WIP: part of dotState should be in deltaState

This commit is contained in:
Martin Diehl 2020-05-03 10:49:36 +02:00
parent 68b6aec5f2
commit 8995faae8b
1 changed files with 404 additions and 0 deletions

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@ -1344,6 +1344,410 @@ module subroutine plastic_nonlocal_dotState(Mp, F, Fp, Temperature,timestep, &
end subroutine plastic_nonlocal_dotState
!---------------------------------------------------------------------------------------------------
!> @brief calculates the rate of change of microstructure
!---------------------------------------------------------------------------------------------------
subroutine plastic_nonlocal_dotState2(Mp, F, Fp, Temperature,timestep, &
instance,of,ip,el)
real(pReal), dimension(3,3), intent(in) :: &
Mp !< MandelStress
real(pReal), dimension(3,3,homogenization_maxNgrains,discretization_nIP,discretization_nElem), intent(in) :: &
F, & !< elastic deformation gradient
Fp !< plastic deformation gradient
real(pReal), intent(in) :: &
Temperature, & !< temperature
timestep !< substepped crystallite time increment
integer, intent(in) :: &
instance, &
of, &
ip, & !< current integration point
el !< current element number
integer :: &
ph, &
neighbor_instance, & !< instance of my neighbor's plasticity
ns, & !< short notation for the total number of active slip systems
c, & !< character of dislocation
n, & !< index of my current neighbor
neighbor_el, & !< element number of my neighbor
neighbor_ip, & !< integration point of my neighbor
neighbor_n, & !< neighbor index pointing to me when looking from my neighbor
opposite_neighbor, & !< index of my opposite neighbor
opposite_ip, & !< ip of my opposite neighbor
opposite_el, & !< element index of my opposite neighbor
opposite_n, & !< neighbor index pointing to me when looking from my opposite neighbor
t, & !< type of dislocation
no,& !< neighbor offset shortcut
np,& !< neighbor phase shortcut
topp, & !< type of dislocation with opposite sign to t
s !< index of my current slip system
real(pReal), dimension(param(instance)%sum_N_sl,10) :: &
rho, &
rho0, & !< dislocation density at beginning of time step
rhoDot, & !< density evolution
rhoDotMultiplication, & !< density evolution by multiplication
rhoDotFlux, & !< density evolution by flux
rhoDotSingle2DipoleGlide, & !< density evolution by dipole formation (by glide)
rhoDotAthermalAnnihilation, & !< density evolution by athermal annihilation
rhoDotThermalAnnihilation !< density evolution by thermal annihilation
real(pReal), dimension(param(instance)%sum_N_sl,8) :: &
rhoSgl, & !< current single dislocation densities (positive/negative screw and edge without dipoles)
neighbor_rhoSgl0, & !< current single dislocation densities of neighboring ip (positive/negative screw and edge without dipoles)
my_rhoSgl0 !< single dislocation densities of central ip (positive/negative screw and edge without dipoles)
real(pReal), dimension(param(instance)%sum_N_sl,4) :: &
v, & !< current dislocation glide velocity
v0, &
neighbor_v0, & !< dislocation glide velocity of enighboring ip
gdot !< shear rates
real(pReal), dimension(param(instance)%sum_N_sl) :: &
tau, & !< current resolved shear stress
vClimb !< climb velocity of edge dipoles
real(pReal), dimension(param(instance)%sum_N_sl,2) :: &
rhoDip, & !< current dipole dislocation densities (screw and edge dipoles)
dLower, & !< minimum stable dipole distance for edges and screws
dUpper !< current maximum stable dipole distance for edges and screws
real(pReal), dimension(3,param(instance)%sum_N_sl,4) :: &
m !< direction of dislocation motion
real(pReal), dimension(3,3) :: &
my_F, & !< my total deformation gradient
neighbor_F, & !< total deformation gradient of my neighbor
my_Fe, & !< my elastic deformation gradient
neighbor_Fe, & !< elastic deformation gradient of my neighbor
Favg !< average total deformation gradient of me and my neighbor
