×
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

4130 CM Tubing

4130 CM Tubing

4130 CM Tubing

(OP)
landspeed(electrical) My first post!Hope somebody can help me?What would be the formula for comparing the yield strength of CM tube say 1.625 X .093.To a tube of 1.750 X .120 ?Both being the same length.Thanks Rich

RE: 4130 CM Tubing

Assuming same material - the yield strength is the same - BUT since they are of different sizes the Moment of Inertia and Section Modulus are different and the overall strength is in favor of the larger section.

What kind of load - point load or distributed load??

S (section modulus) = bd^2/6 - bd^2/6 - take the outer section and subtract the inner (hollow section)-assuming square tube.  You look up round tube in any good engineering book.

Moment = S x Fy (yield allowable - psi)

M = P L /4  Point Load
M = w L^2 /4    Distributed

Watch units!!!  - work in inches, in-lbs, psi, lbs/inch, etc.

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