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
|
Strain
|
Stress
|
Strain
|
Stress
|
|
0.0
|
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.