stress, in the capsule diaphragm
stress, in the capsule diaphragm
(OP)
if you saw a convoluted capsule diaphragm, you may wonder how to calculate the stress. I do not know. help me?
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stress, in the capsule diaphragm
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stress, in the capsule diaphragmstress, in the capsule diaphragm(OP)
if you saw a convoluted capsule diaphragm, you may wonder how to calculate the stress. I do not know. help me?
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RE: stress, in the capsule diaphragm
I am at a loss to understand Your question. I work with aerospace pneumatic and fluid system components and have never heard of a "convoluted capsule diaphragm"!?!?
Photos/sketch of the component MIGHT help us understand what it is.
Regards, Wil Taylor
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RE: stress, in the capsule diaphragm
thanks.
RE: stress, in the capsule diaphragm
Or a diaphragm pump?
Does the cavity that the diaphragm moves in have a function other than being the surface the diaphragm rests against?
I suspect you're looking for the load or pressure that causes it to invert. Can a test be done?
STF
RE: stress, in the capsule diaphragm
also, it "is" also a diaphragm pump, when the diaphragm is pushed down (as a ground check when installed on fire extinguisher).
i am looking for the cycle life when the diaphragm is pushed down (and let it up) when a constant pressure is applied.
thanks.
RE: stress, in the capsule diaphragm
Anything more profound than that, and you may need to go down to the basics: Timoshenko et. al.
One thing that might help, since the disk is circular, is that you can assume the stress in any "dr" ring is uniform, so it's a one-dimensional integral.
STF
RE: stress, in the capsule diaphragm
RE: stress, in the capsule diaphragm
RE: stress, in the capsule diaphragm
Based simply on what your sketch shows, I don't see how the applied upward pressure force and the axial travel of the piston will overstress the metal diaphragm. The piston and thin metal diaphragm will simply unload once they contact the upper housing surface. However, if pressure is applied to the thin metal diaphragm to drive the piston downward, then you need to look at the stresses in the weld joint between the thin diaphragm edge and the thicker piston edge. This is where it will likely fail when the piston stops against the lower housing surface.
RE: stress, in the capsule diaphragm
(i have no access to FEA.)
RE: stress, in the capsule diaphragm
ps, the diaphragm is not welded to the stop/piston.