×
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

Nodal forces and Von-mises stress

Nodal forces and Von-mises stress

Nodal forces and Von-mises stress

(OP)
Hi,

I am trying to analyze welds in ansys by modeling the weld as couplings (in a shell model) and postprocessing the data in an excel file to calculate stresses in the weld

In the post processing, I select each node (from a set of coupling having 2 nodes, I select one node) and write out the Forces (Fx, Fy and Fz) on the node.

So I have a text file which has node numbers with location and forces Fx, Fy and Fz at the node.

Now using these forces at each node, I analyze what forces would cause shear in the weld and what force will cause tension/compression. The mesh is uniform at the couplings meaning that the element length is same throughout which means when I calculate the stress I use the force and divide it by length of element and throat of weld.

I find the shear stress (tau1 and tau2) - two directions causing shear of weld, and a normal stress (sigma) in the third direction.

Now to get the Von-mises stress, I use the formula sqrt [sigma^2+3*(tau1^2+tau2^2)] and compare with yield strength whereas I compare shear stress with the sy/sqrt(3) (0.57Sy).

Is the approach reasonable??

Shiraz
Sr. Engineer

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