real(pReal), dimension(3) :: &
normal_neighbor2me, & !< interface normal pointing from my neighbor to me in neighbor's lattice configuration
normal_neighbor2me_defConf, & !< interface normal pointing from my neighbor to me in shared deformed configuration
normal_me2neighbor, & !< interface normal pointing from me to my neighbor in my lattice configuration
normal_me2neighbor_defConf !< interface normal pointing from me to my neighbor in shared deformed configuration
real(pReal) :: &
area, & !< area of the current interface
transmissivity, & !< overall transmissivity of dislocation flux to neighboring material point
lineLength, & !< dislocation line length leaving the current interface
selfDiffusion !< self diffusion
ph = material_phaseAt(1,el)
if (timestep <= 0.0_pReal) then
plasticState(ph)%dotState = 0.0_pReal
return
endif
associate(prm => param(instance), &
dst => microstructure(instance), &
dot => dotState(instance), &
stt => state(instance))
ns = prm%sum_N_sl
tau = 0.0_pReal
gdot = 0.0_pReal
rho = getRho(instance,of,ip,el)
rhoSgl = rho(:,sgl)
rhoDip = rho(:,dip)
rho0 = getRho0(instance,of,ip,el)
my_rhoSgl0 = rho0(:,sgl)
forall (s = 1:ns, t = 1:4) v(s,t) = plasticState(ph)%state(iV(s,t,instance),of)
gdot = rhoSgl(:,1:4) * v * spread(prm%burgers,2,4)
#ifdef DEBUG
if (iand(debug_level(debug_constitutive),debug_levelBasic) /= 0 &
.and. ((debug_e == el .and. debug_i == ip)&
.or. .not. iand(debug_level(debug_constitutive),debug_levelSelective) /= 0 )) then
write(6,'(a,/,10(12x,12(e12.5,1x),/))') '<< CONST >> rho / 1/m^2', rhoSgl, rhoDip
write(6,'(a,/,4(12x,12(e12.5,1x),/))') '<< CONST >> gdot / 1/s',gdot
endif
#endif
!****************************************************************************
!*** limits for stable dipole height
do s = 1,ns
tau(s) = math_tensordot(Mp, prm%Schmid(1:3,1:3,s)) + dst%tau_back(s,of)
if (abs(tau(s)) < 1.0e-15_pReal) tau(s) = 1.0e-15_pReal
enddo
dLower = prm%minDipoleHeight
dUpper(:,1) = prm%mu * prm%burgers/(8.0_pReal * PI * (1.0_pReal - prm%nu) * abs(tau))
dUpper(:,2) = prm%mu * prm%burgers/(4.0_pReal * PI * abs(tau))
where(dNeq0(sqrt(sum(abs(rho(:,edg)),2)))) &
dUpper(:,1) = min(1.0_pReal/sqrt(sum(abs(rho(:,edg)),2)),dUpper(:,1))
where(dNeq0(sqrt(sum(abs(rho(:,scr)),2)))) &
dUpper(:,2) = min(1.0_pReal/sqrt(sum(abs(rho(:,scr)),2)),dUpper(:,2))
dUpper = max(dUpper,dLower)
!****************************************************************************
!*** dislocation multiplication
rhoDotMultiplication = 0.0_pReal
isBCC: if (lattice_structure(ph) == LATTICE_bcc_ID) then
forall (s = 1:ns, sum(abs(v(s,1:4))) > 0.0_pReal)
rhoDotMultiplication(s,1:2) = sum(abs(gdot(s,3:4))) / prm%burgers(s) & ! assuming double-cross-slip of screws to be decisive for multiplication
* sqrt(stt%rho_forest(s,of)) / prm%lambda0(s) ! & ! mean free path
! * 2.0_pReal * sum(abs(v(s,3:4))) / sum(abs(v(s,1:4))) ! ratio of screw to overall velocity determines edge generation
rhoDotMultiplication(s,3:4) = sum(abs(gdot(s,3:4))) /prm%burgers(s) & ! assuming double-cross-slip of screws to be decisive for multiplication
* sqrt(stt%rho_forest(s,of)) / prm%lambda0(s) ! & ! mean free path
! * 2.0_pReal * sum(abs(v(s,1:2))) / sum(abs(v(s,1:4))) ! ratio of edge to overall velocity determines screw generation
endforall
else isBCC
rhoDotMultiplication(:,1:4) = spread( &
(sum(abs(gdot(:,1:2)),2) * prm%fEdgeMultiplication + sum(abs(gdot(:,3:4)),2)) &
* sqrt(stt%rho_forest(:,of)) / prm%lambda0 / prm%burgers, 2, 4)
endif isBCC
forall (s = 1:ns, t = 1:4) v0(s,t) = plasticState(ph)%state0(iV(s,t,instance),of)
!****************************************************************************
!*** calculate dislocation fluxes (only for nonlocal plasticity)
rhoDotFlux = 0.0_pReal
if (.not. phase_localPlasticity(material_phaseAt(1,el))) then
!*** check CFL (Courant-Friedrichs-Lewy) condition for flux
if (any( abs(gdot) > 0.0_pReal & ! any active slip system ...
