×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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

Very different displacements in Linear and Non-Linear Analysis

thread824-372096

Very different displacements in Linear and Non-Linear Analysis

Very different displacements in Linear and Non-Linear Analysis

(OP)
Hi all,

I am using the Marc solution (SOL 600) for solving a contact between two cylindrical pieces (one inside the other) but I've obtained a very different result in "Rotational Displacements" that when I used the Linear Solver (without contact).

I tried to deactivate contact zones and ease the model but nothing has changed.

The load is applied to the inside piece through CBEAM elements because it is generated due to inertia loads and I must put it in the CoG of the model. Being under this load, this piece displaces respect to the other one causing a collision that is what I want to study.

I've also tried to change CBEAM orientation but nothing... I don't know what to do

Thank you very much in advance.

RE: Very different displacements in Linear and Non-Linear Analysis

Not sure about your question. Results without contact is different from results with contact. That sounds reasonable to me.

RE: Very different displacements in Linear and Non-Linear Analysis

(OP)
Thanks for answering.

Sorry for my bad explanation, I meant that the real load case involves a contact, but the inner piece rotates before contact the other one, and this rotation is which is different between linear and non-linear.

What I did to make the analysis easier was to delete the contact and therefore I could run both analysis (linear and non-linear) to compare them.

To sum up: I run two analysis without contact, and the results are different.

Thanks.

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