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Strain gage reading

  1. Sep 19, 2012 #1
    Hey guys so i did a tensile test lab and got the following results from the strain gage:

    SecondsElapsed Strain u
    0.1 0
    1.1 1
    2.1 1
    3.1 0
    4.1 0
    5.1 1
    6.1 1
    7.1 2
    8.1 5
    9.1 9
    10.1 47
    11.1 129
    12.1 209
    13.1 278
    14.1 335
    15.1 386
    16.1 434
    17.1 482
    18.1 529
    19.1 579
    20.1 627
    21.1 675
    22.1 722
    23.1 770
    24.1 817
    25.1 865
    26.1 913
    27.1 961
    28.1 1009
    29.1 1056
    30.1 1106
    31.1 1154
    32.1 1204
    33.1 1254
    34.1 1306
    35.1 1357
    36.1 1409
    37.1 1462
    38.1 1516
    39.1 1571
    40.1 1626
    41.1 1682
    42.1 1738
    43.1 1795
    44.1 1853
    45.1 1911
    46.1 1969
    47.1 2029
    48.1 2090
    49.1 2150
    50.1 2211
    51.1 2272
    52.1 2334
    53.1 2396
    54.1 2458
    55.1 2522
    56.1 2585
    57.1 2650
    58.1 2714
    59.1 2780
    60.1 2846
    61.1 2912
    62.1 2980
    63.1 3048
    64.1 3121
    65.1 3208
    66.1 3298
    67.1 3391
    68.1 3486
    69.1 3585
    70.1 3689
    71.1 3797
    72.1 3915
    73.1 4043
    74.1 4186
    75.1 4349
    76.1 4531
    77.1 4737
    78.1 4962
    79.1 5206
    80.1 5470
    81.1 5748
    82.1 6038
    83.1 6338
    84.1 6646
    85.1 6964
    86.1 7285
    87.1 7613
    88.1 7946
    89.1 8281
    90.1 8622
    91.1 8961
    92.1 9304
    93.1 9648
    94.1 9996
    95.1 10344
    96.1 10693
    97.1 11043
    98.1 11393
    99.1 11747
    100.1 12102
    101.1 12455
    102.1 12813
    103.1 13169
    104.1 13527
    105.1 13887
    106.1 14245
    107.1 14606
    108.1 14969
    109.1 15331
    110.1 15696
    111.1 16061
    112.1 16429
    113.1 16795
    114.1 17160
    115.1 17529
    116.1 17902
    117.1 18275
    118.1 18649
    119.1 19020
    120.1 19391
    121.1 19764
    122.1 20135
    123.1 20507
    124.1 20880
    125.1 21252
    126.1 21624
    127.1 21998
    128.1 22371
    129.1 22743
    130.1 23114
    131.1 23485
    132.1 23858
    133.1 24228
    134.1 24599
    135.1 24969
    136.1 25340
    137.1 25714
    138.1 26083
    139.1 26456
    140.1 26827
    141.1 27196
    142.1 27568
    143.1 27937
    144.1 28309
    145.1 28682
    146.1 29052
    147.1 29423
    148.1 29792
    149.1 30163
    150.1 30532
    151.1 30904
    152.1 31274
    153.1 31644
    154.1 32015
    155.1 32385
    156.1 32757
    157.1 33126
    158.1 33497
    159.1 33868
    160.1 34237
    161.1 34607
    162.1 34979
    163.1 35349
    164.1 35721
    165.1 36094
    166.1 36467
    167.1 36842
    168.1 37220
    169.1 37601
    170.1 37982
    171.1 38358
    172.1 38738
    173.1 39115
    174.1 39490
    175.1 39869
    176.1 40243
    177.1 40618
    178.1 40994
    179.1 41372
    180.1 41747
    181.1 42122
    182.1 42501
    183.1 42881
    184.1 43264
    185.1 43642
    186.1 44023
    187.1 44402
    188.1 44784
    189.1 45164
    190.1 45543
    191.1 45924
    192.1 46305
    193.1 46688
    194.1 47073
    195.1 47452
    196.1 47835
    197.1 48217
    198.1 48595

    Problem is what units are the strain in?? It goes from 0 - 48595, so I have no idea what units they are or how I'm supposed to work with it? I know strain e=delta l / L, but that's it. Any help would be appreciated.
     
  2. jcsd
  3. Sep 19, 2012 #2
    The output should be in volts, but they look kinda big.
     
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