Using the graph below, answer the following questions: (note, the inset chart sh

Question

Using the graph below, answer the following questions: (note, the inset chart shows the low-strain portion of the curve) a) Does this plot more likely show engineering-stress vs. engineering-strain or true-stress vs. true-strain? b) Determine the ultimate tensile Strength and the 0.2% offset yield Strength. Show your work (draw on the chart, write the numerical answer, etc). c) The plot is labeled "Stress" and "Strain". Is this Engineering Stress, or True Stress? a. Engineering b. True c. Both d. Can't tell from the graph d) Calculate the elastic modulus for this material?

Explanation / Answer

a)the plot shows engineering stress versus engineering strain

b)ultimate tensile strength is 500 MPa and 0.2% offset yield strength is approximately 350MPa

c)engineering

d)elastic modulus =stress/strain=350/.002=175000MPa

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