# A thin-walled spherical vessel (1 m inner diameter and $10 \mathrm{~mm}$ wall thickness) is made of a material with $\left|\sigma_{Y}\right|=500 \mathrm{MPa}$ in both tension and compression. If the vessel is evacuated (internal pressure $=0$ ) and subjected to external pressure, yielding according to the von Mises yield criterion (assuming elastic stability until yield) (A) occurs at about half the pressure $p_{Y}$ (B) occurs at about double the pressure $p_{Y}$. (C) occurs at about the same pressure $p_{Y}$. (D) never occurs.

## Question ID - 156260 :- A thin-walled spherical vessel (1 m inner diameter and $10 \mathrm{~mm}$ wall thickness) is made of a material with $\left|\sigma_{Y}\right|=500 \mathrm{MPa}$ in both tension and compression. If the vessel is evacuated (internal pressure $=0$ ) and subjected to external pressure, yielding according to the von Mises yield criterion (assuming elastic stability until yield) (A) occurs at about half the pressure $p_{Y}$ (B) occurs at about double the pressure $p_{Y}$. (C) occurs at about the same pressure $p_{Y}$. (D) never occurs.

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(C) occurs at about the same pressure $p_{Y}$.

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