Question

The buckling of a beam is found to be more if __________.

• A. The breadth of the beam is large
• B. The beam material has large value of Young's modulus
• C. The length of the beam is small
• D. The depth of the beam is small

Answer 1

Answer: (D)

The depth of the beam is small

Critical buckling stress of a column formula is given by

$\sigma =\frac{F}{A}=\frac{{\pi }^2{r}^{2}E}{L^2}$

where $\sigma$ = critical stress

$L$= unsupported length of the column

$r=$ least radius

So if the depth of the beam i small, buckling of a beam will be more.