×
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

Tube dynamic dent/crush equation?

Tube dynamic dent/crush equation?

Tube dynamic dent/crush equation?

(OP)
I'm working with structural metal tubing (of an elongated octagonal cross section (height is about 17% taller than width) that's subject to high enough radial impacts (generally with another tube of similar size and strength) to cause both denting (generally on the edges), usually only small dents but occasionally enough to cause actual bending of the tubing.  The tubes are basically cantilevered, with negligible axial load and usually low bending loads (which can be neglected in most cases).

We're looking at a good way to compare these materials for dent resistance under these high-dynamic loads (generally high speed/low mass impacts), without having to go through tooling and sampling.

Is there an equation (even for cylindrical tubing) that approximates resistance to this kind of dynamic denting? I've found plenty on panel denting, and axial crushing, but nothing so far on radial denting. I'm aware that it has relations to hardness, yield strength, and wall thickness, but can't find the relation and don't have the equipment to do the testing to derive it.

We're also looking at fibrous composites, but I'm not even going to try to derive that one - just a weeeee bit nonlinear!

Cheers!

RE: Tube dynamic dent/crush equation?

(OP)
In addition - does anyone have any good books to recommend for this type of info, especially given various cross sections and strain rates?

Cheers!

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