1. Rank the magnitudes of the moduli of elasticity for the Will the diameter increase or decrease?
2. A cylindrical bar of aluminum 19 mm (0.75 in.) in diameter is to be deformed elastically by application of a force along the bar axis. Using the data in Table 6.1, determine the force that will produce an elastic reduction of 2.5 x 10-3 mm (1.0 x 10-4 in.) in the diameter.
3. A cylindrical specimen of some metal alloy 10 mm (0.4 in.) in diameter is stressed elasti- cally in tension. A force of 15,000 N (3370 lbf ) produces a reduction in specimen diameter following hypothetical X, Y, and Z materials of 7 x 10-3 mm (2.8 x 10-4 in.). Compute from the greatest to the least. The appropriate A, B, and n parameters (Equation 6.25) Poisson's ratio for this material if its elastic modulus is 100 GPa (14.5 x 106 psi).