×
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!

*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

Automatic contact generation

Automatic contact generation

Automatic contact generation

(OP)
Hi,

I'm working with Abaqus in a model with many different parts, so there are many contact interactions. But manually defining all the master-slave pairs is tedious, and inefficient, so I'm looking for a  faster (and easier) way. Any help is really appreciated.

Thanks

RE: Automatic contact generation

Hi

If your model is 3D in ABAQUS/Explicit, you could look at using general contact.  If not, I think you will be stuck with defining contact pairs.

Regards

Martin

RE: Automatic contact generation

(OP)
Hi bassmanjax (Martin),

thanks for your info.

And yes, my model is 3D. But although I tried, I can't make my model works. I'm using CAE to enter the data, and when defining contacts, I use "general contact" as you explained (option says "Explicit only"). But when I try to submit it, a message like "only for Abaqus/Explicit" appears. But that's what I'm doing!!, I suppose. Reading the User's Manual or the CAe Manual wasn't helpful either.

I think that is a simple problem, but I can't get it. Any help will be really appreciated.

Thanks.

RE: Automatic contact generation

Change the type of analysis in the step module

corus

RE: Automatic contact generation

(OP)
Thanks to both, very helpful tips. My model is running now. The only problem is that it takes a lot of time to be completed, but I suppose there's something bad in the analysis adjustments(step length, duration, etc). Hope that find the answer soon.

Thanks again.

RE: Automatic contact generation

Hi

Check the length of your time step - you can do quasi-static analysis with Explicit with quite short time steps.  For metal forming models, I've used time steps of between 0.01-0.1 sec depending on the job.

You should also look up mass scaling in the docs.  Used carefully, it will help to speed up the computation time.  The tradeoff with mass scaling is knowing how much is acceptable - too much mass scaling and your model is meaningless.

If you're new to ABAQUS/Explicit, I'd strongly reccomend taking the time to leaf through the appropriate manual sections aswell.

Good luck!

Martin

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! Already a Member? Login


Resources

eBook - The Future of Product Development is Here
Looking to make the design and manufacturing of your products more agile? For engineering and manufacturing organizations, the need for digital transformation of product development processes just became more urgent than ever so we wanted to share an eBook that will help you build a practical roadmap for your journey. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close