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# 3d contact simulation(Sphere_Slid)

units        metal
dimension    3   
boundary    p p p

atom_style    atomic
neighbor    3.0 bin
neigh_modify    delay 5
newton        on

# create geometry

region        box block 0.0 40.0 0.0 40.0 0.0 50.0 units box
create_box    4 box

mass        1 29.0
mass        2 29.0
mass        3 29.0
mass        4 12.0

# atom regions
region        reg block 0.0 40.0 0.0 40.0 0.0 25.0 units box
region        reg1 block 3.0 37.0 3.0 37.0 3.0 25.0 units box
region        newtonian_layer block 8.0 32.0 8.0 32.0 8.0 25.0 units box
region        asperity sphere 20 20 30 5 units box

lattice       diamond 5.431        
create_atoms    1 region reg units box
lattice        diamond 3.5667
create_atoms    2 region asperity units box

# Tersoff Potentials

pair_style    tersoff
pair_coeff    * * SiC.tersoff Si Si Si C

# define groups

group        reg region reg
group        reg1 region reg1
group        newtonian_layer region newtonian_layer
group        thermostat_layer subtract reg1 newtonian_layer
group        boundary_layer_down subtract reg reg1
group        asperity region asperity

group        integrater union reg asperity

set           group newtonian_layer type 1
set           group thermostat_layer type 2
set           group boundary_layer_down type 3
set           group asperity type 4

# initial velocities

compute        newTemp thermostat_layer temp
velocity    thermostat_layer create 293.0 5812775 temp newTemp units box

# fixed

fix        1 integrater nve
fix        2 boundary_layer_down setforce 0.0 0.0 0.0

velocity    newtonian_layer set NULL NULL NULL units box
velocity    thermostat_layer create 293.0 5812775 temp newTemp units box
fix        3 thermostat_layer temp/rescale 10 293.0 293.0 10 1
fix_modify    3 temp newTemp
fix             4 asperity setforce 0.0 0.0 0.0


compute        forcez newtonian_layer property/atom fz
compute        force  newtonian_layer reduce sum c_forcez

compute        forcex newtonian_layer property/atom fx
compute        lateralforce  newtonian_layer reduce sum c_forcex            

timestep    0.001
thermo        5

thermo_style    custom step temp press pe ke etotal c_force c_lateralforce vol
thermo_modify    temp newTemp
dump        1 all atom 50 dump.contact_block_slid

fix        6 asperity move linear 0.0 0.0 -1.0 units box
run        2000

fix        6 asperity move linear 0.0 0.0 1.0 units box
run        2000
logÎļþ³ö´í£º
WARNING: Temperature for thermo pressure is not for group all (thermo.cpp:432)
WARNING: One or more atoms are time integrated more than once (modify.cpp:216)£¬
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zhoudeyuan

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