고체역학 (Beer) — Stress and Strain—Axial Loading: Problem 2.18

2.18 The brass tube AB (\(E = 15 \times 10^6\) psi) has a cross-sectional area of \(0.22 \text{ in}^2\) and is fitted with a plug at A. The tube is attached at B to a rigid plate that is itself attached at C to the bottom of an aluminum cylinder (\(E = 10.4 \times 10^6\) psi) with a cross-sectional area of \(0.40 \text{ in}^2\). The cylinder is then hung from a support at D. To close the cylinder, the plug must move down through \(3/64 \text{ in.}\) Determine the force P that must be applied to the cylinder.