A capped cast-iron pipe is compressed by a brass rod, as shown. The nut is turned until it is just snug, then add an additional quarter turn to pre-compress the CI pipe. The pitch of the threads of the bolt is p = 52 mils (a mil is one-thousandth of an inch). Use the numerical properties provided.
(a) What stresses σp and σr will be produced in the cast-iron pipe and brass rod, respectively, by the additional quarter turn of the nut?
(b) Find the bearing stress σb beneath the washer and the shear stress τc in the steel cap.

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Nut & washer Steel cap c= 1 in. Cast iron pipe (4,-6 in. d 5.625 in.) Brass rod (dr=lin.) Modulus of elasticity, E Steel (30,000 ksi) Brass (14.000 ksi) Cast iron (12.000 ksi)