How would you analyze this semi-circular annular flat plate stress?
How would you analyze this semi-circular annular flat plate stress?
(OP)
I'd like to analyze the stresses when the edge conditions on the outside perimeter are fixed. Roark's only provides a solution when the outside perimeter is free. Any thoughts?





RE: How would you analyze this semi-circular annular flat plate stress?
another day in paradise, or is paradise one day closer ?
RE: How would you analyze this semi-circular annular flat plate stress?
rb, I would love to hear other's opinion on using a complete annulus for this type of analysis. The case I'm actually considering is two halves that form a full annulus. See sketch:
RE: How would you analyze this semi-circular annular flat plate stress?
are you hand calcing this or FEA ? I assume hand calc, but the sketch makes me think of FEA ??
another day in paradise, or is paradise one day closer ?
RE: How would you analyze this semi-circular annular flat plate stress?
It depends on what you need out of it, and how expensive the item is. If you need to confirm it's adequate, an analysis like that may do it. If you need the thinnest possible design, then you're going to make a million of them, you go with finite element analysis.
RE: How would you analyze this semi-circular annular flat plate stress?
I'm trying to conduct hand calculations to determine if the thickness is adequate. I can't omit the split line in the final product (this is all part of a larger assembly that must be bolted together). Whether, or not, I can omit the split line for the calculations is a good question that I can't answer right now.
FEA is not suitable because I need to make various sizes (different OD, ID, pressure, thickness, etc...) on a project-by-project basis. Firing up an FEA package for every case is simply not feasible.
RE: How would you analyze this semi-circular annular flat plate stress?
you could FEA a couple of bounding designs.
FEA on this should be really simple ... you're drafting this, right? import the solid model (I'm assuming), tet-mesh, load one surface with pressure, constrain the perimeter, run ...
or 2D model it with plate elements.
if you're clever you can build the FEM using parameters (OD, ID, t) and so quickly generate the model (without a solid drafting model).
how big is this ? how much pressure ?
another day in paradise, or is paradise one day closer ?
RE: How would you analyze this semi-circular annular flat plate stress?
or You can use Roarks as You said plus superimposition of table here attached (rotation at boundary=0 ; radial stress at splin line=0)excerpt from : Richard Bares - tabulky pro vypocet desek a sten - 1979 (sorry, but I don't know the english title : my translation is "calculation of plates and beams")
RE: How would you analyze this semi-circular annular flat plate stress?
A fixed OD suggests welding, or a larger disk clamped between flanges.
How is the inner bore being sealed to //someThing// to maintain the pressure? Or is this a pressure a brief burst, maybe even a pyrotechnic event?
I'm wondering about even sealing the split line.
RE: How would you analyze this semi-circular annular flat plate stress?
RE: How would you analyze this semi-circular annular flat plate stress?