A30-mm thick aisi 1020 steel plate is sandwiched between two 10-mm thick 2024-t3 aluminum plates and compressed with a bolt and nut with no washers. the bolt is m10 × 1.5, property class 5.8. (a) determine a suitable length for the bolt, rounded up to the nearest 5 mm. (b) determine the bolt stiffness. (c) determine the stiffness of the members.

A12 mm diameter shaft runs in a plain cylindrical bush 30 mm long that is located in an 18 mm diameter hole in a housing. the shaft-inner bush fit is h8 f and the outer bush-housing fit is h7-p6. make a fully cimensioned sketch of the bush with tolerances. find the maximum and minimum clearance or interference for both fits on the inner and outer diameters of the bush