Contact US

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

Rigid Movements

Rigid Movements

Rigid Movements

Hi all,
Imagine have two plates are in contact and they're connected through bolts. The top plate is much stiffer than the bottom one.

At the bottom of the bottom plate there is a force applied vertically. Due to the presence of the top plate, the bottom will probably rigidly tilt but never bend.

Question: how can I simulate the stiffening effect of the top plate without actually use a top plate (saving elements and time)? I thought about use RBE but I'm not sure it's possible.

Hope the question is clear.
Thank you

RE: Rigid Movements

If the difference in stiffness is large then you could model the top plate as rigid. This way you still have its geometry but the computational effort is much lower.

RE: Rigid Movements

I could. Should I glue the two plates? No sure if that would be too conservative. I don't see other ways though

RE: Rigid Movements

I would define contact between these two plates in such a case. The analysis shouldn't take long with the top plate modeled as rigid.

RE: Rigid Movements

where are the loadpaths ? Is the load coming into the lower plate and out to the "rest of the world" ? or into the lower plate transferred to the upper plate and then to the "rest of the world" ? If you're saying the upper plate is "just" hanging onto the lower plate (like a parasite) without any connection to the "Rest of the world" then how much load will it attract ? What's the loadpath out of the upper plate ? contact with the lower ??

another day in paradise, or is paradise one day closer ?

RE: Rigid Movements

Please add a picture of the entire structure; the described case makes no sense.
And why worry about saving elements? (that was a problem in the 70s-90s, not today)
And don’t use rigid elements; they don’t represent reality.

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


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