Introduction : refer to lab sheet
Method : refer to lab sheet
Results : see lab sheet with a comprehensive breakdown of each measurement and a drawn graph.
Below is a digitally drawn graph with the results
Discussion
Compare and comment on the calculated ε and the recorded εl recorded εl ( x 10-6)
0
32.00
64.00
96.00
126.00
154.00
187.00
218.00
250.00
278.00 calculated ε(x 10-6)
0
30.21
60.42
91.03
121.84
147.87
179.27
209.09
240.49
267.92 difference x 10-6
0
1.79
3.58
4.97
4.16
6.14
7.73
8.91
9.51
10.08
1.In order to compare the values of ε and εl , a table was created to show the differences between the recorded and calculated figures. The differences range between 0 -10.08. It can then be deduced that the variation is not huge due to the fact that the measurements are in micro strain (10-6). The variation between the individual figures can be explained as the result of the effects that atmospheric conditions had on them such as room temperature or by human error while reading the values of δ on the gauge, also the way the weights were put on, if they were put on then removed rather than them being systematically put on correctly.
2. Compare calculated result of Poisson’s ratio with expected result ν=0.3 and comment on possible sources of errors. The results for my results for Poisson’s ratio are as follows:
My recorded value for Poisson’s ratio is close to the expected value with a minor difference of 0.0222. This difference may have been caused by the errors mentioned above. If these errors are eliminated
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