[lammps-users] Elliptical Crack

Hi users
How to make an elliptical crack in the sample with lammps command. Any suggestions I am new here.

See the create_atoms command and its var and set options.
If you assign a formula for the ellipsoid to a variable that returns
0 when an atom is inside the crack region and 1 otherwise, then when
you create your lattice of atoms it will have a ellipsoid shaped void where
you want the crack to be.