echo both
units		metal
atom_style      atomic
atom_modify map hash
boundary	p p p

variable l equal 3
variable l2 equal 0.5*$l
variable L equal 10
variable L2 equal 0.5*$L
variable h equal $L

lattice fcc 4.08 origin 0.25 0.25 0.25
region	BOX  block -${l2} ${l2} -${L2} ${L2} -${l2} ${l2} 
create_box 1 BOX
create_atoms 1 region BOX

pair_style  eam 
pair_coeff  * * Au_u3.eam
mass          *  196.97


### NOTE change to CB -linear
fix         PP  all   atc field   Au_elastic.mat 
fix_modify  PP  mesh  create 1 $h 1 BOX p f p
fix_modify  PP  fields add displacement velocity potential_energy cauchy_born_energy #  kinetic_energy
fix_modify  PP  gradients add displacement 
fix_modify  PP  set reference_potential_energy 
fix_modify  PP  output counter step
fix_modify  PP  output eam_energyPP 1 text

fix         ATC all   atc elastic Au_elastic.mat
fix_modify  ATC mesh  create 1 $h 1 BOX p f p
fix_modify  ATC internal_quadrature off
fix_modify  ATC control momentum none
#fix_modify  ATC consistent_fe_initialization on
fix_modify  ATC output counter step
fix_modify  ATC output eam_energyFE 1 text binary
fix_modify  ATC material all Au_cubic


dump  CONFIG all custom 1 eam_energy.dmp id type x y z
thermo 1

timestep 0 # 1.e-20 # 0

variable e0 equal pe
variable L0 equal ly
run 0
variable pe equal pe-${e0}
variable dL equal ly-${L0}
variable strain equal v_dL/${L0}

variable x equal y[1]
variable x2 equal y[2]
variable v equal vy[1]
thermo_style custom step etotal v_pe ke f_ATC[1] f_ATC[2] v_x v_v v_x2 ly v_dL v_strain
thermo_modify format 2 %15.8g

###############################################################################
log  eam_energy.log
run 1
velocity all set 0 0.1 0 units box
fix_modify ATC fix velocity y all 0.1
run 1
velocity all set 0 0.2 0 units box
fix_modify ATC fix velocity y all 0.2
run 1
velocity all set 0 0.3 0 units box
fix_modify ATC fix velocity y all 0.3
run 1
change_box all y scale 1.01 remap
fix_modify ATC fix displacement y all linear 0 0 0 0 0.01 0 0
run 1
change_box all y scale 1.01 remap
fix_modify ATC fix displacement y all linear 0 0 0 0 0.0201 0 0
run 1
change_box all y scale 1.01 remap
fix_modify ATC fix displacement y all linear 0 0 0 0 0.030301 0 0
run 1