×
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

Fracture Mechanics - Stress Intensity Factors
2

Fracture Mechanics - Stress Intensity Factors

Fracture Mechanics - Stress Intensity Factors

(OP)
Hello All,

   I was wondering if anyone had a good source for where I could find stress intensity factors for a tube (similar to a pipe) loaded in bending.

   I have a tube which failed for me and I noticed that it was initiated by fatigue failure. Fatigue failure produced a flaw within the tube and it eventually failed from overload.  I'm curious what the final force was that caused it to finally rupture.

   I'm thinking I could use Fracture Mechanics for this.. K = Y(Sigma)root(PIa) or something similar.. but I need to know that Y term..

 Any ideas, and any comments regarding my methodology would be much appreciated. Thanks!

RE: Fracture Mechanics - Stress Intensity Factors

stress intensity factors ... Rooke and Cartwright is a good place to start (it's like petersen is for stress concentrations).
to determine the load causing failure, you'll also need the material toughness (Kc, possibly KIc if the tube is very thick).  i suspect too that you've got a complex loading (pressure in the tube, bending, ...) and possibly temperature effects ... this isn't going to be a simple exercise ... good luck !

RE: Fracture Mechanics - Stress Intensity Factors

In order to achieve your goal you are going to have to work backwards through an engineering critical assessment process such as that outlined in British Standard 7910.  If your interest is purely personal, you may find yourself giving up some way in!!

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04
 

RE: Fracture Mechanics - Stress Intensity Factors

(OP)
Thank you all for your generous information!

I will definitely look through all of the resources you've provided!

Thanks!

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