DAMASK_EICMD/src/CPFEM.f90

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!--------------------------------------------------------------------------------------------------
!> @author Franz Roters, Max-Planck-Institut für Eisenforschung GmbH
!> @author Philip Eisenlohr, Max-Planck-Institut für Eisenforschung GmbH
!> @brief CPFEM engine
!--------------------------------------------------------------------------------------------------
module CPFEM
use prec
use numerics
use debug
use FEsolving
use math
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use rotations
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use discretization_marc
use material
use config
use crystallite
use homogenization
use IO
use discretization
use DAMASK_interface
use numerics
use HDF5_utilities
use results
use lattice
use constitutive
implicit none
private
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real(pReal), dimension (:,:,:), allocatable, private :: &
CPFEM_cs !< Cauchy stress
real(pReal), dimension (:,:,:,:), allocatable, private :: &
CPFEM_dcsdE !< Cauchy stress tangent
real(pReal), dimension (:,:,:,:), allocatable, private :: &
CPFEM_dcsdE_knownGood !< known good tangent
integer(pInt), public :: &
cycleCounter = 0_pInt, & !< needs description
theInc = -1_pInt, & !< needs description
lastLovl = 0_pInt !< lovl in previous call to marc hypela2
real(pReal), public :: &
theTime = 0.0_pReal, & !< needs description
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theDelta = 0.0_pReal
logical, public :: &
outdatedFFN1 = .false., & !< needs description
lastIncConverged = .false., & !< needs description
outdatedByNewInc = .false. !< needs description
logical, public, protected :: &
CPFEM_init_done = .false. !< remember whether init has been done already
logical, private :: &
CPFEM_calc_done = .false. !< remember whether first ip has already calced the results
integer(pInt), parameter, public :: &
CPFEM_COLLECT = 2_pInt**0_pInt, &
CPFEM_CALCRESULTS = 2_pInt**1_pInt, &
CPFEM_AGERESULTS = 2_pInt**2_pInt, &
CPFEM_BACKUPJACOBIAN = 2_pInt**3_pInt, &
CPFEM_RESTOREJACOBIAN = 2_pInt**4_pInt
public :: &
CPFEM_general, &
CPFEM_initAll, &
CPFEM_results
contains
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!--------------------------------------------------------------------------------------------------
!> @brief call (thread safe) all module initializations
!--------------------------------------------------------------------------------------------------
subroutine CPFEM_initAll(el,ip)
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integer(pInt), intent(in) :: el, & !< FE el number
ip !< FE integration point number
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CPFEM_init_done = .true.
call DAMASK_interface_init
call prec_init
call IO_init
call numerics_init
call debug_init
call config_init
call math_init
call rotations_init
call HDF5_utilities_init
call results_init
call discretization_marc_init(ip, el)
call lattice_init
call material_init
call constitutive_init
call crystallite_init
call homogenization_init
call CPFEM_init
end subroutine CPFEM_initAll
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!--------------------------------------------------------------------------------------------------
!> @brief allocate the arrays defined in module CPFEM and initialize them
!--------------------------------------------------------------------------------------------------
subroutine CPFEM_init
write(6,'(/,a)') ' <<<+- CPFEM init -+>>>'
flush(6)
allocate(CPFEM_cs( 6,discretization_nIP,discretization_nElem), source= 0.0_pReal)
allocate(CPFEM_dcsdE( 6,6,discretization_nIP,discretization_nElem), source= 0.0_pReal)
allocate(CPFEM_dcsdE_knownGood(6,6,discretization_nIP,discretization_nElem), source= 0.0_pReal)
if (iand(debug_level(debug_CPFEM), debug_levelBasic) /= 0) then
write(6,'(a32,1x,6(i8,1x))') 'CPFEM_cs: ', shape(CPFEM_cs)
write(6,'(a32,1x,6(i8,1x))') 'CPFEM_dcsdE: ', shape(CPFEM_dcsdE)
write(6,'(a32,1x,6(i8,1x),/)') 'CPFEM_dcsdE_knownGood: ', shape(CPFEM_dcsdE_knownGood)
