add force

Dear LAMMPS developers:
I want to apply a load to atoms,I wish the force is a numeric constant and the force is continuous during my simulation process。How can I realize it ?
Thank you very much.
Best wishes

Dear LAMMPS developers:
I want to apply a load to atoms,I wish the force is a numeric constant and
the force is continuous during my simulation process。How can I realize it ?

all the LAMMPS features and capabilities are described in the manual.
have you considered reading it?

axel.

Fix addforce is a good place to start.

Steve