고체역학 (Beer) — Shearing Stresses in Beams: Problem 6.58

6.58 A steel bar and an aluminum bar are bonded together as shown to form a composite beam. Knowing that the vertical shear in the beam is 4 kips and that the modulus of elasticity is \(29 \times 10^6\) psi for the steel and \(10.6 \times 10^6\) psi for the aluminum, determine (a) the average shearing stress at the bonded surface, (b) the maximum shearing stress in the beam. (Hint: Use the method indicated in Prob. 6.55.)