.and. prm%CFLfactor * abs(v0) * timestep &
> IPvolume(ip,el) / maxval(IParea(:,ip,el)))) then ! ...with velocity above critical value (we use the reference volume and area for simplicity here)
#ifdef DEBUG
if (iand(debug_level(debug_constitutive),debug_levelExtensive) /= 0) then
write(6,'(a,i5,a,i2)') '<< CONST >> CFL condition not fullfilled at el ',el,' ip ',ip
write(6,'(a,e10.3,a,e10.3)') '<< CONST >> velocity is at ', &
maxval(abs(v0), abs(gdot) > 0.0_pReal &
.and. prm%CFLfactor * abs(v0) * timestep &
> IPvolume(ip,el) / maxval(IParea(:,ip,el))), &
' at a timestep of ',timestep
write(6,'(a)') '<< CONST >> enforcing cutback !!!'
endif
#endif
plasticState(ph)%dotState = IEEE_value(1.0_pReal,IEEE_quiet_NaN) ! -> return NaN and, hence, enforce cutback
return
endif
!*** be aware of the definition of slip_transverse = slip_direction x slip_normal !!!
!*** opposite sign to our t vector in the (s,t,n) triplet !!!
m(1:3,:,1) = prm%slip_direction
m(1:3,:,2) = -prm%slip_direction
m(1:3,:,3) = -prm%slip_transverse
m(1:3,:,4) = prm%slip_transverse
my_F = F(1:3,1:3,1,ip,el)
my_Fe = matmul(my_F, math_inv33(Fp(1:3,1:3,1,ip,el)))
neighbors: do n = 1,nIPneighbors
neighbor_el = IPneighborhood(1,n,ip,el)
neighbor_ip = IPneighborhood(2,n,ip,el)
neighbor_n = IPneighborhood(3,n,ip,el)
np = material_phaseAt(1,neighbor_el)
no = material_phasememberAt(1,neighbor_ip,neighbor_el)
opposite_neighbor = n + mod(n,2) - mod(n+1,2)
opposite_el = IPneighborhood(1,opposite_neighbor,ip,el)
opposite_ip = IPneighborhood(2,opposite_neighbor,ip,el)
opposite_n = IPneighborhood(3,opposite_neighbor,ip,el)
if (neighbor_n > 0) then ! if neighbor exists, average deformation gradient
neighbor_instance = phase_plasticityInstance(material_phaseAt(1,neighbor_el))
neighbor_F = F(1:3,1:3,1,neighbor_ip,neighbor_el)
neighbor_Fe = matmul(neighbor_F, math_inv33(Fp(1:3,1:3,1,neighbor_ip,neighbor_el)))
Favg = 0.5_pReal * (my_F + neighbor_F)
else ! if no neighbor, take my value as average
Favg = my_F
endif
neighbor_v0 = 0.0_pReal ! needed for check of sign change in flux density below
!* FLUX FROM MY NEIGHBOR TO ME
!* This is only considered, if I have a neighbor of nonlocal plasticity
!* (also nonlocal constitutive law with local properties) that is at least a little bit
!* compatible.
!* If it's not at all compatible, no flux is arriving, because everything is dammed in front of
!* my neighbor's interface.
