# For the shaft application defined in Prob. 379, p. 139, the input shaft EG is driven at

## Question:

Prob. 3€“79, Repeat Prob. 3€“77 with T = 900 lbf · in, a = 6 in, b = 5 in, c = 10 in, d = 1.375 in, e = 4 in, f = 10 in, and g = 6 in.

Repeat Prob. 3€“77, A torque T = 100 N · m is applied to the shaft EFG, which is running at constant speed and contains gear F. Gear F transmits torque to shaft ABCD through gear C, which drives the chain sprocket at B, transmitting a force P as shown. Sprocket B, gear C, and gear F have pitch diameters of a = 150, b = 250, and c = 125 mm, respectively. The contact force between the gears is transmitted through the pressure angle Ï† = 20°. Assuming no frictional losses and considering the bearings at A, D, E, and G to be simple supports, locate the point on shaft ABCD that contains the maximum tensile bending and maximum torsional shear stresses.

Combine these stresses and determine the maximum principal normal and shear stresses in theshaft.

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## Shigleys Mechanical Engineering Design

**ISBN:** 978-1121345317

9th edition

**Authors:** Richard G. Budynas, J. Keith Nisbett