2D Crack Mesh Generation

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kashwanij
Posts: 2
Joined: Tue Jan 14, 2020 11:17 am

2D Crack Mesh Generation

Postby kashwanij » Tue Jan 14, 2020 11:23 am

Hello Everyone,
I have the following situation:-
there is a 2D plane in which I have some random oriented cracks. I want to generate the mesh in such away that all the crack lines become the edge of the elements. One possibility is that I connect all the crack lines manually and then make one close surface and mesh it. But this thing is so time consuming if I have more than 300 cracks lines.
Is there any solution in the Gid to reduce the time and effort.

Thanks in advance
User avatar
escolano
Posts: 1605
Joined: Thu Sep 18, 2014 3:31 pm

Re: 2D Crack Mesh Generation

Postby escolano » Tue Jan 14, 2020 7:26 pm

It exists an option
Mesh->Mesh criteria->Force points to->surface mesh...

Unfortunately doesn't exists an option like 'force lines to', but maybe the first one can aid you.

First use the tool
Geometry->Edit->Divide lines->Num divisions (or Length)
to divide the crack lines to create points at similar distance of the required mesh size.
the use
Mesh->Mesh criteria->Force points to->surface mesh...
select the surface, and then the points of the crack lines.
Then generate the mesh. If you are lucky maybe the triangles generate will non only use the forced nodes, but also the edges of the triangles match these lines.
see my pictures:
lines_divided_to_create_enougth_points.png
lines_divided_to_create_enougth_points.png (8.32 KiB) Viewed 20 times

mesh_with_points_forced_to_mesh_nodes.png
mesh_with_points_forced_to_mesh_nodes.png (27.37 KiB) Viewed 20 times
kashwanij
Posts: 2
Joined: Tue Jan 14, 2020 11:17 am

Re: 2D Crack Mesh Generation

Postby kashwanij » Wed Jan 15, 2020 11:48 am

Thanks escolano.
:) :)

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