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.

Jobs

Can anyone think of a way of setting up a Beck's column?

Can anyone think of a way of setting up a Beck's column?

(OP)
Hi all,

I am studying the dynamic instability and post-critical wave-like oscilation of Beck's column. I want to get some experimental results to compare to the analytical solution.

A Beck's column is simply a cantilever beam with a tangential follower force at the tip.

One experiment we have done was using rubber tube (like garden hose). The water jet coming out of the tubing is equivalent to a follower force. There should be a critical load or critical volume flow rate where the tube becomes unstable, and that value compares well with the theoretical value.

Now we want to set up the experiment in another way so that the follower force is more "controllable" -- it was just a rough estimate to relate volumetric flow rate and force magnitude, plus we want to have the follower force acting on a real beam or slender rod.

One way we have come up with is using wires and magnets, but it's tougher than expected to set it up such that the force is always tangential to the beam.

So this is more of a thread looking for ideas rather than solving problems. We have some budget so please do not limit your imagination within what I've mentioned.

Thanks

RE: Can anyone think of a way of setting up a Beck's column?

To be honest your original solution was so neat I don't think you'll better it! I assume you need a dynamic system, that maintains constant force, but varying direction, as the column buckles?

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?

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


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