II E C Example 1 A short post constructed from a hollow circular tube of aluminum supports a compressive load of 26 kips (Fig. 1-5). The inner and outer diameters of the tube are di 4.0 in. and d. 4.5 in., respectively, and its length is 16 in. The shortening of the post due to the load is measured as 0.012 in. Determine the compressive stress and strain in the post. (Disregard the weight of the post itself, and assume that the post does not buckle under the load.) 26 k 血 16 in. 4 9 Notes 19 甲 HO Question 1: (6marks) A short cylinder (do = 0.6 in., Lo= 1.0 in.) is compressed between two smooth rigid plates by an axial force P=5 kips. (a) If the measured shortening of the cylinder due to this force is 0.00105 in., what is the modulus on elasticity, E, of the material? b) If the increase in diameter is 0.00021 in., what is the value of Poisson's ratio, v, for this material?