Re: SIF on elbow weldolet

From: <Guillermo>
Date: Mon Mar 29 2004 - 11:07:00 EST

Im using Pipepak of Algor software

Thanks

• Original Message -----
  From: Al
  To: <a href="/group/PipingDesign/post?postID=O5gwUh9cllr-hhKxj5dXdpO3XiH2buonndtSXzUCWlytByKnWeoOcYke7JRhZfxSIVLzbqPs-bAXKjLYVm7_dTW0M6oLTg">PipingDesign@yahoogroups.com</a>
  Sent: Saturday, March 27, 2004 2:29 PM
  Subject: RE: [PipingDesign] SIF on elbow weldolet
  

what fea software are you using? this affects the answer needed to insert
because it depends how the "fea software" will apply and interpret it. eg
what form are the stresses computed in. Are they von mises, or principal
stresses, or Stress intensities, are they linearized?

For each element in isolation (from the caesar Scratchpad)
for the bend,(assuming 1.5D bend)
Bend in plane sif 4.27
Bend in plane sif 3.559
in plane flex factor 17.054
out of plane flexibility 17.054

for the wol
Header SIF(i) 6.983
Header SIF(o) 8.977

Header SIF(i) 6.983
Header SIF(o) 8.977

this gives you a starting point (for a beam element analysis only with the
two effects sufficently removed from each other)
but method of applying it cannot be provided without knowing more about how
you intend to use it and what your software is doing.
Remember you are responsible for understanding what the software is doing,
not the software.

the above does not give a combined SIF of both occuring simultaneously and
adjacent. For that
FEa software could be employed to determine the combined stress effect of
the discontinuity.

-----Original Message-----
From: Guillermo Guerra [mailto:geci@infosel.net.mx]
Sent: Friday, March 26, 2004 4:27 PM
To: <a href="/group/PipingDesign/post?postID=O5gwUh9cllr-hhKxj5dXdpO3XiH2buonndtSXzUCWlytByKnWeoOcYke7JRhZfxSIVLzbqPs-bAXKjLYVm7_dTW0M6oLTg">PipingDesign@yahoogroups.com</a>
Subject: [PipingDesign] SIF on elbow weldolet

Hi
Im working on the flexibility analysis of a pipe
On one of the conections I have
An 24 in diameter elbow and inserted an 16 in diameter weldolet.

On my FEA software I can represent as a Tee and a reduction, but I dont know
the values that I need to assign for SIF.

On ANSI B31.3 dont represent this type of conection

Thanks

[Non-text portions of this message have been removed]

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[Non-text portions of this message have been removed] Received on Mon Mar 29 11:07:00 2004