1.A load test on a 4.5-mm-diameter by 125-mm-long magnesium alloy rod found that a tension load of 831 N caused an elastic elongation of 0.47 mm in the rod. Using this result, determine the elastic elongation that would be expected for a 16-mm-diameter rod of the same material if the rod were 1.6 m long and subjected to a tension force of 3.3 kN.
2.At the proportional limit, a 32-mm-thick by 87-mm-wide bar elongates 10.2 mm under an axial load of 532 kN. The bar is 2.4 m long. Poisson%u2019s ratio, , for the material is 0.27.
Determine a) the proportional limit stress, b) the modulus of elasticity, and c) the change in each lateral dimension (i.e., the change in the thickness and width dimensions).