flush(6)
endif
end subroutine CPFEM_init
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!--------------------------------------------------------------------------------------------------
!> @brief perform initialization at first call, update variables and call the actual material model
!--------------------------------------------------------------------------------------------------
subroutine CPFEM_general(mode, parallelExecution, ffn, ffn1, temperature_inp, dt, elFE, ip, cauchyStress, jacobian)
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integer(pInt), intent(in) :: elFE, & !< FE element number
ip !< integration point number
real(pReal), intent(in) :: dt !< time increment
real(pReal), dimension (3,3), intent(in) :: ffn, & !< deformation gradient for t=t0
ffn1 !< deformation gradient for t=t1
integer(pInt), intent(in) :: mode !< computation mode 1: regular computation plus aging of results
real(pReal), intent(in) :: temperature_inp !< temperature
logical, intent(in) :: parallelExecution !< flag indicating parallel computation of requested IPs
real(pReal), dimension(6), intent(out) :: cauchyStress !< stress as 6 vector
real(pReal), dimension(6,6), intent(out) :: jacobian !< jacobian as 66 tensor (Consistent tangent dcs/dE)
real(pReal) J_inverse, & ! inverse of Jacobian
rnd
real(pReal), dimension (3,3) :: Kirchhoff, & ! Piola-Kirchhoff stress
cauchyStress33 ! stress vector
real(pReal), dimension (3,3,3,3) :: H_sym, &
H, &
jacobian3333 ! jacobian in Matrix notation
integer(pInt) elCP, & ! crystal plasticity element number
i, j, k, l, m, n, ph, homog, mySource
logical updateJaco ! flag indicating if Jacobian has to be updated
real(pReal), parameter :: ODD_STRESS = 1e15_pReal, & !< return value for stress in case of ping pong dummy cycle
ODD_JACOBIAN = 1e50_pReal !< return value for jacobian in case of ping pong dummy cycle
elCP = mesh_FEM2DAMASK_elem(elFE)
if (iand(debug_level(debug_CPFEM), debug_levelBasic) /= 0_pInt &
.and. elCP == debug_e .and. ip == debug_i) then
write(6,'(/,a)') '#############################################'
write(6,'(a1,a22,1x,i8,a13)') '#','element', elCP, '#'
write(6,'(a1,a22,1x,i8,a13)') '#','ip', ip, '#'
write(6,'(a1,a22,1x,f15.7,a6)') '#','theTime', theTime, '#'
write(6,'(a1,a22,1x,f15.7,a6)') '#','theDelta', theDelta, '#'
write(6,'(a1,a22,1x,i8,a13)') '#','theInc', theInc, '#'
write(6,'(a1,a22,1x,i8,a13)') '#','cycleCounter', cycleCounter, '#'
write(6,'(a1,a22,1x,i8,a13)') '#','computationMode',mode, '#'
if (terminallyIll) &
write(6,'(a,/)') '# --- terminallyIll --- #'
write(6,'(a,/)') '#############################################'; flush (6)
endif
if (iand(mode, CPFEM_BACKUPJACOBIAN) /= 0_pInt) &
CPFEM_dcsde_knownGood = CPFEM_dcsde
if (iand(mode, CPFEM_RESTOREJACOBIAN) /= 0_pInt) &
CPFEM_dcsde = CPFEM_dcsde_knownGood
!*** age results
if (iand(mode, CPFEM_AGERESULTS) /= 0_pInt) call CPFEM_forward
!*** collection of FEM input with returning of randomize odd stress and jacobian
!* If no parallel execution is required, there is no need to collect FEM input
if (.not. parallelExecution) then
chosenThermal1: select case (thermal_type(material_homogenizationAt(elCP)))
case (THERMAL_conduction_ID) chosenThermal1
temperature(material_homogenizationAt(elCP))%p(thermalMapping(material_homogenizationAt(elCP))%p(ip,elCP)) = &
temperature_inp
end select chosenThermal1
materialpoint_F0(1:3,1:3,ip,elCP) = ffn
materialpoint_F(1:3,1:3,ip,elCP) = ffn1
elseif (iand(mode, CPFEM_COLLECT) /= 0_pInt) then
call random_number(rnd)
if (rnd < 0.5_pReal) rnd = rnd - 1.0_pReal
CPFEM_cs(1:6,ip,elCP) = rnd * ODD_STRESS
CPFEM_dcsde(1:6,1:6,ip,elCP) = ODD_JACOBIAN * math_identity2nd(6)
chosenThermal2: select case (thermal_type(material_homogenizationAt(elCP)))
case (THERMAL_conduction_ID) chosenThermal2
temperature(material_homogenizationAt(elCP))%p(thermalMapping(material_homogenizationAt(elCP))%p(ip,elCP)) = &
temperature_inp
end select chosenThermal2
materialpoint_F0(1:3,1:3,ip,elCP) = ffn
materialpoint_F(1:3,1:3,ip,elCP) = ffn1
CPFEM_calc_done = .false.
