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


Nodal Solution vs Element Solution

Nodal Solution vs Element Solution

Nodal Solution vs Element Solution

Hey all,
This question might have been asked before but a search didnt bring it up.
Cutting to the chase...
I am doing a detailed analysis on a 18" pipe that we're using as a strut. Prelminary analysis gave me the forces and moments applied on the top of the beam. Now, I'm working on a detailed analysis on the lower end of said strut using shell63 elements. I run the analysis and look at the nodal and element solutions for von Mises. The element solution listing for SEQV top layer for element #1 says 12000 at node i. But I open up nodal solution listing and look at the von Mises there it says only 9000. So basically, my question is this - If the element solution listing says 12000 at node i, shouldnt the nodal solution listing also say 12000? The top and bottom layer results for the element in question are the same at 12000. What am I missing here?
Thx in advance

RE: Nodal Solution vs Element Solution

For a quick check. Try to change increase the mesh density in the region under consideration. And then check that is result of nodal and element result is more close or not.
I hope this give you the right guess.   

RE: Nodal Solution vs Element Solution

Nodal solutions are averaged whereas element solutions are not. Look at the contours, the nodal contours will be nice and continuous between elements, whereas the element contours will be disjointed.
Increase the mesh density until the element contours are continuous as well and the nodal vs element values should then be more or less equal.

RE: Nodal Solution vs Element Solution

Ok guys, thanks for all the replies and apologies for not responding earlier.
Well I took your sugegstions, and yes the solutions do get closer. But as one question is answered, two others come up. Can we safely say that if the nodal solutions are roughly equal to the element solutions, the model solution is converged, or at least close to it?
Next questions, why are element solution results different from those plotted on element table?
Once again, thanks in advance

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!


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