!* The entering flux from my neighbor will be distributed on my slip systems according to the
!* compatibility
if (neighbor_n > 0) then
if (phase_plasticity(material_phaseAt(1,neighbor_el)) == PLASTICITY_NONLOCAL_ID .and. &
any(compatibility(:,:,:,n,ip,el) > 0.0_pReal)) then
forall (s = 1:ns, t = 1:4)
neighbor_v0(s,t) = plasticState(np)%state0(iV (s,t,neighbor_instance),no)
neighbor_rhoSgl0(s,t) = max(plasticState(np)%state0(iRhoU(s,t,neighbor_instance),no),0.0_pReal)
endforall
where (neighbor_rhoSgl0 * IPvolume(neighbor_ip,neighbor_el) ** 0.667_pReal < prm%significantN &
.or. neighbor_rhoSgl0 < prm%significantRho) &
neighbor_rhoSgl0 = 0.0_pReal
normal_neighbor2me_defConf = math_det33(Favg) * matmul(math_inv33(transpose(Favg)), &
IPareaNormal(1:3,neighbor_n,neighbor_ip,neighbor_el)) ! normal of the interface in (average) deformed configuration (pointing neighbor => me)
normal_neighbor2me = matmul(transpose(neighbor_Fe), normal_neighbor2me_defConf) &
/ math_det33(neighbor_Fe) ! interface normal in the lattice configuration of my neighbor
area = IParea(neighbor_n,neighbor_ip,neighbor_el) * norm2(normal_neighbor2me)
normal_neighbor2me = normal_neighbor2me / norm2(normal_neighbor2me) ! normalize the surface normal to unit length
do s = 1,ns
do t = 1,4
c = (t + 1) / 2
topp = t + mod(t,2) - mod(t+1,2)
if (neighbor_v0(s,t) * math_inner(m(1:3,s,t), normal_neighbor2me) > 0.0_pReal & ! flux from my neighbor to me == entering flux for me
.and. v0(s,t) * neighbor_v0(s,t) >= 0.0_pReal ) then ! ... only if no sign change in flux density
lineLength = neighbor_rhoSgl0(s,t) * neighbor_v0(s,t) &
* math_inner(m(1:3,s,t), normal_neighbor2me) * area ! positive line length that wants to enter through this interface
where (compatibility(c,:,s,n,ip,el) > 0.0_pReal) &
rhoDotFlux(:,t) = rhoDotFlux(1:ns,t) &
+ lineLength/IPvolume(ip,el)*compatibility(c,:,s,n,ip,el)**2.0_pReal ! transferring to equally signed mobile dislocation type
where (compatibility(c,:,s,n,ip,el) < 0.0_pReal) &
rhoDotFlux(:,topp) = rhoDotFlux(:,topp) &
+ lineLength/IPvolume(ip,el)*compatibility(c,:,s,n,ip,el)**2.0_pReal ! transferring to opposite signed mobile dislocation type
endif
enddo
enddo
endif; endif
!* FLUX FROM ME TO MY NEIGHBOR
!* This is not considered, if my opposite neighbor has a different constitutive law than nonlocal (still considered for nonlocal law with local properties).
!* Then, we assume, that the opposite(!) neighbor sends an equal amount of dislocations to me.
!* So the net flux in the direction of my neighbor is equal to zero:
!* leaving flux to neighbor == entering flux from opposite neighbor
!* In case of reduced transmissivity, part of the leaving flux is stored as dead dislocation density.
!* That means for an interface of zero transmissivity the leaving flux is fully converted to dead dislocations.
