×
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

CONVERGENCE PROBLEM

CONVERGENCE PROBLEM

(OP)
Hi,
    I am new to Ansys and am doing a contact non-linear analysis. The model has five contact surfaces and I cannot get the solution to converge. The analysis is a static analysis. Any ideas or advice would be most welcome as I have been trying to get a solution for a few days now.   

RE: CONVERGENCE PROBLEM

Rather than having everyone write down every little thing they know about contact it'd be better if you could explain your model.  Even better - post a picture of it!  Contact is something that most people struggle with using at first but once you figure it out Ansys is pretty good at it.

I'd also suggest finding some examples online or in the help to guide you.

RE: CONVERGENCE PROBLEM

(OP)
Thanks Stringmaker for the reply. My problem is that when I change from a thermal analysis to a structural one to include the thermal distribution as the input (after changing element types etc)I have problem acheiving convergence. The main problem is that their is are elements between two sets of contact surfaces which moves significantly (according to the program) (i.e. rigid body motion) even though one end of the area is constrained. It's as if the area is constantly getting longer. I have even tried placing a constraint at the other end of the area which does not seem to prevent the displacement.

Any suggestions ?

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