A solid circular steel bar (0.2% C, hardened) of diameter 2.0 in. is enclsed by

Question

A solid circular steel bar (0.2% C, hardened) of diameter 2.0 in. is enclsed by a hollow aluminum tube (wrought, 2014-T4) having outside and inside diameters od 3.0 in. and 2.5 in. respectively. THe two bars are held rigidly at the end A and welded to a rigid plate B.

(a) If a torque of 18000 lb-in. and an axial force of 9000 lb area applied to the rigid plate, what are the maximum shear stresses in the aluminum tube and the steel bar?

(b) What is the angle of rotaion of the rigid plate?

(c) What is the change in length of the aluminum tube?

(d) What are the principle strains and the maximum shear strain in the steel bar?

Explanation / Answer

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