고체역학 (Beer) — Stress and Strain—Axial Loading: Problem 2.5

2.5 An aluminum pipe must not stretch more than 0.05 in. when it is subjected to a tensile load. Knowing that \( E = 10.1 \times 10^6 \text{ psi} \) and that the maximum allowable normal stress is \( 14 \text{ ksi} \), determine (a) the maximum allowable length of the pipe, (b) the required area of the pipe if the tensile load is \( 127.5 \text{ kips} \).