×
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

CONTACT Problem

CONTACT Problem

CONTACT Problem

(OP)
HI,
I have some problem when modeling contact with TARGE69 and CONTA175. Target elements are penetrating too much the contact elements when using keyopt(2)=1 (penalty algorithm).
Any suggestion to solve the problem?
Thanks.
Lyes

RE: CONTACT Problem

Try to back off on the loads--do the bodies penetrate for really small loads?

Also, I don't know your particular contact algorithm, but I can guess a similar approach is used with this one--many contact algorithms allow the Target to penetrate the Contact Body, but won't allow the Contact Body to penetrate the Target (or vice versa).

RE: CONTACT Problem

The commercial FEA code will re-mesh according to the default criteria or the overlapping limits set by users. You also should be asked before which one is rigid and which one is deformable. Tighter criteria will limit penetration too much, but on the other hand will increase iteration/solution time should be set very carefully.

RE: CONTACT Problem

Hi,

Maybe if you try Augmented Lagrange algorithm for the contact it can work.

RE: CONTACT Problem

Hello,

I am with kemechial, Lagrange could work better. But if the Penalty-Method is mandatory, I would increase the contact stiffness and decrease the step time.

Regards
Alex

RE: CONTACT Problem

I agree w/ the two previous posters.  Also, try creating symmetric contact if those two suggestions don't work.  The Augmented Lagrange algorithm is very good however and should solve your issue.

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