Chapter 6, Problem 6.3.8P

Consider the preceding problem if the beam has width h = 15 mm, the aluminum strips have thickness t = 3 mm, the plastic segments have heights d = 40 mm and 3 tf = 120 mm, and the total height of the beam is h = 212 mm. Also, the moduli of elasticity are E_A= 75 GPa and E_p=3 GPa, respectively.

Determine the maximum stresses o., and o\, in the aluminum and plastic, respectively, due to a bending moment of 1.0 kN - m.