he design of a machine element calls for a 40-mm-outer diameter shaft to transmit 45 kW. (a) If the speed of rotation is 720 RPM, determine the maximum shearing stress in shaft a. (b) If the speed of rotation can be increased 50 % to 1080 RPM, determine the largest inner diameter of shaft b for w/c the maximum shearing stress will be the s

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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.