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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
A hollow steel shaft used in a construction auger has outer diameter d2= 6.0 in. and inner diameter d1= 4.5 in. (see figure on the next page). The steel has shear modulus of elasticity G = 11.0 × 106 psi.
For an applied torque of 150 k-in., determine the following quantities
(a) shear stress t2 at the outer surface of the shaft,
(b) shear stress t1 at the inner surface, and
(c) rate of twist θ (degrees per unit of length).
Also, draw a diagram showing how the shear stresses vary in magnitude along a radial line in the cross section.

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