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  3. 8 the stressstrain curve for the steel is shown below...

Question: 8 the stressstrain curve for the steel is shown below...

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8. The stress-strain curve for the steel is shown below. Which statement is Incorrect? o, MPa 500 400- - 250 5o 0.00075 0.02 0.2 0.25 0.28 0.0013 A.Point D is the ultimate stress which is the peak stress. B. Point E is fracture stress, and the steel specimen is broken. C. In the region between B and C, strain hardening occurs. gion between origin and A, when the load is removed, the deformation is reversible. 9. For the same curve in Question 8, what is modulus of elasticity for the steel? A. 20 GPa B. 80 GPa C. 125 GPa D. 200 GPa 10. A straight bar of uniform cross section is tested in tension. The bars cross sectional area is 6.5 cm2, and the length is 4 m. When the tensile load reaches 85 kN, the total elongation is 2.5 mm. The Poissons ratio is 0.35. What is the shear modulus of this bar? A. 210 GPa B. 156 GPa C. 270 GPa D. 78 GPa
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