April 2023 1 5 Report
1 A specimen of aluminium having a rectangular cross section 10 mm x 12,7 mm (0,4 in x 0,5 in) is pulled in tension with 35500 N (8000Lbf) force, producing only elastic deformation. Calculate the resulting strain. 2 A tensile stress is to be applied along the long axis of a cylindrical brass rod that has a diameter of 10 mm (0,4 in). Determine the magnitude of the load required produce a 2,5 x 10³ mm (104 in) change in diameter if the deformation is entirely elastic. I 3 A cylindrical a specimen of steel having an original diameter of 12,8 mm (0,505 in) is tensile tested to fracture and found to have an engineering fracture strength of 460 Mpa (67000 psi) it is cross sectional diameter at fracture is 10,7 mm (0,422 in). Determine: 133433 a. The ductility in terms of percent reduction in area b. The true stress at fracture​

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