1   12100   0.00317
  557975   67   8.4   29.3   44.3   11800   0.00248
  320145   67   8.4   29.3   44.3   12400   0.00236
  457160   67   8.4   29.3   44.3   11700   0.00250
  358320   67   8.4   29.3   44.3   12000   0.00244
10000000   65   8.4   28.3   42.9   12200   0.00232  #runout
10000000   64   8.4   27.8   42.2   13200   0.00211  #runout
3425000   64   8.4   27.8   42.2   12400   0.00224  #runout
12500000   59   8.4   25.3   38.6   12700   0.00199  #runout
10309330   50   8.4   20.8   32.2   13700   0.00152  #runout
#
#1   43.4   8.4   17.5    27.6   15400   0.00114  #runout
#1   43.4   8.4   17.5    27.6   14500   0.00121  #runout
#1   33.5   8.4   12.55   20.5   14800   0.00085  #runout
#1   33.5   8.4   12.55   20.5   15100   0.00083  #runout
#1   25     8.4   8.3     14.4   17000   0.00049  #runout