×
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

Abaqus spring vs connector elements

Abaqus spring vs connector elements

Abaqus spring vs connector elements

(OP)
Hi. I am trying to simulate a metallic frame, with a board of OSB connected to it by metallic fasteners.

I have done two different models:
First model: I used spring elements with linear behavior, with three degrees of freedom (translational directions at each node). I gave a high stiffness in order to consider the springs rigid.
Second model: I used connector elements with linear behavior, with type Cartesian (just to have translational CORM), and considering elasticity rigid.

When I observed the results for each model, I observed that in the second model (with connectors) I had displacements in the Z direction (out of plane displacement), like a twist of the panel (rotated around a vertical axis). Because I am applying only a horizontal force on the top of the metallic frame (not in the panel), I am not understanding why this happen.

With the spring elements the model behaves like it should, but I want to simulate nonlinear behavior of the spring, and for now I don’t know how to do it…I read the abaqus user manual, and made an input file, in order to insert the nonlinear behavior, but is not working. Does anyone knows how to put this in the input file correctly?

What I did, for the first degree of freedom, was: (excerpt of the input file)

*Spring,elset=Springs-1-spring
1, 1
*Nonlinear
0, 0
700, 0.001
900, 0.002
1010, 0.003
1040, 0.004
1150, 0.005
1200, 0.01
1100, 0.015

*Element, type=Spring2, elset=Springs-1-spring
1, OSB-1.21, Frame-1.13
2, OSB-1.18, Frame-1.14
3, OSB-1.15, Frame-1.15
4, OSB-1.12, Frame-1.16
5, OSB-1.9, Frame-1.17
6, OSB-1.3, Frame-1.18
7, OSB-1.2, Frame-1.19


Many thanks.

Regards,
Ricardo Dias.

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