The tapered stiffened beam below is loaded by forces S1, S2 and S3 as shown. The beam is assumed to consist of stiffeners carrying only direct stress and shear panels carrying only shear stress. (Given a = 100 S = 1700)
Sketch the panel shear flows and the stiffener axial loads. You can provide a single sketch or separate sketches to assist with clarity.
The two-cell tail structure shown below uses 8 stiffeners connected with shear panels. The tail is under the action of a distributed load and moments as shown. Assume the shear panels do not carry any direct stress, and that the shear modulus G = 28 GPa.
(a) Sketch the axial load distribution 250 mm from the fixed end.
(b) Sketch the shear flow distribution 250 mm from the fixed end.
(c) Sketch the location of the shear centre.