The aluminum and bronze cylinders are centered and secured between two rigid end-plates by tightening the two steel bolts. There is no axial load in the as- sembly at a temperature of 50F. Find the stress in the steel bolts when the temper- ature is increased to 200F. Use the following data: A (in.) Aluminum cylinder Bronze cylinder Each steel bolt 1.0 in 3 in.4 in. 1.0 in. Aluminum Bronze FIG. P2.92 2.00 3.00 0.75 a (/F) 12.8 x 10-6 10.5 x 10-6 6.5 x 10-6 E (psi) 10 106 12 x 106 29 106