Question Statement:
Determine the correctness or otherwise of the following statements, [a] and [r],
[a]: Ribs, used in airplane wings, increase the column buckling strength of the longitudinal
stiffeners.
[r]: Ribs distribute concentrated loads into the structure and redistribute stresses around
discontinuities.
Options:
- (A) Both [a] and [r] are true and [r] is the correct reason for [a]
- (B) Both [a] and [r] are true but [r] is not the correct reason for [a]
- (C) Both [a] and [r] are false
- (D) [a] is true but [r] is false .40 A channel section shown in the figure has uniform thickness. It is subjected to an anticlockwise torque of 62.5103 Nmm. The maximum possible thickness of the channel section, such that the shear stress induced in it does not exceed 100 N/mm2, is ____ mm.