×
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

symmetric model generation

symmetric model generation

symmetric model generation

(OP)
My problem is about the modeling in 3-D when I revolve my 2-D plane about the symmetry axis. I use the *symmetric model generation command.  The program create duplicate node and element by offset the numbering. The problem is  along the symmetry axis. Program recognize nodes at the axis to be the same and doesn't offset the node in the node information, however it does offset the node number in the element connectivity data. Therefore node number using in the element connectivity data doesn't exist in node definition and I would like to ask you for any algolithm to change this number to the node number along the symmetry axis.

RE: symmetric model generation

It sounds like you have a bad program with a bug in it. Some programs have a merge facility in them so that near/conincident nodes are merged out and the element connectivity is modified accordingly. This probably wouldn't work in your case as your nodes have been merged but the element connectivity hasn't been altered. This is probably because you have wedge shaped elements in the centre but the program thinks you have brick elements and leaves the node numbers intact although they don't exist in the node definitions. As the program is unable to create wedges then alternatives might be to leave a hole in the centre of the model that you can later fill with wedge elements yourself, or create the shape first then mesh it, rather than trying to sweep a mesh into a 3D shape. The program should be able to mesh 3D solids with brick elements throughout.

RE: symmetric model generation

If you were using the ABAQUS pre processor, this would not be a problem, but, if you intend to use symmetric results transfer, then this needs to work.  

This may be a bug, if so, I am sure your local support office would like to get a hold of your input deck so that it could be tested and passed to the developers for correction.  In general, anything that worked in 6.2 had better work in 6.3, or it needs to be corrected.  You'll find ABAQUS very serious about getting these type of bugs corrected.

Best regards and good luck!

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