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Modulus of elasticity from stress-strain graph

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The following data are for cold-worked carbon steel tested in a tensile test:

Original diameter: 12.725 mm
Final diameter: 8.433 mm
Original gauge length: 50.8 mm
Final gauge length: 60.71 mm

(Please see attached)

The maximum load was 74.3 kN. Plot the stress - strain graph and determine;
a. realistic estimation of the modulus of elasticity
b. relationship between stress and strain

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Solution Summary

The modulus of elasticity is estimated by plotting a stress-strain graph.

Solution Preview

Check the Excel file for the graph.

Stress = P / A where P = load in Newtons and A = pi x (d/2)^2 where d is the original ...

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