A wheel of diameter d and width w carrying a load F rolls on a flat rail. Assume that Fig. 3€“39, which is based on a Poisson€™s ratio of 0.3, is applicable to estimate the depth at which the maximum shear stress occurs for these materials. At this critical depth, calculate the Hertzian stresses σx, σy, σz, and Ï„max for thewheel.

Transcribed Image Text:

Wheel Material Rail Material 3 in 1.25 mm 250 lbf Cast iron Cast iron