# Specimen nr. 938e loaded 3 times in Tension testing
# Ref.: J.Bauschinger, "Ueber die Veraenderung der Elasticitaetsgrenze
# und der Festigkeit des Eisens und Stahls durch Strecken und Quetschen, 
# durch Erwaermen und Abkuehlen und durch oftmal wiederholt Beanspruchung,"
# Mittheilungen aus dem Mechanisch-Technischen Laboratorium der
# K. Technischen Hochschule in Muenchen, 1886, Seiten 1-116 plus 3 figures.
# (there are two "Seiten" numbers per page)
#
# Copyright (C)  2014  Fatigue Design Evaluation Comm.
#    Permission is granted to copy, distribute and/or modify this document
#    under the terms of the GNU Free Documentation License, Version 1.3
#    or any later version published by the Free Software Foundation;
#    with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
#    A copy of the license is available here:
#     "GNU Free Documentation License": "http://www.gnu.org/licenses/fdl.html"
#
# Bauschinger's tables are composed of half-cycles in tension or 
# compression,  with some unload/reload interludes in these larger
# half cycle sets.   Each half cycle test has re-zeroed the 
# extensometer.  Also at the begin of each set he measured the diameter
# and the length of the sample,  but I suspect that the length
# measurement is not as accurate as the extensometer measurements.
# At the top of a tensile half cycle set, or at bottom of the compressive
# half cycles, the scales of the extensometer become unreadable due to
# continuous flow caused by the load/weight increment.   There is often
# no unloaded deflection reading after this occurs, thus one must guess
# at the final defl. at the large loads,  or use the next set's  initial
# measured specimen length to back calculated where the previous peak
# ended.  
# Thus some of the end points of the half cycle sets printed here are
# questionable guesses made by me and should not be blamed on Bauschinger.
# Note that when there are 3 numbers in a line and the first two are 0,
# then the third number is a left-over deflection from the previous test
# loading, and should be added to all following deflections.
# AC Oct 2014

# Bauschinger, Table 6  on pg. 21-22
# Iron, test Nr. 1  in Tab. 1.
# in tons,  Deflection in 1/1000 cm
# Specimen nr. 938e loaded 3 times in Tension testing
#Tons cm  cm
  0   0   0   #Initial d=2.50cm  L=15.00 cm
1 1.43        # (thus:   1.43cm/1000cm = strain)
2 2.89
3 4.32
4 5.75
5 7.16
6 8.61
7 10.06
8 11.48
0 0.02
8  11.48
8.5 12.17
9 12.9
9.5 13.67
10 14.59
0  0.13
10 14.72
10.1 14.97
10.2 15.17
10.3 15.36  # 4h 19'
10.4 15.6   # 22'
10.5 15.8   # 25'
10.6 16.15  # 28'
10.7 17.10  # 31'
10.8 114.99 # 34' Scales run so quickly that nothing can be read (fast yielding)
0  97.30  # Measured after unloading
 #           Before next test:  d=2.50cm  L=15.10cm suggests 
 #           perm. strain= (15.10-15)/15 =.0067
 #     "Elastic after effect noticeable, but small"
 # Test loading nr. 2  specimen nr. 938e
 # 7 minute pause   Note:  L=15.10  D=2.50cm
 #Tons cm  cm
  0   0  97.30  #note: he re-zeroed the extensometer here, thus add 97.3
1 1.49 #  The computer will pick up the "0 0" above and add the 97.30
2 2.99
3 4.52
4 6.07
5 7.63
6 9.2
7 10.84
8 12.51
0 0.15    # unload
8 12.51
8.5 13.33
9 14.22
9.5 15.1
10 16.13
0  0.45  # unload
10 16.28
10.5 17.5
10.6 18.06
10.7 18.91
10.8 19.79
10.9 20.86
11.0 22.47
 # .c scales move so fast that unable to read
11.1 30.22
11.2 38.46
11.3 54.66
0 35.91    #unload  5hr 54'
0 35.83    #         57'
0 35.67    #        15 hrs.
 #       Length is now L=15.13cm  d=2.495cm
 # Test 3 specimen nr. 938e after 62 hrs: retest
 #   Note: he re-zeroed the extensometer here
0   0    35.67  # add the 35.67 to all below.
1 1.50 
2 3.0
3 4.51
4 6.02
0 0.02   #
4 6.01
5 7.55
6 9.06
7 10.60
8 12.11
0  0.04  #
8 12.11
8.5 12.88
9 13.63
9.5 14.41
10 15.19
0 0.06      #
10 15.17
10.5 15.96
11 16.75
11.5 17.57
12 18.58
0 0.32      #
12 18.69    # after 4h39'
12.1 19.83  # after 42'
12.2 22.10  # after 45'
12.3 24.10  # after 48'
12.4 25.78  # after 51'
12.5 27.73  # after 54'
12.6 31.13  # after 57'
12.7 142.58  #not readable after 9h 0'
12.7 142,58  # 15'
0 120.65     # after 151/4 , '
0 120.53     # after 16'
0 120.47     #after 16'
0 120.44    # after 17'
0 120.42 #after 19'
0 120.41 #after 20'
0 120.37 #after 25'
0 120.32 #after 30'
 # End of test sample nr. 938e, weld steel
 # Test ends 27 March 1880
 # Specimen was subsequently (See Table I seite 53-54) fractured
 # by applying 19.0t 
 # Ultimate strength, based on original area,  3870_at
 #%RA= 43 % reduction in area
 #Total strain based on Lo=25cm = 24.8%