Based on the 100 MPa allowable stress for the aluminum, the maximum moment that can be applied to the composite bar is:
Based on the 140 MPa allowable stress for the brass, the maximum moment is:
Therefore, the maximum moment that can be applied to the composite bar without exceeding either allowable stress is M = 2,755,557 N-mm = 2.76 kN-m. The aluminum controls the capacity of this composite bar.