고체역학 (Beer) — Stress and Strain—Axial Loading: Problem 2.87

*2.87 A vibration isolation support consists of a rod A of radius \( R_1 = 10 \text{ mm} \) and a tube B of inner radius \( R_2 = 25 \text{ mm} \) bonded to an 80-mm-long hollow rubber cylinder with a modulus of rigidity \( G = 12 \text{ MPa} \). Determine the largest allowable force P that can be applied to rod A if its deflection is not to exceed 2.50 mm.