We want to ensure the joint can sustain an overpressure of 12 times the normal pressure. Using the expression for the separation factor of safety, find a relation between the preload Fi and the stiffness constant of the joint (C). As we saw in class, the members of the joint should absorb about 80% of the external load. Using this information and the relation you just found, find the necessary bolt preload.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?