9. A tensile test on a specimen of circular cross section of original diameter 0.364 inch...

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9. A tensile test on a specimen of circular cross section of original diameter 0.364 inch was performed to obtain stress-strain data for a steel alloy. In the plastic range the loads and corresponding diameters were measured as shown in the chart. Load (lb) Diameter (in.) 3500 0.352 4300 0.350 4800 0.347 5175 0.344 5400 0.340 5650 0.334 5775 0.324 5800 0.316 5700 0.302 5600 0.290 5300 0.270 5050 0.260 4950 0.255 4650 0.235 Fracture a. Determine the true stress and true strain values. b. Determine the engineering stress and engineering strain values. c. Plot true stress true strain on a log-log plot and determine the strength coefficient k and strain-hardening exponent n. d. Plot a true stress-strain curve and an engineering stress-strain curve on the same plot and compare the curves. 9. A tensile test on a specimen of circular cross section of original diameter 0.364 inch was performed to obtain stress-strain data for a steel alloy. In the plastic range the loads and corresponding diameters were measured as shown in the chart. Load (lb) Diameter (in.) 3500 0.352 4300 0.350 4800 0.347 5175 0.344 5400 0.340 5650 0.334 5775 0.324 5800 0.316 5700 0.302 5600 0.290 5300 0.270 5050 0.260 4950 0.255 4650 0.235 Fracture a. Determine the true stress and true strain values. b. Determine the engineering stress and engineering strain values. c. Plot true stress true strain on a log-log plot and determine the strength coefficient k and strain-hardening exponent n. d. Plot a true stress-strain curve and an engineering stress-strain curve on the same plot and compare the curves.