Consider shear panels with uniform thickness of 5 mm made of aluminum alloy with E = 70GPa, and ν = 0.33. Assume simply supported boundary conditions on all edges. One panel is flat while the other panel comprises the same amount of material but is bent into a cylindrical shape.

a) If the panels are loaded with uniform shear along their edges, determine the buckling stress τcr for each of the two panels. Use the charts included on the last page of this assignment for the curved panel case.

b) If the panels are loaded with uniform normal stress along the shorter end, as shown, determine the buckling stress σcr for each of the two panels. Also, for the case of the flat panel, make a sketch illustrating the buckling mode that you expect. [Note: for the curved panel case, look up an appropriate formula/data from "Roark’s Formulas for Stress and Strain.

c) Compare all results and comment.