Question: Derive the expression for the shape-efficiency factor (phi_{B}^{e}) for stiffness-limited design for a channel section of thickness (t), overall flange width (5 t) and overall

Derive the expression for the shape-efficiency factor $\phi_{B}^{e}$ for stiffness-limited design for a channel section of thickness $t$, overall flange width $5 t$ and overall depth $10 t$, bent about its major axis (the dash-dot line in Fig. E10.3). Do not assume that the thin-wall approximation is valid.

Data From Fig, E10.3.

10t 5t FIGURE E10.3

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