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main_damage.jl
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main_damage.jl
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import JuAFEM
import CALFEM
using ForwardDiff
using ContMechTensors
import PyPlot
using WriteVTK
include("src/material_params.jl")
include("src/meshgenerator.jl")
include("src/PGDmodule.jl")
include("src/utilities.jl")
include("src/elementFunctions.jl")
include("src/globResK.jl")
include("src/visualize.jl")
include("src/boundaryConditions.jl")
include("src/solvers.jl")
include("src/vtkwriter.jl")
include("src/pretty_printing.jl")
############################################
# Main file for PGD elasticity with damage #
############################################
function main_damage()
############
# Geometry #
############
xStart = 0; yStart = 0
xEnd = 1; yEnd = 1
xnEl = 50; ynEl = 50
###################
# Displacement, U #
###################
# Mesh
xnElNodes = 2; ynElNodes = 2
xnNodeDofs = 2; ynNodeDofs = 2
xynNodeDofs = 2
xmesh = create_mesh1D(xStart,xEnd,xnEl,xnElNodes,xnNodeDofs)
ymesh = create_mesh1D(yStart,yEnd,ynEl,ynElNodes,ynNodeDofs)
xymesh = create_mesh2D(xStart,xEnd,yStart,yEnd,xnEl,ynEl,xynNodeDofs)
# Set up the two components
function_space = JuAFEM.Lagrange{1,JuAFEM.RefCube,1}()
q_rule = JuAFEM.QuadratureRule(JuAFEM.Dim{1},JuAFEM.RefCube(),1)
fevx = JuAFEM.FEValues(Float64,q_rule,function_space)
fevy = JuAFEM.FEValues(Float64,q_rule,function_space)
Ux = PGDComponent(1,xmesh,fevx)
Uy = PGDComponent(1,ymesh,fevy)
# Combine the 2 components
function_space = JuAFEM.Lagrange{2,JuAFEM.RefCube,1}()
q_rule = JuAFEM.QuadratureRule(JuAFEM.Dim{2},JuAFEM.RefCube(),2)
fevxy = JuAFEM.FEValues(Float64,q_rule,function_space)
U = PGDFunction(2,2,xymesh,fevxy,[Ux, Uy])
U_edof = create_edof(U,xynNodeDofs)
#############
# Damage, D #
#############
# Mesh
xnElNodes = 2; ynElNodes = 2
xnNodeDofs = 1; ynNodeDofs = 1
xynNodeDofs = 1
xmesh = create_mesh1D(xStart,xEnd,xnEl,xnElNodes,xnNodeDofs)
ymesh = create_mesh1D(yStart,yEnd,ynEl,ynElNodes,ynNodeDofs)
xymesh = create_mesh2D(xStart,xEnd,yStart,yEnd,xnEl,ynEl,xynNodeDofs)
# Set up the two components
function_space = JuAFEM.Lagrange{1,JuAFEM.RefCube,1}()
q_rule = JuAFEM.QuadratureRule(JuAFEM.Dim{1},JuAFEM.RefCube(),1)
fevx = JuAFEM.FEValues(Float64,q_rule,function_space)
fevy = JuAFEM.FEValues(Float64,q_rule,function_space)
Dx = PGDComponent(1,xmesh,fevx)
Dy = PGDComponent(1,ymesh,fevy)
# Combine the 2 components
function_space = JuAFEM.Lagrange{2,JuAFEM.RefCube,1}()
q_rule = JuAFEM.QuadratureRule(JuAFEM.Dim{2},JuAFEM.RefCube(),2)
fevxy = JuAFEM.FEValues(Float64,q_rule,function_space)
D = PGDFunction(2,2,xymesh,fevxy,[Dx, Dy])
D_edof = create_edof(D,xynNodeDofs)
#########################
# Simulation parameters #
#########################
U_n_modes = 5
D_n_modes = 5
n_loadsteps = 100
max_displacement = 0.1*0.5
#######################
# Material parameters #
#######################
E = 1; ν = 0.3
U_mp = LinearElastic(:E,E,:ν,ν)
U_mp_tangent = TangentStiffness(U_mp)
U_mp = LinearElastic_withTangent(U_mp,U_mp_tangent)
gc = 0.01/1000 # 0.01/1000
l = 0.05
D_mp = PhaseFieldDamage(gc,l)
# Set up vector to store elastic energy
Ψ = [zeros(Float64,length(JuAFEM.points(D.fev.quad_rule))) for i in 1:D.mesh.nEl]
Ψ_new = copy(Ψ)
#######################
# Boundary conditions #
#######################
U_bc, U_dirichletmode = U_BC(U)
U.modes += 1 # Add the first mode as a dirichlet mode
U_a = [U_dirichletmode 0.1*repmat(ones(U_dirichletmode),1,U_n_modes)]
U_a_old = copy(U_a)
D_bc, D_dirichletmode = D_BC(D)
D.modes += 1 # Add the first mode as a dirichlet mode
D_a = [D_dirichletmode 0.0*repmat(ones(D_dirichletmode),1,D_n_modes)]
D_a_old = copy(D_a)
# Body force
b = [0.0, 0.0]
################
# Write output #
################
pvd = paraview_collection("./vtkfiles_damage/vtkoutfile")
####################
# Start simulation #
####################
for loadstep in 0:n_loadsteps
print_loadstep(loadstep,n_loadsteps)
controlled_displacement = max_displacement*(loadstep/n_loadsteps)
U_a[:,1] = sqrt(controlled_displacement) * U_dirichletmode # Since `dirichletmode` is squared
for j in 1:3 # Do some iterations
# Displacement as function of damage
for modeItr = 2:(U_n_modes + 1)
print_modeitr(modeItr-1,U_n_modes,"displacement")
newMode, Ψ_new = UD_ModeSolver(U_a,U_a_old,U,U_bc,U_edof,
D_a,D_a_old,D,D_bc,D_edof,
U_mp,b,modeItr)
U_a[:,modeItr] = newMode
U.modes = modeItr
println("done!")
end
# Calculate max energy
for i in 1:length(Ψ)
Ψ[i] = max(Ψ[i],Ψ_new[i])
end
# Damage as function of the displacement
for modeItr = 2:(D_n_modes + 1)
print_modeitr(modeItr-1,D_n_modes,"damage")
newMode = DU_ModeSolver(D_a,D_a_old,D,D_bc,D_edof,
D_mp,Ψ,modeItr)
D_a[:,modeItr] = newMode
D.modes = modeItr
println("done!")
end
if loadstep > 0 # Since first loadstep is a 0-mode
copy!(U_a_old,U_a)
# copy!(D_a_old,D_a)
end
U.modes = 1
D.modes = 1
end
# Write to file
vtkwriter(pvd,U_a,U,D_a,D,Ψ,loadstep)
# if loadstep > 0 # Since first loadstep is a 0-mode
# copy!(U_a_old,U_a)
# # copy!(D_a_old,D_a)
# end
# U.modes = 1
# D.modes = 1
end # of loadstepping
vtk_save(pvd)
return U_a, U, D_a, D
end
@time o = main_damage()
visualize(o...)