A hollow circular tube T of length L = 15 in. is uniformly
compressed by a force P acting through a rigid plate (see
figure). The outside and inside diameters of the tube are
3.0 and 2.75 in., respectively. A concentric solid circular
bar B of 1.5 in. diameter is mounted inside the tube.
When no load is present, there is a clearance c _ 0.010
in. between the bar B and the rigid plate. Both bar and
tube are made of steel having an elastoplastic stress-
strain diagram with E = 29 x 103 ksi and ๐Y = 36 ksi.
(a) Determine the yield load PY and the corresponding
shortening แบY of the tube.
(b) Determine the plastic load PP and the corresponding
shortening แบP of the tube.
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