×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Non-linear Springs

Non-linear Springs

Non-linear Springs

(OP)
Does anyone know how to force a non-linear spring to unload down a different path i.e. to generate a hysteresis effect.

RE: Non-linear Springs

Idea: Combine two or more nonlinear springs to get the characteristic wanted

RE: Non-linear Springs

(OP)
PamCrash. I'm not sure how this would work. Do you have any example input decks. I've been trying to use a elastic plastic beam in parallel with a spring, without much success.

RE: Non-linear Springs

Sorry, don't have a deck. I'd understand that you need a certain complex spring behaviour between two nodes. The idea was to superpose some nonlinear spring elements to get the desired characteristic.

RE: Non-linear Springs

I am not an ABAQUS expert, but could you use an axial (rod) element with elastic-perfectly plastic material properties. Probably not the most elegant solution, but might work.

RE: Non-linear Springs

(OP)
Thanks bkal. I have since solved the problem with exactly your suggestion and it worked a treat. I also used the cast iron material model to specify a different stress strain curve in tension and compression. A useful technique for the future.

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!


Resources