SAE Standard Data File: SMC-R50 OwensCorning Composite

#SAE Standard Data File: SMC-R50 OwensCorning Composite # #

Pick one: #FDE_plot #FDE_fit #
#Note: This file will not process for Coffin-Manson fit
#

#<pre>
#
#FileType= strain_life
#DataType= fitted
#TIMEcol= 0
#Name= SMC-R50_Fitted
#Name= polymer_composite
#Name= medianCurve_93C
#
#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!
# OwensCorning SMC-R50 Short fiber composite     93deg.C
#oc-smc-R50CyclicSS_93C_fitted.txt
# Tested at 93deg.C 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= 11900 mpa (Initial tensile modulus Reported 93degC )
#Note! in fatigue tests modulii average initial E=13100. Thus use:
#E= 13000.  mpa  half life fatigue modulus
#Note: E modulus is a function of cycles
#Su= 129 mpa  at 93C
#eu= 0.0173   strain # Ultimate strain = fracture
#true_fracture_strain= 0.0173
#true_fracture_stress= 129. mpa
#Use Ref.'s plot of secant modulus to get 1/2 Life StrainAmp:
#Strain_Amp = Sa / Es  at Nf/2
#Points fitted from cyclic s-s by hand.
#Life points read from Neuber SequivAmpl vs Nf plot
#Sneuber= sqrt(Sa * StrAmpl * E) where E=13000
#Stress_units= mpa
#Strain_units= strain
#strainAmpl  2Nf   StsAmpl  So  PlsStrAmp IniModulus      Sneuber   log(Sneuber)
0.0157            2    129     0        0    13000    #      162.2618    2.2102
0.00367       50237    41      0        0    13000    #       44.2279    1.6457
0.00282      200000    34.2    0        0    13000    #       35.4086    1.5491
0.0027       578000    33.2    0        0    13000    #       34.1368    1.5332
0.00262     2000000    32.5    0        0    13000    #       33.2709    1.5221
0.0026      4000000    32.2    0        0    13000    #       32.9903    1.5184
0.00248    10000000    30.8    0        0    13000    #runout 31.5118    1.4985 
#
#Pts below are fitted stress-strain below fatigue limit
#not used in calculations.
#0.0023     0   28.8 
#0.00201    0    25.6
#0.00177    0    22.7
#0.00165    0    21.4
#0.00152    0    20.2
#