Part A - Free-body diagram of the resolved components of the moments   The two externally applied moments can be resolved into their respective y and z components. Determine the moments in each principal direction, My and Mz, and draw the corresponding free-body diagram.     Part B - Moments of inertia of the cross section with respect to the y- and z-axes To calculate the absolute maximum bending stress in the member using the flexure formula for unsymmetrical bending, the moments of inertia of the cross section must be calculated. Select the correct formulas for these values. Iy=?     Part C - Neutral-axis angle due to externally applied moments   The neutral-axis angle of the cross section being analyzed is the axis along which there is a zero stress value. Determine the neutral-axis angle, αα, due to the externally applied moments as measured counterclockwise from the positive z axis in the yz plane. |α| =? Part D - Absolute maximum stress in cross section ABCD   Determine the absolute maximum stress, |σmax|, in cross section ABCD due to the two externally applied moments. |αmax|=?

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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.