A 32-mm rebar with a gauge length of 200 mm was subjected to tension to fracture according to ASTM E-8 method

A 32-mm rebar with a gauge length of 200 mm was subjected to tension to fracture according to ASTM E-8 method. The load and deformation data were as shown in Table Using a spreadsheet program obtain the following: a. A plot of the stress–strain relationship. Label the axes and show units. b. A plot of the linear portion of the stress–strain relationship. Determine modulus of elasticity using the best-fit approach. c. Proportional limit. d. Yield stress. e. Ultimate strength. f. If the rebar is loaded to 390 kN only and then unloaded, what is the permanent change in length? Transcribed Image Text: Load (kN)
Displacement (mm)
Load (kN)
Displacement (mm)
472.9
8.4
62.2
0.1
487.1
9.7
188.9
0.2
496.4
11.1
329.8
0.4
505.7
12.4
383.4
1.7
512.8
13.7
426.0
4.0
522.6
15.3
447.3
5.9
532.4
18.5
462.5
7.2
525.9
22.4

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