1.

At full plasticity, the stress in web is given by

A. f<sub>w</sub> = f<sub>y</sub> [1+( <sub>w</sub>/ <sub>y</sub>)<sup>2</sup> ].
B. f<sub>w</sub> = f<sub>y</sub> [( <sub>w</sub>/ <sub>y</sub>)<sup>2</sup> ].
C. f<sub>w</sub> = f<sub>y</sub> [1-( <sub>w</sub>/ <sub>y</sub>)<sup>2</sup> ].
D. f<sub>w</sub> = f<sub>y</sub> [1+2( <sub>w</sub>/ <sub>y</sub>)<sup>2</sup> ].
Answer» D. f<sub>w</sub> = f<sub>y</sub> [1+2( <sub>w</sub>/ <sub>y</sub>)<sup>2</sup> ].


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