×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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!

*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

Unsymmetric Multi Bore Pressure-containing component and how to constrain it?

Unsymmetric Multi Bore Pressure-containing component and how to constrain it?

Unsymmetric Multi Bore Pressure-containing component and how to constrain it?

(OP)
Hi all!

I was wondering if anyone has a good (accurate) technique for constraining an unsymmetric multi bore pressure-containing component?

I've attachted an illustration of a model:

Suppose each bore can be pressurized independantly (load asymmetry). e.g. in one load case two bores have internal pressure, an other load case four bores have internal pressure and so on

The flat surface introduces geometrical asymmetry

I was thinking of using Inertial Relief, but i do not know the theory enough to know exactly what it does.

Any tips and tricks would be appriciated :)

(I've attached a step file of my example component)

Regards
Siggi

RE: Unsymmetric Multi Bore Pressure-containing component and how to constrain it?

You should ask yourself a question how this part is constrained in real life ? If its motion is somehow restricted, you must represent these constraints in the analysis too. Of course some additional boundary conditions may be necessary to avoid rigid body motions in static analysis but the model should represent real life conditions as closely as possible.

RE: Unsymmetric Multi Bore Pressure-containing component and how to constrain it?

The geometry is 2D-symmetric. When material properties and loading follow the same symmetry, then you can use this.

Some more hints on boundary conditions:
- there is a 3-node approach to apply BC on a self-balancing systems
- soft springs can be used
- damping/stabilization can also help

RE: Unsymmetric Multi Bore Pressure-containing component and how to constrain it?

presumably the faces are plate elements, so you could fix 1 node in all 6dof.

There are many ways to restrain the model for rigid body motion. It doesn't matter how you do this, it only affects the plane that the model will displace around.

FEA's post is regarding the physical restraint of the part. If the part cannot displace in a limited number of directions, then the model needs to be restrained the same way.

another day in paradise, or is paradise one day closer ?

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! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close