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## Q. 11.2

For the vessel described in Example 11.1, what is the maximum stress at the edge of the opening according to Eq. 11.2?

$\sigma_{\max }=3 \sigma_{1}-\sigma_{2}$                     (11.2)

## Verified Solution

Assuming that $\sigma_{1}=\sigma_{1}$ and $\sigma_{2}=-0.5 \sigma_{1}$, the equation for maximum stress at the edge of the opening is given by Eq. 11.2 as

$\sigma_{\max }=3 \sigma_{1}-\sigma_{2}=3 \sigma_{1}-\left(-0.5 \sigma_{1}\right)=3.50 \sigma_{1}$