Question

1. [30 pt.] A hollow circular post ABC (see figure) supports a load P 1700 lb acting at the top. A second load P2 is uniformly distributed around the cap plate at B. The diameters and thicknesses of the upper and lower parts of the post are das 1.25 in., tAB 0.5 in., dec 2.25 in., andc 0.375 in., respectively (a) Calculate the normal stress ơAB in the upper part of the post. (b) If it is desired that the lower part of the post have the same compressive stress as the upper part, what should be the magnitude of the load P2? (c) If P1 remains at 1700 lb and P2 is now set at 2260 lb, what new thickness of BC will result in the same compressive stress in both parts? AB P2 BC BC

Answer 1

Solva Given, d4 ac 0 375 AG 70o Вс 2 1 700 .178 Same poeveStses al Uppen SC - 2 2-25 -2Co'37s l4- = 21209

P, +P, 끈(-。 2 A ß SC BC 9,95 ( ツ 1700+2260 2,25) -