How Can I generate a inner crack (seam) using cubit?

Coreform Cubit Geometry
#1

Hello, Everyone!
I would like to use Cubit to generate a geometry with initial cracks.

image
image794×715 27.9 KB

But the surface and crack are always independent when I do the calculations.
How can I generate a case with a crack cutting of the surface?
Thanks a lot for anyone’s help.

#2

Hi @GuoGUO,

Welcome to the forum. If you are given a finite width for the crack as shown in this problem, I might create the mesh model as shown in the following commands.

reset
create surf rect width 1 height 1
create surf rect width .01 height .1
subtract body 2 from 1

compress  # This is just so that I can work on surface with id 1
surf 1 scheme trimesh
Curve 5 7 interval 4
mesh surf 1

Is this what you are looking for?

image

Thanks,
Karl

#3

Hi @karl,

Thanks for your reply. It is useful!

I actually used another command to realize the initial crack, like merge to combine two different rectangular.

BTW, what is the meaning of your command line ‘Curve 5 7 interval 4’?

Thanks,
Mark Guo

#4

The command

curve 5 7 interval 4

specifies that there must be at 4 edges exactly on curves 5 and 7. It is a method for specifying size by the number of edges on a curve.

Thanks,
Karl

#5

Got it! Thanks a lot for your help!

Thanks,
Mark