×
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

Simulation of a screw does not converge in Ansys

Simulation of a screw does not converge in Ansys

Simulation of a screw does not converge in Ansys

(OP)
I've been having some convergence issues in my simulation.

I'm simulating a screw, in which an axial force is applied. The stresses keep rising as I refine the mesh.

I've tryied using a bi-linear material to account for material hardening.

I am using 1/4 of the geometry due to the fact that there is a symmetry, and I'm using student software.

In my university I have access to non-limited ANSYS software.

Attached is my simulation.

Any heads up?

RE: Simulation of a screw does not converge in Ansys

Hi there,
please post all your informations you have! Not only that the simulation not converged. What's the purpose of your simulation? What do you expect of the simulation? Did you try hand calculation in the first place?

Back to your questions/sentences.
What's the problem with the simulation? It stopped at specific time step or not converged at all? How do boundary conditions look like? Do the dimensions of the model correspond with applied force? Do you check your material data?

Look at the mesh sensitivity study about your question of the stress rising with mesh density. Try to start with simple linear model. If it works then do other changes. You can use axisymmetric model in your case.

I cannot use your attached file due the ANSYS version differences (I'm using ANSYS 2020 R1).

Best regards
JK

RE: Simulation of a screw does not converge in Ansys

I agree with the axisymmetric model; less contact issues and will solve quicker. You could also use the ANSYS Threaded contact formulation on a smooth cylinder and hole.

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


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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