A thin-walled spherical vessel (1 m inner diameter and 10 mm wall thickness) is

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A thin-walled spherical vessel (1 m inner diameter and 10 mm wall thickness) is made of a material with |ÏƒY| = 500MPa 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)

Options:

A . occurs at about half the pressure pY .

B . occurs at about double the pressure pY.

C . occurs at about the same pressure pY.

D . never occurs.

Answer: Option C

-NA-

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