×
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

Slab expansion and contraction due to temperature cycles

Slab expansion and contraction due to temperature cycles

Slab expansion and contraction due to temperature cycles

(OP)
Hello everyone,

I want to model slab expansion and contraction due to temperature cycles. Three slabs are assigned as a row and are "hard contact" with each other. They are restrained by a rigid, fixed trilateral constraint so that they can only expand in negative X direction but contract in XY plane. The contact between trilateral constraint and slabs is also "hard contact". There is friction between the top of ground and bottom of slabs.

I wish to see openings between the slabs and trilateral constraint after temperature increases and decreases even if the increment and decrement are the same. When temperature increases, the inside two slabs will push the outer slab to outside, so the center position of each slab will be changed. When temperature decreases, three slabs will contract toward their own centers, so opening will appear. However, I cannot get the openings in my model.

In my model, I use static, general analysis. The temperature is defined in predefined field (initial=-5, step1=15, step2=-5). Gravity is applied in step1 and propagates to step2. The contact between ground and slabs are surface-to-surface contact (friction penalty and hard contact). The contact between slabs and constraint, between slabs are general contact (hard contact).

Can anyone help me figure out what is the problem in my model? Why can't I get the openings? Thank you very much.

Sincerely,
Chuanyue

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