A thin-wall circular section beam has a diameter of 200 mm and is 1 m long. One end of the beam is fixed and a torque of 15 kN·m is applied to the beam at the other end. If the maximum allowable shear stress in the beam is 200 MPa and the maximum allowable angle of twist is 2°, calculate the minimum thickness of the beam walls. Use G = 25 GPa. No wrong answers pls , i will rate negative

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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.