Dear Sir,

Can you please tell me how to introduce dislocation into any materials. Is there any command in LAMMPS or how to proceed for it through LAMMPS. I am trying to do it for Pure iron.



There is no command in LAMMPS to do this. I suppose
if you were clever you could use create_atoms and delete_atoms
and displace_atoms to do something close to it. But it would
likely be easier to just build the geometry you want with some
other code (that you write) and input it as a data file.