×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Simply supported pipe on a support - is this possible?

Simply supported pipe on a support - is this possible?

Simply supported pipe on a support - is this possible?

(OP)
Hi,

I am trying to simulate a pipe resting on three supports - the reason i am doing this is that the region directly in contact with the support has thinned, so i need to determine the stresses in the thinned section of pipe.

The pipe is simply resting on the supports and is free to move axially (to allow for expansion). This means that i dont want a bonded contact.

I have tried using frictional contact, but this creates a non-linear analysis which wont converge when i apply a force. The analysis runs when i apply a displacement but this isnt simulating what i need.

Does anyone know of a way of simulating this sort of simple support i.e. purely not allowing the pipe to pass through the support!! I am using ANSYS solver.

Thanks in advance. KLT

RE: Simply supported pipe on a support - is this possible?

If there is no restraint to the pipe movement, isn't your problem reduced to the internal pressure problem of the pipe - using the "thinned" wall of the pipe as a limit?  There is a slight weight and moment problem, but that will usually be less than than the internal pressure problem ... unless your sag is very large.   

(Add more margin for additional corrosion.)   

RE: Simply supported pipe on a support - is this possible?

Normally for pipe stress calculations you must have 1 fixed point at which the software starts to calculate. This means that if you need to calculate flexibility you should insert more supports until you find a fixed point. If you are an experienced flexibility calculator you could do without fixed point by assuming one at a point that does not matter nor contribute to your point of interest. I.e. if you have an axial stop somewhere and the next one is a side support, these two may be regarded as a fixed point, if these are not too close to the situation you are inspecting.

RE: Simply supported pipe on a support - is this possible?

I've only used ANSYS in a long while--not since like ANSYS 5.1, but can't you get a solution by fixing just one end--as this will still allow it to be unconstrained axially? Take for example if there was some thermal expansion, the pipe still expands or contracts, it will just do so from one end.  

RE: Simply supported pipe on a support - is this possible?

*edit*

"Haven't" used ANSYS in a long while.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources