Force Fields in LAMMPS Modeling where two types of materials involved

Hi All LAMMPS Users,

I am trying to model a test where a metal penetrator will penetrate a granular media. Now, my question is do i need to define separate force fields for penetrator metal and granular media?

If i need to define separate force fields for metal penetrator and granular media, how can i do that? So far i have seen and done modeling with one force field.

Thanks,

Sharif Islam

NYU Polytechnic School of Engineering

yes, you have to define force fields for all your materials.
You can use pair_style hybrid. But you have to
provide the force fields as input.

Steve