P5.009 A hollow steel [E = 30,000 ksi] tube (1) with an outside diameter of 2.75 in. and a wall thickness of 0.25 in. is fastened to a solid aluminum [E = 10,000 ksi] rod (2) that has a 2.00-in.-diameter and a solid 1.375-in.-diameter aluminum rod (3). The bar is loaded as shown. Determine (a) the change in length of steel tube (1). (b) the deflection of joint D with respect to the fixed support at A. (c) the maximum normal stress in the entire axial assembly. Answers: 34 kips 18 kips 25 kips (1) 60 in. 34 kips 40 in. 18 kips 30 in. (a) ₁ = in. (b) UD = in. (c) max= ksi