cut in mesh with coincident nodes connecting different elements
I would like to make a cut in a 2D mesh to model a surface fracture.
I can have the mesh algorithm to put nodes on the crack line but I would like the mesh to be 'crack-open'
or I would like to have coincident nodes on the crack line, connecting separate elements.
this is the current file: rectangle_w_cut_01.geo
and this is the result
I would like to have the elements 19 & 25, and 20 & 24, not being connected by nodes 1, 18, and 6, but having different nodes initially coincident
many thanks in advance Andrea