## Stress Analysis - Annulus Circular Plate

I'm doing stress analysis on a circular region on this part where an o-ring seals against.

There is a 7500 PSI normal force being applied on it.

So you can think about it as an annular circular flat plate (like a washer) with the 7500 PSI force uniformally distributed on the surface.

I want to analyze things like the max bending moment & stress if it is fixed on the inside edge...

and shearing stress.

Help would be appreciated..

Also as a side note:

How would you convert that pressure (7,500 PSI) to a force per unit length versus per unit area?

Thanks

 Quote by harrisiqbal How would you convert that pressure (7,500 PSI) to a force per unit length versus per unit area?

As for it being for a force per unit length, this didn't make much sense to me. The closest thing I found quickly online was surface tension (Newtons/meter). See here: http://en.wikipedia.org/wiki/Surface_tension

But if you want to know the force... PSI stands for pound-force per square inch

You could just use 7500 pounds force as the force (per square inch). So if the area of your washer is 5 in2, your force would be 7500lbf/in2 * 5in2 =37500 lbf.

So if you find your washer is suitable to support a pressure of 7500PSI, you could say that it is suitable to a force that is equal to the PSI * the area.

Of course, if there is any way somebody could get hurt, which I assume there is with this much pressure, you need a more detailed analysis of the physical structure and it's assembly.
 Not entirely sure, but for a rough estimate you could take a strip of the circular plate, then analyse it as a simple cantilever. Get your moments, shear forces, stresses and integrate it over the inner circle. That should atleast provide a sanity check to a FEM model.

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