1. Suppose there a joint where 13 bolts (M14 x 2, ISO 9.8) are on a 200 mm bolt circle. The bolts are zinc-plated and installed for permanent installation. The

maximum total load is 400,000 N and the minimum load is 100,000 N. The top member of the joint is cast-iron (E = 100,000 MPa)and 20 mm thick, while the bottom member is steel that is 40 mm thick. ) What is the length of the both, L, rounded up to the nearest multiple of 5 mm? ) What is the bolt stiffness, in N/mm? What is the joint stiffness, in N/mm? What is the stiffness constant, C, of the joint? What is the factor of safety in yield, np? • What is the load factor of safety, nı? What is the joint separation factor of safety, no? What is the fatigue factor of safety, nf? o Is this joint safe in both static and fatigue loading? ) What is the torque required to make up the bolts to the required pre-load, in N-mm?