Learning Forum

[fan134]

My 3D static structural model consists of three bodies (as shown in the attached figure): the innermost body is the casing, the outermost body is the rock, and the cement is positioned between them. When I try to create a semi-elliptical fracture on the inner or outer face of the cement—located at the casing–cement or cement–rock interface, respectively—meshing failure occurs. The software only allows me to define a fracture on the top or bottom face of the cement body, and even then, not exactly at the edge of the cement.

I would greatly appreciate any suggestions or guidance on how to resolve this issue.

 

[Akshay Singh]

 

Hey,

Please ensure that you are using the correct orientation and location of co-ordinates that you are using to define the crack.
Also, do not try to define the crack at a shared surface that may lead to errors.
 I was able to create 2 semi elliptical cracks using tetrahedron meshon the outer and inner faces on the middle portion as explained by you.
It would be better if you could share some more images of where you are creating the crack and crack details.

Kinldy go through the following document for better understanding fracture meshing:5.5.3. Fracture Meshing

 

 

[fan134]

Hi Akshay,

Thank you so much for your reply. The orientation and coordinates are not the issue. I was also using the tetrahedron mesh. Since I created a "part" with all the bodies in the geometry, as you mentioned, the issue could be related to shared topology. The faces where I want to create the fracture are shared.

Do you think changing the shared topology method from "Automatic" to "None" in DesignModeler might help?

If you don’t mind, could you please share your file with me at fan134@uregina.ca? I’d just like to take a look.

Best regards,
Faysal

[surprised.grasshopper.kgmn]

Great discussion on fracture meshing failures at interfaces! It's crucial to avoid defining cracks exactly on shared surfaces to prevent mesh errors, as Akshay noted. Also, try adjusting the shared topology settings in DesignModeler-as fan134 suggested-to "None" instead of "Automatic." For practical testing and visualization of fracture behavior in complex interfaces, Infinite Craft game offers interactive tools that might inspire smarter meshing strategies.