endif
!*** calculation of stress and jacobian
if (iand(mode, CPFEM_CALCRESULTS) /= 0_pInt) then
!*** deformation gradient outdated or any actual deformation gradient differs more than relevantStrain from the stored one
validCalculation: if (terminallyIll &
.or. outdatedFFN1 &
.or. any(abs(ffn1 - materialpoint_F(1:3,1:3,ip,elCP)) > defgradTolerance)) then
if (any(abs(ffn1 - materialpoint_F(1:3,1:3,ip,elCP)) > defgradTolerance)) then
if (iand(debug_level(debug_CPFEM), debug_levelBasic) /= 0_pInt) then
write(6,'(a,1x,i8,1x,i2)') '<< CPFEM >> OUTDATED at elFE ip',elFE,ip
write(6,'(a,/,3(12x,3(f10.6,1x),/))') '<< CPFEM >> FFN1 old:',&
transpose(materialpoint_F(1:3,1:3,ip,elCP))
write(6,'(a,/,3(12x,3(f10.6,1x),/))') '<< CPFEM >> FFN1 now:',transpose(ffn1)
endif
outdatedFFN1 = .true.
endif
call random_number(rnd)
if (rnd < 0.5_pReal) rnd = rnd - 1.0_pReal
CPFEM_cs(1:6,ip,elCP) = ODD_STRESS * rnd
CPFEM_dcsde(1:6,1:6,ip,elCP) = ODD_JACOBIAN * math_identity2nd(6)
!*** deformation gradient is not outdated
else validCalculation
updateJaco = mod(cycleCounter,iJacoStiffness) == 0
!* no parallel computation, so we use just one single elFE and ip for computation
if (.not. parallelExecution) then
FEsolving_execElem = elCP
FEsolving_execIP = ip
if (iand(debug_level(debug_CPFEM), debug_levelExtensive) /= 0_pInt) &
write(6,'(a,i8,1x,i2)') '<< CPFEM >> calculation for elFE ip ',elFE,ip
call materialpoint_stressAndItsTangent(updateJaco, dt)
!* parallel computation and calulation not yet done
elseif (.not. CPFEM_calc_done) then
if (iand(debug_level(debug_CPFEM), debug_levelExtensive) /= 0_pInt) &
write(6,'(a,i8,a,i8)') '<< CPFEM >> calculation for elements ',FEsolving_execElem(1),&
' to ',FEsolving_execElem(2)
call materialpoint_stressAndItsTangent(updateJaco, dt)
CPFEM_calc_done = .true.
endif
!* map stress and stiffness (or return odd values if terminally ill)
terminalIllness: if (terminallyIll) then
call random_number(rnd)
if (rnd < 0.5_pReal) rnd = rnd - 1.0_pReal
CPFEM_cs(1:6,ip,elCP) = ODD_STRESS * rnd
CPFEM_dcsde(1:6,1:6,ip,elCP) = ODD_JACOBIAN * math_identity2nd(6)
else terminalIllness
! translate from P to CS
Kirchhoff = matmul(materialpoint_P(1:3,1:3,ip,elCP), transpose(materialpoint_F(1:3,1:3,ip,elCP)))
J_inverse = 1.0_pReal / math_det33(materialpoint_F(1:3,1:3,ip,elCP))
CPFEM_cs(1:6,ip,elCP) = math_sym33to6(J_inverse * Kirchhoff,weighted=.false.)
