This layout is very similar to my logo which features a similar high local
stress problem, not solved by oversimplified methods.
what you are doing is a very bad design. The tool you are using is
inappropriate
and will not come anywhere close to giving you a correct answer. You are
trying to use a beam element analysis for a high serious local stress issue.
The tool is specifically not intended for such applications which is why it
is not provided as a "pushbutton" or built-in option.
Even the configuration/layout is bad.
You unquestionably must engage the services of someone who knows what they
are doing unless you wish to hurt/injure someone , cause huge plant losses
or worse kill somebody.
al
-----Original Message-----
From: Guillermo Guerra [mailto:geci@infosel.net.mx]
Sent: Monday, March 29, 2004 11:03 AM
To: <a href="/group/PipingDesign/post?postID=oTZnLVHpb8Lp6jHNdpG1fxiZb_ZEFEhsqk7y5UHPv5lYvufpSWzzOcyIXAq9oLm6icyH1BwHgBGSdRsD-sEqn8ex">PipingDesign@yahoogroups.com</a>
Subject: Re: [PipingDesign] SIF on elbow weldolet
Hi Al
Im using Pipepak Algor
I can send to you an image file with part of the piping showing the elbow and elbolet but the system donot send files.
I sen to you to your email direction
Thanks
>
> 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=oTZnLVHpb8Lp6jHNdpG1fxiZb_ZEFEhsqk7y5UHPv5lYvufpSWzzOcyIXAq9oLm6icyH1BwHgBGSdRsD-sEqn8ex">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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> PipingOffice - Excel Spreadsheets for Piping Calculations
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> =========================================
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>
>
>
>
>
>
>
>
> =========================================
> PipingOffice - Excel Spreadsheets for Piping Calculations
> <a href="http://www.pipingoffice.us/">http://www.pipingoffice.us/</a>
> =========================================
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Yahoo! Groups Links Received on Mon Mar 29 14:42:00 2004
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