7. A bar of a steel alloy that exhibits the stress-strain behavior shown as follows is subjected to a tensile load; the specimen is 300 mm long and has a square cross section 4.5 mm on a side. (a) Compute the magnitude of the load necessary to produce an

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7. A bar of a steel alloy that exhibits the stress-strain behavior shown as follows is subjected to a tensile load; the specimen is 300 mm long and has a square cross section 4.5 mm on a side. (a) Compute the magnitude of the load necessary to produce an elongation of 0.45 mm. (5 marks) (b) What will be the deformation after the load has been released? (5 marks) 600 500 400 500 Stress (MPa) 300 400 300 Stress (MPa) d 200 200 100 100 0.66 0.006 0.002 0.0044 Strain OL 0.00 0.04 0.12 0.16 0.20 0.08 Strain

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7. A bar of a steel alloy that exhibits the stress-strain behavior shown as follows is subjected to a tensile load; the specimen is 300 mm long and has a square cross section 4.5 mm on a side. (a) Compute the magnitude of the load necessary to produce an

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