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Calculate the stress in a beam and compare these results with actual results found

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Introduction

Engineering Applications Mechanics TIM BARNETT SE32403 00361755 Log entry 1 Experiment 1 The experiment is to calculate the stress in a beam and compare these results with actual results found. The equipment used: - Strain gauge Metal bar Weights in 1kg increments G-clamp Weighted hook Vichy Strain Bridge The metal bar, complete with the weighted hook is clamped to the table, and then the strain gauge is connected to the strain bridge and zeroed. ...read more.

Middle

Results are as follows Weight loaded Strain 1 kg 51 *10-6 2 kg 102 *10-6 3 kg 153 *10-6 4 kg 202 *10-6 5 kg 253 *10-6 As you can see the results go up uniform ally. Theory The following equations are used to calculate the final stress on the bar. ...read more.

Conclusion

=7.35 39.24 * 0.25 =9.80 49.05 * 0.25 =12.26 I =bd 0.04*0.006/12 12 =7.2 * 10-10 E for steel is =200 * 10 9 12.26 * 0.003/7.2 * 10-10 = 51.19 N/m2 Strain 51.19/200 * 10.9 =255 * 10-6 As you can see the actual result of 253 * 10-6 is very close to the theoretical figure of 255 * 10-6, so the actual test was correct. ...read more.

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