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A query regarding constructing vacuum sealed vessels

Typically the maximum stress for a thin walled spherical pressure vessel for a given diameter, thickness and pressure is: $$\sigma = \frac{P\cdot R}{2\cdot t}$$ where: $\sigma$ is the observed ...
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How does a pressure vessel fail when the interal pressure exceeds the yield stress of the material?

Short answer No. Although material may yield locally, it does not have to lead to failure. There is also a design with multiple pre-stressed walls, which may contain fluid at a higher pressure than ...

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