×
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

NDT testing for 1" diameter smooth bent bar

NDT testing for 1" diameter smooth bent bar

NDT testing for 1" diameter smooth bent bar

(OP)
Could anyone make a suggestion on what kind of NDT testing can be performed on 1" diameter smooth bent bar. The purpose is to detect any stress crack at the bent due to the tight bent radius. These bars have been installed to the concrete as the ladder rungs. Thanks.

RE: NDT testing for 1" diameter smooth bent bar

high frequency eddy current
or more simple ... LPI

depends on what length of crack you want to detect.

maybe even Xray

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

RE: NDT testing for 1" diameter smooth bent bar

mag particle or dye pen should be OK, too.

Dik

RE: NDT testing for 1" diameter smooth bent bar

Well, it is OK to NDE the bent bar, but I question the "tight bend radius" as the likely point of cracking: The highest tensile stress is on the outside of the bend, not the inside. The inside (introdent) will compress and squeeze so the bar's radius deforms (gets bigger).

Now, a hollow bar will deform in as it bends, and tend to compress (crumple) the OD and kink the ID. But a smooth bar (for rebar ??) will not likely show problems on the inside of the bend.

RE: NDT testing for 1" diameter smooth bent bar

It seems unlikely that a 1" bar, no matter what or how the deformation, will not perform satisfactorily as a ladder rung.

Yes, I know. That's a double negative.

RE: NDT testing for 1" diameter smooth bent bar

Quickest and easiest is liquid penetrant inspection as both rb1957 and dik noted. It is not expensive, results are relatively immediate and it will detect surface cracks reasonably well.

Magnetic particle inspection would be the second choice. More expensive, more equipment, more operator training....but fast results!

Eddy current would be next, but has the same issues as MPI.

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