A hollow steel shaft transmits 600 kW at 500 rpm. The maximum shear stress is 62.4 MPa. Find the outside  and inside diameter of the shaft, if the outer diameter is twice of inside diameter, assuming that the  maximum torque is 20% greater than the mean torque The answer is 100mm and 50 mm. can you help me this calculation and i give the answer already. and write with pen. tqvm

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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.