A bar of a steel alloy that exhibits the stress-strain behavior shown in Figure is subjected to a tensile load; the specimen is 300 mm (12 in.) long, and of square cross section 4.5 mm (0.175 in.) on a side.

(a) Compute the magnitude of the load necessary to produce an elongation of 0.45 mm (0.018 in.).

(b) What will be the deformation after the load has been released?

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300 2000 10 psi MPa 300 2000 200 200 1000 1000 100 100 0.000 0.005 0.010 0.015 Strain 0.000 0.020 0.040 0.060 0.080 Strain Stress (10 psi) sens (edW) ssens