How to split mesh (or duplicate notes) along lines in 2D
 

Hi all, when using ICEM CFD to generate the mesh, I was trying to split the mesh along lines or duplicate the nodes along lines in 2D, since I want to introduce a line crack inside the material, how can I do this? In 3D, it seems straightforward, I only need to split the "int wall", but in 2D I cannot find this feature in ANSYS ICEM CFD. Anybody has better methods?

Thank you very much.