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categoryهندسة مواد schoolبكالوريوس event_available2026-07-14

السؤال

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5. A cylindrical specimen of aluminum having a diameter of 12.8 mm and a gauge length of 50.800 mm is pulled in tension. Use the load-elongation characteristics tabulated below to complete parts (a) through (f). Use SI unit system. Load Length N lbf mm in. 0 0 50.800 2.000 7330 1650 50.851 2.002 15,100 3,400 50.902 2.004 23,100 5,200 50.952 2.006 30,400 6,850 51.003 2.008 34,400 7,750 51.054 2.010 38,400 8,650 51.308 2.020 41,300 9,300 51.816 2.040 44,800 10,100 52.832 2.080 46,200 10,400 53.848 2.120 47,300 10,650 54.864 2.160 47,500 10,700 55.880 2.200 46,100 10,400 56.896 2.240 44,800 10,100 57.658 2.270 42,600 9,600 58.420 2.300 36,400 8,200 59.182 2.330 Fracture (a) Plot the data as engineering stress versus engineering strain. (b) Compute the modulus of elasticity. (c) Determine the yield strength at a strain offset of 0.002. (d) Determine the tensile strength of this alloy. (e) What is the approximate ductility, in percent elongation? (f) Compute the modulus of resilience.

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