A steel railway car wheel may be considered a cylinder with a radius of 440 mm. The wheel rolls on a steel rail whose top surface may be considered another cylinder with a radius of 330 mm. For the steel wheel and steel rail, E = 200 GPa, v = 0.29, and Y = 880 MPa. If the wheel load is 110 kN, determine σmax, τmax, τoct(max), 2τ0, and the factor of safety against initiation of yielding based on the maximum shear-stress criterion.
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