# Geometry Creation of a Crack - Fracture

I want to create a simple geometry, for example, a brick, with a crack, a single fracture in it.

I created the brick, and now I want to create the fracture. Can Trelis do that?

I do not want the crack to go all the way till the end of the brick. For example, if the length of the brick is 10 ft, I want the crack to end at 7 ft. I tried to use different geometry entities, and then use boolean subtract, but it is not working the way I want.

What geometry entity would you recommend to use to create a crack?

Also, if the brick is set to be a porous medium, is it possible to mesh and set permeability and porosity values?

Here is a journal file that shows an example of what I think you are looking for. Either copy and paste these commands into the journal editor or just paste them into the command tab at the Trelis> prompt.

We do not currently support setting permeability or porosity.

#----- Begin Trelis Journal File ----

brick x 10

# ones just for an example, General Plane and Coordinate Plane.

webcut body 1 with general plane location 0 -2 0 direction 0 1 0
webcut body 1 with plane xplane offset 0 rotate 20 about center 0 0 0

# Imprint maps boundary curves between the various volumes or bodies

imprint all

#Select one of the surfaces on the fracture. Make sure your filters are set to

# I didn’t find this option easily in the GUI, so from the command prompt, type

surface 17 merge off

# merge all other surfaces in the model, so that you have a conformal mesh

merge surface all

mesh volume all

# verify that there are coincident nodes in the correct locations but not everywhere else!

topology check coincident node volume all tolerance 1.0e-6 draw brief nogroup

I think you may misunderstand his meaning, he just like to generate a finite surface, rather than the infinite plane by webcut.
Is there anyone who can help with this?
Thank you!

Hello, did you solve this problem?

I also would like to find an available method to generate such geometry.
Can anyone help me with this question? Thanks!