The elastic buckling stress for thin flat plate of length L, depth d and thickness t simply supported along four edges and loaded by bending stress distribution is given b?

fcr = ‚âà√¨‚àö√ë2E/k[12(1-‚âà√≠¬¨‚à´2)(d/t)2].

fcr = ‚âà√¨‚àö√ë2E/k[12(1+‚âà√≠¬¨‚à´2)(d/t)2].

fcr = k‚âà√¨‚àö√ë2E/[12(1+‚âà√≠¬¨‚à´2)(d/t)2].

fcr = k‚âà√¨‚àö√ë2E/[12(1-‚âà√≠¬¨‚à´2)(d/t)2].

The elastic buckling stress for thin flat plate of length L, depth d a

1.	The elastic buckling stress for thin flat plate of length L, depth d and thickness t simply supported along four edges and loaded by bending stress distribution is given b?
A.	f<sub>cr</sub> = ‚âà√¨‚àö√ë<sup>2</sup>E/k[12(1-‚âà√≠¬¨‚à´<sup>2</sup>)(d/t)<sup>2</sup>].
B.	f<sub>cr</sub> = ‚âà√¨‚àö√ë<sup>2</sup>E/k[12(1+‚âà√≠¬¨‚à´<sup>2</sup>)(d/t)<sup>2</sup>].
C.	f<sub>cr</sub> = k‚âà√¨‚àö√ë<sup>2</sup>E/[12(1+‚âà√≠¬¨‚à´<sup>2</sup>)(d/t)<sup>2</sup>].
D.	f<sub>cr</sub> = k‚âà√¨‚àö√ë<sup>2</sup>E/[12(1-‚âà√≠¬¨‚à´<sup>2</sup>)(d/t)<sup>2</sup>].
Answer» E.