Is Shear Stress Area in a Hollow Shaft the Empty Space?

AI Thread Summary
The discussion clarifies that in the context of shear stress in a hollow shaft, the area A refers to the average area between the outer and inner surfaces of the shaft, not just the empty space. It is emphasized that A is defined by the midline of the structure. The importance of using pascals as the unit for stress is also highlighted. Overall, the conversation focuses on accurately understanding the shear stress area in hollow shafts. This ensures proper calculations in engineering applications.
member 392791

Hello,

I am wondering, is the area A in the equation meant to be the area of the empty space in the shaft, going all the way to the half way point of the structure (meaning, the area of the space included in the dotted lines in the diagram on my attempt?
 

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Yes, A is the area enclosed by the midline. As I said in your other problem, A is the average of the area to the outside surface and the area to the inside surface.
 
Okay, how does it look now?
 

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Looks good. Your stress units should probably be in pascals.
 

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