Contact US

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

Deviation of crack

Deviation of crack

Deviation of crack

Dear all,

I have to model a plate with a whole and a crack that start from the edge of the plate. How can I see how the crack is going to deviate?
From assembly-crack-I can modified the q vector that is the direction of the crack but how can I get the right direction?


RE: Deviation of crack

You have to request a CONTOUR INTEGRAL computation.

for example, keyword version:
For details read:

ABAQUS Analysis User's Manual   -> 11.4.2 Contour integral evaluation

In ABAQUS/CAE, you have to create a History Output Request in Step Module.

RE: Deviation of crack

hi xerf,

but if I moove the crack in the next step towards the new direction how can I see the parabolic path of the crack?
Since now I dealt with linear path propagation but if have to make the deviation how can I be in the parabolic trajectory of the crack?


RE: Deviation of crack

I am not sure I understand what you're trying to do.

In ABAQUS simulation of crack propagation (if that's what you're talking about) are quite limited and occurs through debonding of previously tied surfaces. Therefore the crack "propagates" along a known path.

q vector describes the virtual crack extension direction which is used for computing stress intensity factors, not the crack propagation.

RE: Deviation of crack


yes what I'm trying to do is the crack propagation.
To model this I was thinking to make different analysis with different mesh all the time but that will take me ages, even with fortran I could do an iterative procedure in order to remesh again from the input file but still is going to be a big effort.
Do you think debondig will be more fast?
Do you have any idea about it?


RE: Deviation of crack

If you are interested in simulating crack propagation you should look at different codes, e.g. Zencrack, FRANC2D / 3D.

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close