고체역학 (Beer) — Stress and Strain—Axial Loading: Problem 2.41

2.41 A brass bolt (\(E_b = 15 \times 10^6\) psi) of \(\frac{3}{8}\)-in. diameter is fitted inside a steel tube (\(E_s = 29 \times 10^6\) psi) of \(\frac{7}{8}\)-in. outer diameter and \(\frac{1}{8}\)-in. wall thickness. After the nut has been fit snugly, it is tightened a one-quarter full turn. Knowing that the bolt is single-threaded with a 0.1-in. pitch, determine the normal stress in (a) the bolt, (b) the tube.