Section A6.8 example 1


Consider the single cell, thin-walled section shown made of aluminum with the given properties. With the torque T=134,400 in-lb, determine



(a) Since this ia a single-cell section, there will only be one shear flow of constant magnitude along all webs.

Correction: The quantity shown inside the brackets is only half as opposed to the whole cell area. However, the value of q = 100 lb/in is correct as it is based on the whole cell area.

(b) Because the skin has two different thicknesses, there will be two different shear stresses.

Notice that the maximum shear stress is located in the thinest section. This will always be true when dealing with single cell problems.

(c) The angle of twist, with this shear flow distribution, will be

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