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lammps/bench/POTENTIALS/in.peri
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in.peri
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# Crack growth in notched 3D Peridynamic block
# Mesh spacing
variable h equal 5.00e-4
# Peridynamic horizon
variable delta equal 3.0*${h}
# Height of plate (meters)
variable height equal 31.5*${h}
# Width of plate (meters)
variable width equal 39.5*${h}
# Thickness of plate (meters)
variable depth equal 24.5*${h}
# Height of notch
variable crackheight equal 10*${h}
# Density of plate
variable mydensity equal 2440.0
# Elastic modulus of material
variable myE equal 72.0e9
# Strain energy release rate at branching
variable myG equal 135.0
# constant, but define it as a variable here
variable pi equal 3.14159265358979323846
units si
boundary s s s
atom_style peri
atom_modify map array
variable myskin equal 2.0*${h}
neighbor ${myskin} bin
lattice sc $h
variable myxmin equal 0.0
variable myxmax equal ${width}
variable myymin equal 0.0
variable myymax equal ${height}
variable myzmin equal 0.0
variable myzmax equal ${depth}
region plate block &
${myxmin} ${myxmax} ${myymin} ${myymax} ${myzmin} ${myzmax} &
units box
create_box 3 plate
create_atoms 1 region plate
pair_style peri/pmb
variable myk equal (2.0/3.0)*${myE}
variable myc equal ((18.0*${myk})/(${pi}*(${delta}^4)))
variable mydelta equal (${delta}+(${delta}/100.0))
variable mys0 equal sqrt((5.0*${myG})/(9.0*${myk}*${delta}))
variable tmpvar1 equal ${myymax}-${crackheight}
variable tmpvar2 equal 0.5*${width}
region topleft block &
0.0 ${tmpvar2} ${tmpvar1} ${myymax} ${myzmin} ${myzmax} &
units box
region topright block &
${tmpvar2} ${myxmax} ${tmpvar1} ${myymax} ${myzmin} ${myzmax} &
units box
set region topleft type 2
set region topright type 3
pair_coeff 1 1 ${myc} ${mydelta} ${mys0} 0.0
pair_coeff 2 2 ${myc} ${mydelta} ${mys0} 0.0
pair_coeff 3 3 ${myc} ${mydelta} ${mys0} 0.0
pair_coeff 2 3 ${myc} 0.0 ${mys0} 0.0
pair_coeff 1 2 ${myc} ${mydelta} ${mys0} 0.0
pair_coeff 1 3 ${myc} ${mydelta} ${mys0} 0.0
set group all density ${mydensity}
variable myvolume equal ($h)^3
set group all volume ${myvolume}
velocity all set 0.0 0.0 0.0 sum no units box
fix F1 all nve
compute C1 all damage/atom
velocity all ramp vx -10.0 10.0 x ${myxmin} ${myxmax} units box
variable mystep equal &
0.8*sqrt((2.0*${mydensity})/(512*(${myc}/$h)*${myvolume}))
timestep ${mystep}
thermo 20
run 100
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