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

How do I add contact surfaces for a transient dynamic analysis

How do I add contact surfaces for a transient dynamic analysis

How do I add contact surfaces for a transient dynamic analysis

I'm doing a transient analysis with an acceleration input. However my model contains many segregated portions that are held together w/ pins and latches. I'm not sure how to set up contact surfaces without having a 3d mesh. I've got tubes joining in a T that are both modeled with plate elements due to the computational needs. That T is held w/ a latch and block that keeps the vertical tube of the T from moving in the x,y direction. The block is bolted to the horizontal tube. The two tubes are held together with a latch that's bolted to the horizontal tube and held with a hook on the vertical tube.

Right now I've got an RBE 2 with the master node on the bolt hole and the slave nodes attached to the ends of the vertical tube that touch the horizontal tube. The theory is that we can get the forces on the rigid and then weigh that against the latch design strength and bolt shear.

My fear is that this becomes too stiff and won't give accurate results. Therefore I was thinking I could use contact surfaces but the only way I know how to do this is with solids which causes my model to be so large it crashes. Is there a way to tell two plates coming together that they can separate but "You shall not pass!" for an NX Nastran transient dynamic analysis?

RE: How do I add contact surfaces for a transient dynamic analysis


Have you tried the surface to surface and edge to surface contact capabilities in Femap?

Seifeddine Naffoussi, Stress Engineer

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


White Paper - Strategies to Secure Connected Cars with Firewalls
White-hat hackers have demonstrated gaining remote access to dashboard functions and transmissions of connected vehicles. That makes a firewall a vital component of a multilayered approach to vehicle security as well as overall vehicle safety and reliability. Learn strategies to secure with firewalls. Download Now
White Paper - Model Based Engineering for Wire Harness Manufacturing
As complexity rises, current harness manufacturing methods are struggling to keep pace due to manual data exchanges and the inability to capture tribal knowledge. A model-based wire harness manufacturing engineering flow automates data exchange and captures tribal knowledge through design rules to help harness manufacturers improve harness quality and boost efficiency. Download Now
White Paper - What is Generative Design and Why Do You Need It?
Engineers are being asked to produce more sophisticated designs under a perfect storm of complexity, cost, and change management pressures. Generative design empowers automotive design teams to navigate this storm by employing automation, data re-use and synchronization, and framing design in the context of a full vehicle platform. Download Now
eBook - Simulation-Driven Design with SOLIDWORKS
Simulation-driven design can reduce the time and cost of product development. In this engineering.com eBook, we’ll explore how SOLIDWORKS users can access simulation-driven design through the SOLIDWORKS Simulation suite of analysis tools. 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