! translate from dP/dF to dCS/dE
H = 0.0_pReal
do i=1,3; do j=1,3; do k=1,3; do l=1,3; do m=1,3; do n=1,3
H(i,j,k,l) = H(i,j,k,l) &
+ materialpoint_F(j,m,ip,elCP) * materialpoint_F(l,n,ip,elCP) &
* materialpoint_dPdF(i,m,k,n,ip,elCP) &
- math_delta(j,l) * materialpoint_F(i,m,ip,elCP) * materialpoint_P(k,m,ip,elCP) &
+ 0.5_pReal * ( Kirchhoff(j,l)*math_delta(i,k) + Kirchhoff(i,k)*math_delta(j,l) &
+ Kirchhoff(j,k)*math_delta(i,l) + Kirchhoff(i,l)*math_delta(j,k))
enddo; enddo; enddo; enddo; enddo; enddo
forall(i=1:3, j=1:3,k=1:3,l=1:3) &
H_sym(i,j,k,l) = 0.25_pReal * (H(i,j,k,l) + H(j,i,k,l) + H(i,j,l,k) + H(j,i,l,k))
CPFEM_dcsde(1:6,1:6,ip,elCP) = math_sym3333to66(J_inverse * H_sym,weighted=.false.)
endif terminalIllness
endif validCalculation
!* report stress and stiffness
if ((iand(debug_level(debug_CPFEM), debug_levelExtensive) /= 0_pInt) &
.and. ((debug_e == elCP .and. debug_i == ip) &
.or. .not. iand(debug_level(debug_CPFEM), debug_levelSelective) /= 0_pInt)) then
write(6,'(a,i8,1x,i2,/,12x,6(f10.3,1x)/)') &
'<< CPFEM >> stress/MPa at elFE ip ', elFE, ip, CPFEM_cs(1:6,ip,elCP)*1.0e-6_pReal
write(6,'(a,i8,1x,i2,/,6(12x,6(f10.3,1x)/))') &
'<< CPFEM >> Jacobian/GPa at elFE ip ', elFE, ip, transpose(CPFEM_dcsdE(1:6,1:6,ip,elCP))*1.0e-9_pReal
flush(6)
endif
endif
!*** warn if stiffness close to zero
if (all(abs(CPFEM_dcsdE(1:6,1:6,ip,elCP)) < 1e-10_pReal)) call IO_warning(601,elCP,ip)
!*** copy to output if using commercial FEM solver
cauchyStress = CPFEM_cs (1:6, ip,elCP)
jacobian = CPFEM_dcsdE(1:6,1:6,ip,elCP)
!*** remember extreme values of stress ...
cauchyStress33 = math_6toSym33(CPFEM_cs(1:6,ip,elCP),weighted=.false.)
if (maxval(cauchyStress33) > debug_stressMax) then
debug_stressMaxLocation = [elCP, ip]
debug_stressMax = maxval(cauchyStress33)
endif
if (minval(cauchyStress33) < debug_stressMin) then
debug_stressMinLocation = [elCP, ip]
debug_stressMin = minval(cauchyStress33)
endif
!*** ... and Jacobian
jacobian3333 = math_66toSym3333(CPFEM_dcsdE(1:6,1:6,ip,elCP),weighted=.false.)
if (maxval(jacobian3333) > debug_jacobianMax) then
debug_jacobianMaxLocation = [elCP, ip]
debug_jacobianMax = maxval(jacobian3333)
endif
if (minval(jacobian3333) < debug_jacobianMin) then
debug_jacobianMinLocation = [elCP, ip]
debug_jacobianMin = minval(jacobian3333)
endif
end subroutine CPFEM_general
!--------------------------------------------------------------------------------------------------
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!> @brief Forward data for new time increment.
!--------------------------------------------------------------------------------------------------
subroutine CPFEM_forward
call crystallite_forward
end subroutine CPFEM_forward
!--------------------------------------------------------------------------------------------------
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!> @brief Trigger writing of results.
!--------------------------------------------------------------------------------------------------
subroutine CPFEM_results(inc,time)
integer(pInt), intent(in) :: inc
real(pReal), intent(in) :: time
call results_openJobFile
call results_addIncrement(inc,time)
call constitutive_results
call crystallite_results
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call homogenization_results
call discretization_results
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call results_finalizeIncrement
call results_closeJobFile
end subroutine CPFEM_results
end module CPFEM