Contact US

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.

Students Click Here

Fatigue in welded structures

Fatigue in welded structures

Fatigue in welded structures


I am referring to BS 7608-1993 standard.
I would like to follow this standard for fabricated structures used in mobile equipments.
In section 3.1, it says the fatigue analysis procedure for welded structures is based on the assumption that only ranges of cyclic stress are considered for evaluating fatigue life i.e. mean stresses are neglected.
But for unwelded parts the mean stress correction is carried out while evaluating fatigue life.

I request the members to explain the why only range is considered for welded structures.
Thanks in advance.

RE: Fatigue in welded structures

Normally the tensile residual stresses are very high at welded connections. Even superimposed with compressive stresses, the resultant stress may still in tension. That's why mean stress is NORMALLY not considered. However, for some cases, mean stress may be considered. See https://fatigue-life.com/welded-structures/ for details.

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! Already a Member? Login


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