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The results of a tensile test on a steel test bar are given below. The initial gauge length was 25.0 mm and the initial diameter was 5.00 mm. The diameter at the fracture was 2.6 mm. The engineering strain and engineering stress in MPa are as follows;
Strain
Stress
0.0
0.06
319.8
0.32
388.4
0.0002
42.0
0.08
337.9
0.34
388.0.
0.0004
83.0
0.10
351.1
0.38
386.5
0.0006
125.0
0.15
371.7
0.40
384.5
0.0015
155.0
0.20
382.2
0.42
382.5
0.005
185.0
0.22
384.7
0.44
378.0
0.02
249.7
0.24
386.4
0.46
362.0
0.03
274.9
0.26
387.6
0.47
250
0.04
293.5
0.28
388.3
0.05
308.0
0.30
388.5
A. Plot the engineering stress-strain curve.
B. Determine i. Young's modulus, ii. the 0.2% offset yield strength, iii. the tensile strength, iv. the percent elongation, and v. the percent reduction of area.
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