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A simply supported composite beam (L = 4.5 m) is subjected to a positive bending moment...

A simply supported composite beam (L = 4.5 m) is subjected to a positive bending moment (680 N- m) at both ends. The beam is made of two materials in a square cross-section. Material 1 is 50x50 mm and is surrounded by a 25 mm shell of material 2. Solve for the maximum stress in each material. E1 = 100 GPa, E2 = 200 GPa.

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