The figure shows a 6 inches long horizontal post labeled 1 on the left fixed to a rigid support on the left at A. A cylindrical rod B C of length 18 inches and labeled 2 is fixed to a rigid support on the right at C. A flange is shown at B. The gap between the post and the flange is one sixteenth of an inch.

Compute the stresses induced in the aluminum rod (2) and the brass post (1) when the 1/16-in. (0.0625 in.) gap between flange B and the brass post is closed by bolts.