×
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

Patran Results: Shell Force, Force Resultant - von Mises quantity vs. force magnitude?

Patran Results: Shell Force, Force Resultant - von Mises quantity vs. force magnitude?

Patran Results: Shell Force, Force Resultant - von Mises quantity vs. force magnitude?

(OP)
Hello,

If the title is confusing, let me explain. I'm trying to extract loads from a Patran shell model in the x and y directions. I could just separately extract the x and y components of the shell forces, but I noticed there is a quantity called "von Mises". I know that von Mises stress is a yield failure criteria, but is the von Mises shell force the magnitude/resultant? And if yes, then can I just extract it and resolve it into its x and y components?

Thanks

RE: Patran Results: Shell Force, Force Resultant - von Mises quantity vs. force magnitude?

Von Mises stress is equivalent stress calculated from stress tensor components. You can also extract those components individually. But if you need forces then you have to stick with their output variables.

RE: Patran Results: Shell Force, Force Resultant - von Mises quantity vs. force magnitude?

(OP)
Thanks FEA way, but does this also apply to shell forces? What is a Von Mises "Force" extracted from a shell element?

RE: Patran Results: Shell Force, Force Resultant - von Mises quantity vs. force magnitude?

I’ve never seen such variable in FEA software. Check Patran’s documentation, it should explain how this quantity is calculated.

RE: Patran Results: Shell Force, Force Resultant - von Mises quantity vs. force magnitude?

I suspect it is von mises stress * thickness = force per unit width (like the normal forces).

What is it in reality ? don't know, von mises is a combination of principal stresses. Principal loads would make more sense.

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

RE: Patran Results: Shell Force, Force Resultant - von Mises quantity vs. force magnitude?

This variable look strange. Von-Mises stress don't have a direction, if you multiply it by surface area you don't get force because you need vector stress value, not scallar.

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