if (opposite_n > 0) then
if (phase_plasticity(material_phaseAt(1,opposite_el)) == PLASTICITY_NONLOCAL_ID) then
normal_me2neighbor_defConf = math_det33(Favg) &
* matmul(math_inv33(transpose(Favg)),IPareaNormal(1:3,n,ip,el)) ! normal of the interface in (average) deformed configuration (pointing me => neighbor)
normal_me2neighbor = matmul(transpose(my_Fe), normal_me2neighbor_defConf) &
/ math_det33(my_Fe) ! interface normal in my lattice configuration
area = IParea(n,ip,el) * norm2(normal_me2neighbor)
normal_me2neighbor = normal_me2neighbor / norm2(normal_me2neighbor) ! normalize the surface normal to unit length
do s = 1,ns
do t = 1,4
c = (t + 1) / 2
if (v0(s,t) * math_inner(m(1:3,s,t), normal_me2neighbor) > 0.0_pReal ) then ! flux from me to my neighbor == leaving flux for me (might also be a pure flux from my mobile density to dead density if interface not at all transmissive)
if (v0(s,t) * neighbor_v0(s,t) >= 0.0_pReal) then ! no sign change in flux density
transmissivity = sum(compatibility(c,:,s,n,ip,el)**2.0_pReal) ! overall transmissivity from this slip system to my neighbor
else ! sign change in flux density means sign change in stress which does not allow for dislocations to arive at the neighbor
transmissivity = 0.0_pReal
endif
lineLength = my_rhoSgl0(s,t) * v0(s,t) &
* math_inner(m(1:3,s,t), normal_me2neighbor) * area ! positive line length of mobiles that wants to leave through this interface
rhoDotFlux(s,t) = rhoDotFlux(s,t) - lineLength / IPvolume(ip,el) ! subtract dislocation flux from current type
rhoDotFlux(s,t+4) = rhoDotFlux(s,t+4) &
+ lineLength / IPvolume(ip,el) * (1.0_pReal - transmissivity) &
* sign(1.0_pReal, v0(s,t)) ! dislocation flux that is not able to leave through interface (because of low transmissivity) will remain as immobile single density at the material point
endif
enddo
enddo
endif; endif
enddo neighbors
endif
!****************************************************************************
!*** calculate dipole formation and annihilation
!*** formation by glide
do c = 1,2
rhoDotSingle2DipoleGlide(:,2*c-1) = -2.0_pReal * dUpper(:,c) / prm%burgers &
* ( rhoSgl(:,2*c-1) * abs(gdot(:,2*c)) & ! negative mobile --> positive mobile
+ rhoSgl(:,2*c) * abs(gdot(:,2*c-1)) & ! positive mobile --> negative mobile
+ abs(rhoSgl(:,2*c+4)) * abs(gdot(:,2*c-1))) ! positive mobile --> negative immobile
rhoDotSingle2DipoleGlide(:,2*c) = -2.0_pReal * dUpper(:,c) / prm%burgers &
* ( rhoSgl(:,2*c-1) * abs(gdot(:,2*c)) & ! negative mobile --> positive mobile
+ rhoSgl(:,2*c) * abs(gdot(:,2*c-1)) & ! positive mobile --> negative mobile
+ abs(rhoSgl(:,2*c+3)) * abs(gdot(:,2*c))) ! negative mobile --> positive immobile
rhoDotSingle2DipoleGlide(:,2*c+3) = -2.0_pReal * dUpper(:,c) / prm%burgers &
* rhoSgl(:,2*c+3) * abs(gdot(:,2*c)) ! negative mobile --> positive immobile
rhoDotSingle2DipoleGlide(:,2*c+4) = -2.0_pReal * dUpper(:,c) / prm%burgers &
* rhoSgl(:,2*c+4) * abs(gdot(:,2*c-1)) ! positive mobile --> negative immobile
rhoDotSingle2DipoleGlide(:,c+8) = abs(rhoDotSingle2DipoleGlide(:,2*c+3)) &
+ abs(rhoDotSingle2DipoleGlide(:,2*c+4)) &
- rhoDotSingle2DipoleGlide(:,2*c-1) &
- rhoDotSingle2DipoleGlide(:,2*c)
enddo
!*** athermal annihilation
rhoDotAthermalAnnihilation = 0.0_pReal
forall (c=1:2) &
rhoDotAthermalAnnihilation(:,c+8) = -2.0_pReal * dLower(:,c) / prm%burgers &
