×
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

convergence problem with contact analysis

convergence problem with contact analysis

convergence problem with contact analysis

(OP)
Dear all,

I have some convergence problem with a contact analysis. I run the model of a quarter of the plate applying a cyclic load for each node. After one cycle I release the node from its symmetry and I apply the cycle at the following node.  I put an analytical surface in the symmetry line in order to avoid the overclosure due to a plastic wake which has been formed after applying several cycles. This model run fine but when I input initial residual stress by using the SIGINI subroutine I have some convergence problems. The contact model that I used is a hard contact type between rigid elements made by an analytical surface and a seris of nodes.
In attached there is the msg file.

Do you have any idea on whch could the problem be?

thanks in advance

Albert

RE: convergence problem with contact analysis

(OP)
Dear all,

I tried to use an hard modified contact interaction property, but the error persists and is the "Severe discontinuity iteration". According to the contact algorithm in 12.4.5 of the ABAQUS docomentation if there are changes in contact then it does not even check the equilibrium.
Is there anybody who can give me some suggestion?

Thanks a lot,
Albert

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