×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Most Critical M & N Couple for SLS Analyses

Most Critical M & N Couple for SLS Analyses

Most Critical M & N Couple for SLS Analyses

(OP)
Hi!
My problem is, in my opinion, should be very common, but have not seen many posts.
I have a shell and with most software, I can get an envelope of results along many load combinations. The structure I am working on is mostly governed by SLS (Crack Width). So, I go in and get the shell results envelope and get the minimum axial force with its corresponding bending moment and maximum bending moment with its corresponding axial force. However, these MN couples do not govern the SLS analyses, values in-between these two edges govern. I have shown this in the following figure. The orange line is capacity for given crack width criteria. As you can see edges do not govern.
So, I am trying to find a way to simplify the selection of "design couples". I have tried M/W+N/A, it also doesn't work. Does everybody just go and get the maximum and minimum? (Please don't comment on the "reliability of crack width calculations is very low so why bother" etc. I am trying to find the correct way to reach most critical value.)

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



News


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