* ( 2.0_pReal * (rhoSgl(:,2*c-1) * abs(gdot(:,2*c)) + rhoSgl(:,2*c) * abs(gdot(:,2*c-1))) & ! was single hitting single
+ 2.0_pReal * (abs(rhoSgl(:,2*c+3)) * abs(gdot(:,2*c)) + abs(rhoSgl(:,2*c+4)) * abs(gdot(:,2*c-1))) & ! was single hitting immobile single or was immobile single hit by single
+ rhoDip(:,c) * (abs(gdot(:,2*c-1)) + abs(gdot(:,2*c)))) ! single knocks dipole constituent
! annihilated screw dipoles leave edge jogs behind on the colinear system
if (lattice_structure(ph) == LATTICE_fcc_ID) &
forall (s = 1:ns, prm%colinearSystem(s) > 0) &
rhoDotAthermalAnnihilation(prm%colinearSystem(s),1:2) = - rhoDotAthermalAnnihilation(s,10) &
* 0.25_pReal * sqrt(stt%rho_forest(s,of)) * (dUpper(s,2) + dLower(s,2)) * prm%edgeJogFactor
!*** thermally activated annihilation of edge dipoles by climb
rhoDotThermalAnnihilation = 0.0_pReal
selfDiffusion = prm%Dsd0 * exp(-prm%selfDiffusionEnergy / (kB * Temperature))
vClimb = prm%atomicVolume * selfDiffusion * prm%mu &
/ ( kB * Temperature * PI * (1.0_pReal-prm%nu) * (dUpper(:,1) + dLower(:,1)))
forall (s = 1:ns, dUpper(s,1) > dLower(s,1)) &
rhoDotThermalAnnihilation(s,9) = max(- 4.0_pReal * rhoDip(s,1) * vClimb(s) / (dUpper(s,1) - dLower(s,1)), &
- rhoDip(s,1) / timestep - rhoDotAthermalAnnihilation(s,9) &
- rhoDotSingle2DipoleGlide(s,9)) ! make sure that we do not annihilate more dipoles than we have
rhoDot = rhoDotFlux &
+ rhoDotMultiplication &
+ rhoDotSingle2DipoleGlide &
+ rhoDotAthermalAnnihilation &
+ rhoDotThermalAnnihilation
#ifdef DEBUG
if (iand(debug_level(debug_constitutive),debug_levelExtensive) /= 0 &
.and. ((debug_e == el .and. debug_i == ip)&
.or. .not. iand(debug_level(debug_constitutive),debug_levelSelective) /= 0 )) then
write(6,'(a,/,4(12x,12(e12.5,1x),/))') '<< CONST >> dislocation multiplication', &
rhoDotMultiplication(:,1:4) * timestep
write(6,'(a,/,8(12x,12(e12.5,1x),/))') '<< CONST >> dislocation flux', &
rhoDotFlux(:,1:8) * timestep
write(6,'(a,/,10(12x,12(e12.5,1x),/))') '<< CONST >> dipole formation by glide', &
rhoDotSingle2DipoleGlide * timestep
write(6,'(a,/,10(12x,12(e12.5,1x),/))') '<< CONST >> athermal dipole annihilation', &
rhoDotAthermalAnnihilation * timestep
write(6,'(a,/,2(12x,12(e12.5,1x),/))') '<< CONST >> thermally activated dipole annihilation', &
rhoDotThermalAnnihilation(:,9:10) * timestep
write(6,'(a,/,10(12x,12(e12.5,1x),/))') '<< CONST >> total density change', &
rhoDot * timestep
write(6,'(a,/,10(12x,12(f12.5,1x),/))') '<< CONST >> relative density change', &
rhoDot(:,1:8) * timestep / (abs(stt%rho(:,sgl))+1.0e-10), &
rhoDot(:,9:10) * timestep / (stt%rho(:,dip)+1.0e-10)
write(6,*)
endif
#endif
if ( any(rho(:,mob) + rhoDot(:,1:4) * timestep < -prm%atol_rho) &
.or. any(rho(:,dip) + rhoDot(:,9:10) * timestep < -prm%atol_rho)) then
#ifdef DEBUG
if (iand(debug_level(debug_constitutive),debug_levelExtensive) /= 0) then
write(6,'(a,i5,a,i2)') '<< CONST >> evolution rate leads to negative density at el ',el,' ip ',ip
write(6,'(a)') '<< CONST >> enforcing cutback !!!'
endif
#endif
plasticState(ph)%dotState = IEEE_value(1.0_pReal,IEEE_quiet_NaN)
else
dot%rho(:,of) = pack(rhoDot,.true.)
dot%gamma(:,of) = sum(gdot,2)
endif
end associate
end subroutine plastic_nonlocal_dotState2
!--------------------------------------------------------------------------------------------------
!> @brief Compatibility update
!> @detail Compatibility is defined as normalized product of signed cosine of the angle between the slip