×
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!

*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

# Buckle analysis - how to describe contact

 Forum Search FAQs Links MVPs

## Buckle analysis - how to describe contact

(OP)
Hello.
I have been using ABAQUS CAE for mechanical analysis at college. I have come to a problem.
I have a two-axis testing subject which we want to control using linear perturbation -> buckling, so we get first 10 eigen values. The subject is supported (fixed) on two ends and load is applied as pressure to two end surfaces (shown on picture).

[img https://res.cloudinary.com/engineering-com/image/upload/v1604327014/tips/forum_3_t12b2o.png]

So we get several eigenvalues (the first one is shown on the picture) and the problem, that i am facing is that i can't specify that the subject item can only bend (buckle) or deform only to the limit of these plates on each side. The goal is to display tension that occurs because of this block/plate. The static analysis is supposed to be made as general static analysis by Riks in abaqus. I know, that the eigenvalue that i get is supposed to be used as load in static analysis step, but i have hard time understanding, why does the test subject goes straight through plates.

[img https://res.cloudinary.com/engineering-com/image/upload/v1604327000/tips/forum_1_q9jauz.png]

Test subject and plates are around 0.5 mm apart (they are not in contact in initial conditions). I have tried using interactions but it doesn't work or at least not the way i expected.

[img https://res.cloudinary.com/engineering-com/image/upload/v1604327035/tips/forum_2_avkzww.png]

Thank you for your help.
Replies continue below

### RE: Buckle analysis - how to describe contact

(OP)
Photos are sorted chronologically as they were referred in first post.

Photo 1

Photo 2

Photo 3

#### 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

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:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!

Already a member? Close this window and log in.