×
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

Cohesive Analysis with Abaqus/Explicit

Cohesive Analysis with Abaqus/Explicit

Cohesive Analysis with Abaqus/Explicit

(OP)
Hello all,

I’m trying to model composite delamination under non-severe impact on layered composites in ABAQUS/Explicit.

To begin with, I’ve modeled a 2D aluminum with a finite very low thickness cohesive layer with traction-separation behavior between. Then, I give some displacement to the middle-top node to simulate an impact scenario. However, even in this simple configuration, I’m having stress distribution problems when the models with cohesive layer between and without cohesive layer are compared.

The problem is, I’m having some ridiculous stress distribution and meaningless bubbles when I model with cohesive elements, at the beginning of the step. I’m also having different stress outputs for the cases with and without cohesive layer.

I noticed that the stress output result varies with:

Cohesive layer in-plane thickness
Cohesive layer density
Cohesive layer penalty stiffness (Knn, Kss, Ktt)

From what I’ve read from literature, the common belief is using default thickness, very low density and very high penalty stiffness for those fields. However, with any try with those values, I couldn’t get meaningful results.

Here's my input file for the cohesive & non-cohesive cases and the pictures of the problem I’m experiencing: https://www.dropbox.com/sh/igpidoms47xdvf4/MGHg3Gi...

Thanks in advance.

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