Mechanics of materials ,beer and johnston 5th ,3-38P

Question

The aluminum rod AB (G 27 GPa) is bonded to the brass rod BD (G 39 GPa). Knowing that portion CD of the brass rod is hollow and

has an inner diameter of 40 mm, determine the angle of twist at A.

 

Answer 1

Therefore, the angle of twist at A is 6.018 deg.