# The following is an example SAE Standard Stress-Strain Hysteresis Loop File
# A description of the terms follows the data below.

#NAME=  Proposed SAE Standard Stress-Strain Hysteresis Loop file
#Date=  1999 January 24       # to allow for both N.American 
#                             # & European conventions.
#FileType= strain_stress    #hysteresis strain stress
#DataType= raw              #"raw"= measured, as opposed to "fitted"

#TIMEcol= 0               # if "0" then expect no time column in data
#time_units= seconds   

#STRESS_UNITS= ksi
#Strain_units= microstrain 

# The following is an artificially created data set:
# Strain  Stress

#Loop= 1
0  20
30 0
90  10
98 30 
100 50  
85 65  
50  75 
30 75. 
0 105   
20. 135  
50 150  
80 145  
90 120. 


#Loop= 2
130 0  
180 150  
215 50  
145 50 
215 50 
230 0 

#Loop= 3
340 0 
260 0  
260  70   
310 70 
260 70 
260 150 
330 150 

#loop= 4
380 70 
380 80.  
400 80 
400 70 
380 70 

#loop= 5
450 0  
450 80 
510 80 
450 80 
450 150 
520 150 

#LOOP= 6
  550   0 
550 150 
590 140 
   620 110 
622   70 
610 25 
580 10 
550 0 


#loop= 7
750 0 
670 0 
670 70 
720 70 
  670 70 
670 150 
730 150 

# The data ends here
#Nf= 1000000

# Notes on the Standard Format----------------------------------------------

# Any line with a # sign in the first column is considered a comment line.
# If the line is not a blank or does not start with a "#" it is assumed to
# be a data line.

# Lines begining with the form "#IDENTIFY= value"  lines have a special 
# meaning and are described below.  Although most are optional, and if
# omitted cause assumption of certain default values, it is good practice
# to specify the identifiers explicitly.
#
# There must be one or more spaces (blanks) after each "=" character.
#<hr>
#List of Identifiers  -----------------------------------------------------
#NAME=  Proposed SAE Standard Stress-Strain Hysteresis Loop file
#      NOTE!!!!! this is only a proposal!
#
#Date=  1999 January 24       # to allow for both N.American 
#                             # & European conventions.
#FileType= strain_stress      #other future options:
#                             #strain_life
#                             #dadn             for crack prop.
#                             #rainflow
#                             #time_strain      for Creep data
#                             # nominal_local   for Neuber transform
#
#DataType= raw         # Options: raw, fitted
#                      #   raw       measured data
#                      #   fitted    curve fitted or smoothed data


#<hr>
# Time Stamps
# The "#TIME= value" identify line must be present in a standard file prior to
# any data lines. e.g.:
#
# #TIMEcol=   0    means no time stamp for each data point
# #Timecol=   n    means that column "n" of the data lines is a time value
#
#time_units= seconds      # Options: microseconds, milliseconds, seconds
#                         # default is "milliseconds".
#<hr>
# Units
#STRESS_UNITS= ksi       # options are ksi, MPa, psi
#                        # default is MPa
#
#Strain_units= microstrain   # options are strain, microstrain, percent
#                            # default and recommended is microstrain
#
#<hr>
# Loops Numbers 
# Each Hysteresis loop should be delineated by placing a 
#    "#Loop= value"
# identifier before the start of that loop's data.  If the identifier is not
# present in the file, all data will be assumed to belong to "#Loop= 1"
#<hr>
# Extra Link File Identifiers:
#
# One can create a link to a SAE standard fatigue data file with:
#
#Fatigue_file= <a href="/Fde/Stds/fatigue_std.html">
# Fatigue_file</a>
#
# Similarly a link to a drawing of a specimen (or text file):
#
#Specimen= <a href="/Fde/Stds/axial_1_eg.jpeg">
# Specimen_Drawing</a>
#
# An html link to a micrograph:
#
#Micro_file= <a href="/Fde/Stds/micro_eg.jpeg">
# Micro_example_file</a>
#
# An html link to some over-all data co-ordination page:
#
#Index_file= <a href="/Fde/Stds/data_bank.html">
# Index_example_file</a>
#<hr>
# Note 1:  When this file has been "wrapped" with the saeheadwrap.txt
#          lines at the top of the file, and the saetailwrap.txt at the
# bottom of the file, then, except for the first "#" character,  it conforms
# to the html web page standard.  It is consequently possible to build
# sets of these files into a fairly comprehensive Internet WWW data base.
# The user is encouraged to try to use only simple html tags in his files
# to make the information as widely accessible as possible.
#<hr>
# Note 2:  This file also conforms to a standard "gnuplot" data file.
#        If you wish to take advantage of this feature, make sure you
# do not put in any blank lines with actual space characters on the line.
# "Blank" lines must actually be empty. They cause gnuplot to pick up
# the plotting "pen" momentarily between loops.
# If you wish to plot the loops, and happen to have a typical Linux 
# (or Unix) machine with X11 and Gnuplot loaded (both are fairly standard
# for any Linux machine), then :
#  Start up your X11 windows system 
#  Start Gnuplot in an X11 window with:
#      gnuplot
#  From the gnuplot prompt type:
#      plot 'this_file_name' with lines
#  or for a fancier plot try:
#      plot [-100:900] [-100:300] 'this_files_name' with lines
#
#(for those afflicted with MSDOS, there is also a gnuplot available)
#Send comments to the SAE FD&E Materials Properties Subcommittee,
#or I will relay comments from here: conle(a)fmsrlh*srl*ford*com