×
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

Tied boundary condition

Tied boundary condition

Tied boundary condition

(OP)
Hi,

I met some weired thing:  I specified tied boundary condition between two surfaces.  Initially, the slave nodes are aligned with the master rigid body surface, but after a while, the nodes are no longer tied, as I can see from the displacement calculations.  Can you tell me why?  Is there any default value set in abaqus that specifies when the tied boundary condition will be broken?  Thanks!

RE: Tied boundary condition

Tied nodes simply have their degrees of freedom equated to the opposite surface. If the nodes are not in perfect alignment then an interpolation is used between the surfaces. Sometimes a displaced shape that has been factored up to show the distortion can be misleading. Check the values calculated at both surfaces.  

corus

RE: Tied boundary condition

jisb007,
Did you use the TIED option of *CONTACT PAIR?
MRG

RE: Tied boundary condition

(OP)
Thanks both!

I am running abaqus V6.4-4 -- *Contact pair, TIED option is no longer supported and suggested to use *TIED option to specify the BC before the history portion of the input file.  

I am re-run the model using V6.3-1 now, and this time using *contact pair, tied option.  I'll see how it goes and will let you know.  Thanks very much!

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