Stress forces on a cubic case due to a vacuum

In summary, the conversation is discussing the feasibility of creating a vacuum inside a metal cubic casing with specific parameters. The question is whether it is realistic to build a casing of this size and thickness that can withstand the pressure difference without collapsing. A potential solution is suggested, which is to use a diver's pressure chamber that can withstand high positive atmospheres.
  • #1
J.Eustache
1
0
This question is really out of curiosity, and also due to my very limited knowledge of basic physics(biomed sciences tend to not teach you this).

Say I wanted to create a vacuum inside a metal cubic casing with the following parameters:

-The case is a cube, that measure 1x1x1m, so has a volume of 1m^3.
-The pressure inside is 24 torr, whilst the pressure outside is 760 torr(atmospheric).

What kind of stress force would this casing have to endure? Would it be realistic to build a casing this size, maybe 2-4cm in thickness, that could withstand such a pressure without collapsing?

Thanks in advance,
J
 
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  • #2
J.Eustache said:
Would it be realistic to build a casing this size, maybe 2-4cm in thickness, that could withstand such a pressure without collapsing?
Why not just rent a diver's pressure chamber? They can withstand tens of positive atmospheres. They'll be able to withstand one negative atmosphere.
 

1. What is a vacuum?

A vacuum is a space that is completely devoid of matter, including air. It is a low-pressure environment where there is no atmospheric pressure.

2. How are stress forces created in a vacuum?

In a vacuum, there is no surrounding atmosphere to counterbalance or distribute the force applied to an object. As a result, the force is concentrated on the object, creating stress forces.

3. What are the effects of stress forces on a cubic case in a vacuum?

The stress forces on a cubic case in a vacuum can lead to deformation or structural failure of the case. This is because there is no atmospheric pressure to provide external support and balance the internal pressure.

4. How can stress forces be measured in a vacuum?

To measure stress forces in a vacuum, specialized equipment such as strain gauges or load cells can be used. These devices can detect and measure the amount of force applied to an object in a vacuum.

5. Can stress forces in a vacuum be reduced or eliminated?

Stress forces in a vacuum can be reduced by designing the object to withstand the internal pressure or by using materials with higher strength and rigidity. However, it is not possible to completely eliminate stress forces in a vacuum as they are a natural result of the absence of atmospheric pressure.

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