Question 2) (30 P) The two solid steel shafts shown in the figure are connected to each other using gear wheels. The length of the CD spindle is LCD-2.5 m and the length of the AB spindle is LAB= 2 m. The radius of gear C is re-40 mm and the radius of gear B is rg= 100 mm. The CD and AB shafts rotate freely in the bearings on which they are supported. Also, shaft AB is fixed at point A. Each shaft has a diameter of 25 mm and a shear modulus of G=70 GPa. When a torque of T-600 N.m is applied to the CD shaft from the D end; A LAB C rc LCD T D

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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.