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


Fracture Mechanics using the Ansys Finite Element Method

Fracture Mechanics using the Ansys Finite Element Method

Fracture Mechanics using the Ansys Finite Element Method

Hello!! :)

Doubt regarding the results of a simulation using the Finite Element Method in Ansys. I will try to detail
everything I've done.

OBJECTIVE: To compare the results obtained by the experimental technique (photoelasticity, using the Superdeterministic Method - Dally and Riley): determination of KI (stress intensity coefficient at the tip of a crack in a thin plate, with crack in mode 1).

Results obtained by finite element simulation on Ansys
Software, Workbench, Release 19.0:

Main question: In the Ansys simulation, the KI only converged to a satisfactory result (very close to the KI calculated by the photoelasticity) when the analysis is done only at the beginning of the crack (and not along the crack length). Can anyone tell me why this happens?
In the software option to put the points to be analyzed, it passes from 1 to 6 (1 at the crack end and 6 at the base of the plate, but also in the trench along its length). When selected to simulate 1 to 6, or 1 to 5, etc ... the KI results are quite different from those obtained in the experimental technique (photoelasticity). I do not know if it makes a mean of the "KI's" obtained in each point and there it returns the greater or lesser value or it is done by another method. When I put it to simulate only 1 to 1 (ie, only at the crack tip), the result converges to the value obtained experimentally.
I performed the simulation on ANSYS based on the concept of the State Plan of Tensions.

So can anyone help me understand why KI only converges to a satisfactory result when the analysis is done only at the beginning of the crack (and not at all in the crack size)?


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


White Paper - Considerations for choosing a 3D printing technology
The adoption of 3D printing into major companies’ product development life cycles is a testament to the technology’s incredible benefits to consumers, designers, engineers and manufacturers. While traditional production methods have limitations in manufacturability, 3D printing provides unparalleled design freedom due to the additive method of building parts layer by layer. 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