An aluminum [e = 1 ksi] bar is bonded to a steel [e = 3 ksi] bar to form a composite beam. the aluminum bar has width b = 2.50 in. and height d1 = 0.500 in. the steel bar has width b = 2.50 in. and height d2 = 0.875 in. the composite beam is subjected to a bending moment of m = +150 lb-ft about the z axis.
determine: (a) the maximum bending stresses in the aluminum and steel bars.
(b) the stress in the two materials at the joint where they are bonded together.