The drill pipe has an outer diameter of 3 in., a wall thickness of 0.25 in., and a
Chapter 9, Problem 9-42(choose chapter or problem)
The drill pipe has an outer diameter of 3 in., a wall thickness of 0.25 in., and a weight of 50 lb/ft. If it is subjected to a torque and axial load as shown, determine (a) the principal stress and (b) the maximum in-plane shear stress at a point on its surface at section a.
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