A hollow bronze shaft of 75 mm outside diameter and 12.5 mm thick is coaxial with a solid steel shaft of 50 mm diameter and of the   same length as the hollow shaft .  These shaft are then fastened rigidly together   at their ends .The compound shaft transmits   a total torque of 5693 Nm.  Calculate :  The torque  transmitted   by the  steel  and  the bronze shafts

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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.