A bar having the cross section shown has been formed by securely bonding brass and aluminum stock. Taking h=7 mm and using the data given below, determine the largest permissible bending moment when the composite bar is bent about a vertical axis. Brass Aluminum 30 mm 30 mm Aluminum Brass 105 GPa 70 GPa 100 MPa Modulus of elasticity Allowable stress 160 MPa N-m. The largest permissible bending moment is

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Combined Loading

Any functioning component, such as machine parts, structural members, pressure vessels, and so on, are all under the influence of more than one force. When anybody is under the influence of more than one force such as shear forces, bending moments, axial forces, torsion, and so on, then such body is said to be under combined loading. A very practical example of combined loading is the crankshaft of an internal combustion engine (IC engine). The crankshaft of the IC engine is under high rpm, which is caused due to the torsional forces. Due to the presence of piston, counterbalances, and internal imbalances, the crankshaft experiences lateral forces and due to the rise in temperature, the crankshaft undergoes thermal expansion, which pulls the crankshaft along the axial direction and lateral direction. The presence of unbalanced loads along the periphery of the crankshaft also induces a bending moment.