×
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

I'm lost! Help me meshing this

I'm lost! Help me meshing this

RE: I'm lost! Help me meshing this

Why not to use free mesh instead of maped. Ouput will be the same.
And delete diagonals to get quad element at corner.

RE: I'm lost! Help me meshing this

I don’t use Nastran but meshing strategy should be the same in all programs. Try meshing this with square partition around the hole.

RE: I'm lost! Help me meshing this

This is what I would do.
  1. Create 8 outer solids and 8 inner solids of the cylinder. Each solid should be separate and the edges must be aligned. See the attached image.
  2. Mesh the top surfaces with 2D elements as you are doing.
  3. Sweep the mesh through the thickness to build your 3D HEX elements.
  4. Perform an equivalence to remove duplicate nodes.
I suspect the trouble is coming from the inner cylinder solid(s). As I see in your image, the blue edges of the inner solid are not aligning with the edges of the outer solids. As you mesh the surfaces, you probably end up finding the meshes are not lining up.

RE: I'm lost! Help me meshing this

Here is another variant.

RE: I'm lost! Help me meshing this

You don't say what pre-processing software you are using to make the mesh, but if you were using Patran I would use the Paver or Hybrid option to mesh the top surfaces of that solid with quad elements, then extrude the quad elements down to create hex elements. Then, delete the quad elements (since you won't need them). You should get a useable hex mesh using that approach.

RE: I'm lost! Help me meshing this

(OP)
THank you all for your kind answer, I was able to finally split the geometry but still keep the mesh seed equal for geometries. Yes, I use Patran

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

eBook - Mastering Tolerances for Machined Parts
When making CNC machined parts, mastering tolerances can be challenging. Are general tolerances good enough? When does it make sense to call out for tighter tolerances? Do you need a better understanding of fits, datums, or GD&T? Learn about these topics and more in Xometry's new e-book. Download Now
eBook – How to Choose the Correct Corrosion Testing Method
When designing a metal component, engineers have to consider how susceptible certain alloys are to corrosion in the final product’s operating environment. In a recent study by NACE (National Association of Corrosion Engineers), it was estimated that the direct and indirect costs of corrosion in the United States is approximately 6.2% of the GDP. In 2016, that cost exceeded $1 trillion dollars for the first time. Download Now

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