Command for adding tensile force to atoms in a simulation box

Rajesh ,

This is my code can you find the bug ?

units metal
boundary p p p
atom_style full
read_data d1.g
pair_style lj/cut 2.5
pair_coeff * * 1.0 1.0
fix 1 all deform 1 x erate 0.1 remap v
#fix center all drag 0.0 60 0.0 25 2.0
#fix ff boundary addforce 10 0.0 0.0
thermo 100
thermo_style custom step temp pe etotal press vol
neighbor 0.3 bin
neigh_modify every 2 delay 10 check yes page 100000
dump d0 all image 1000 dump.*.jpg type type
run 10000