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Re: Roark & other formulas for stress and strain

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> Do you mean "A pipe is welded normal to a plate (similar to a column on
> a base plate) and this plate is bolted to another plate."?

Yes, similar to a column on a base plate (I should have used that 
analogy),  except the pipe column is not welded to the base plate.  
The pipe is welded to a flange (as one sees on pipe in refineries or 
treatment plants), and the flange is bolted to the square plate.   
Also, the plate is simply-supported around its edges, not just bolted 
at four corners.

> This sounds like a good candidate for FEA.  Why don't you want to use
> it?

FEA is more expensive, I'm not sure it's worth the cost, I'm not 
sure we know the boundary conditions well enough or could model 
them accurately, and  something  similar to Roark or Bjilaard's work 
would be a good first or second pass at the problem.  And it would 
give some point of reference to evaluate FEA, if we do FEA.

Hope this clarifies the problem.



> Lewis C. Midlam

> Dave Evans wrote:
> > 
> > Roark's flat plate formulas don't have the following case; do you
> > know of another reference that does?
> > 
> > A pipe is connected, via a bolted flange, to a square plate, centered
> > on the pipe.  Pipe axis is normal to plane of plate.    Ratio
> > of pipe diameter to side of square is 3/4.
> > 
> > Various axial, shear, bending, and torsional  loads applied to the
> > cantilever, in various directions,  induce out-of-plane deformations
> > in the plate.  The goal is to determine the  plate stresses and
> > deflections (without FEA!)
> > 
> > Thanks in advance,
> > 
> > Dave Evans, P.E.