• Q-2 Figure gives the cross section of a grade 25 cast-iron pressure vessel. A total of N bolts are to be used to resist a M16 x 2 x 60 mm class 5.8 separating force of 36 kip (160.2 kN). hexagonal head bolt • (a) Determine kp, km, and C. • (b) Find the number of bolts required for a load factor of 2 where the bolts may be reused when the joint is taken apart. No: 25 CI 20 mm 20 mm • (c) With the number of bolts obtained in part (b), determine the realized load factor for overload, the yielding factor of safety, and the load factor for joint separation. H = 14.8 mm

Required information A solid square rod is cantilevered at one end. The rod is 0.6 m long and supports a completely reversing transverse load at the other end of ±1.7 kN. The material is AISI 1080 hot-rolled steel. If the rod must support this load for 5 x 104 cycles with a design factor of 1.5, what dimension should the square cross section have? Neglect any stress concentrations at the support end. What will the strength of the metal be at 5 x 104 cycles? The strength of the metal at 5 x 104 will be MPa.

The figure illustrates the connection of a steel cylinder head to a grade 30 cast-iron pressure vessel using N bolts. A confined gasket seal has an effective sealing diameter D. The cylinder stores gas at a maximum pressure pg. For the specifications given in the table for the specific problem assigned, select a suitable bolt length from the preferred sizes in Table A–17, then determine the yielding factor of safety np, the load factor nL, and the joint separation factor n0. See problem number 8-36, and please use the FEA exponential curve-fit for member stiffness.

A bracket shown in Fig.(2) is fastened to the wall by four bolts equispaced on a (10 cm) diameter bolt circle. The bracket is subjected to a fluctuating force (0-50 N) . Find the forces acting on each bolt and then choose a suitable bolt size and a preload that will give minimum safety factor (1.5) for any mode of failure.