Determine the elastic modulus e

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Stress-strain data are plotted in Fig. P4.5 for the initial portion of a tension test on AISI 4140 steel tempered at 538?C (1000?F). Note that data points A and B are labeled with their stress-strain coordinates.

(a) Determine the elastic modulus E.

(b) If a bar of this material 100 mm long is strained to point A and then unloaded, what is its length at point A and also after unloading?

(c) If a sample of this material is strained to point B and then unloaded, what is the plastic (permanent) strain that remains after unloading?

(d) Repeat (b) where the bar is instead loaded to point B and then unloaded.

Reference no: EM131264676

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