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!--------------------------------------------------------------------------------------------------
!> @author Pratheek Shanthraj, Max-Planck-Institut für Eisenforschung GmbH
!> @brief material subroutine for phase field modelling of pore nucleation and growth
!> @details phase field model for pore nucleation and growth based on vacancy clustering
!--------------------------------------------------------------------------------------------------
module porosity_phasefield
use prec , only : &
pReal , &
pInt
implicit none
private
integer ( pInt ) , dimension ( : ) , allocatable , public , protected :: &
porosity_phasefield_sizePostResults !< cumulative size of post results
integer ( pInt ) , dimension ( : , : ) , allocatable , target , public :: &
porosity_phasefield_sizePostResult !< size of each post result output
character ( len = 64 ) , dimension ( : , : ) , allocatable , target , public :: &
porosity_phasefield_output !< name of each post result output
integer ( pInt ) , dimension ( : ) , allocatable , target , public :: &
porosity_phasefield_Noutput !< number of outputs per instance of this porosity
enum , bind ( c )
enumerator :: undefined_ID , &
porosity_ID
end enum
integer ( kind ( undefined_ID ) ) , dimension ( : , : ) , allocatable , private :: &
porosity_phasefield_outputID !< ID of each post result output
public :: &
porosity_phasefield_init , &
porosity_phasefield_getFormationEnergy , &
porosity_phasefield_getSurfaceEnergy , &
porosity_phasefield_getSourceAndItsTangent , &
porosity_phasefield_getDiffusion33 , &
porosity_phasefield_getMobility , &
porosity_phasefield_putPorosity , &
porosity_phasefield_postResults
contains
!--------------------------------------------------------------------------------------------------
!> @brief module initialization
!> @details reads in material parameters, allocates arrays, and does sanity checks
!--------------------------------------------------------------------------------------------------
subroutine porosity_phasefield_init ( fileUnit )
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#if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800
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use , intrinsic :: iso_fortran_env , only : &
compiler_version , &
compiler_options
#endif
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use IO , only : &
IO_read , &
IO_lc , &
IO_getTag , &
IO_isBlank , &
IO_stringPos , &
IO_stringValue , &
IO_floatValue , &
IO_intValue , &
IO_warning , &
IO_error , &
IO_timeStamp , &
IO_EOF
use material , only : &
porosity_type , &
porosity_typeInstance , &
homogenization_Noutput , &
POROSITY_phasefield_label , &
POROSITY_phasefield_ID , &
material_homog , &
mappingHomogenization , &
porosityState , &
porosityMapping , &
porosity , &
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porosity_initialPhi
use config_material , only : &
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material_partHomogenization , &
material_partPhase
implicit none
integer ( pInt ) , intent ( in ) :: fileUnit
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integer ( pInt ) , allocatable , dimension ( : ) :: chunkPos
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integer ( pInt ) :: maxNinstance , mySize = 0_pInt , section , instance , o
integer ( pInt ) :: sizeState
integer ( pInt ) :: NofMyHomog
character ( len = 65536 ) :: &
tag = '' , &
line = ''
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write ( 6 , '(/,a)' ) ' <<<+- porosity_' / / POROSITY_phasefield_label / / ' init -+>>>'
write ( 6 , '(a15,a)' ) ' Current time: ' , IO_timeStamp ( )
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#include "compilation_info.f90"
maxNinstance = int ( count ( porosity_type == POROSITY_phasefield_ID ) , pInt )
if ( maxNinstance == 0_pInt ) return
allocate ( porosity_phasefield_sizePostResults ( maxNinstance ) , source = 0_pInt )
allocate ( porosity_phasefield_sizePostResult ( maxval ( homogenization_Noutput ) , maxNinstance ) , source = 0_pInt )
allocate ( porosity_phasefield_output ( maxval ( homogenization_Noutput ) , maxNinstance ) )
porosity_phasefield_output = ''
allocate ( porosity_phasefield_outputID ( maxval ( homogenization_Noutput ) , maxNinstance ) , source = undefined_ID )
allocate ( porosity_phasefield_Noutput ( maxNinstance ) , source = 0_pInt )
rewind ( fileUnit )
section = 0_pInt
do while ( trim ( line ) / = IO_EOF . and . IO_lc ( IO_getTag ( line , '<' , '>' ) ) / = material_partHomogenization ) ! wind forward to <homogenization>
line = IO_read ( fileUnit )
enddo
parsingHomog : do while ( trim ( line ) / = IO_EOF ) ! read through sections of homog part
line = IO_read ( fileUnit )
if ( IO_isBlank ( line ) ) cycle ! skip empty lines
if ( IO_getTag ( line , '<' , '>' ) / = '' ) then ! stop at next part
line = IO_read ( fileUnit , . true . ) ! reset IO_read
exit
endif
if ( IO_getTag ( line , '[' , ']' ) / = '' ) then ! next homog section
section = section + 1_pInt ! advance homog section counter
cycle ! skip to next line
endif
if ( section > 0_pInt ) then ; if ( porosity_type ( section ) == POROSITY_phasefield_ID ) then ! do not short-circuit here (.and. with next if statemen). It's not safe in Fortran
instance = porosity_typeInstance ( section ) ! which instance of my porosity is present homog
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chunkPos = IO_stringPos ( line )
tag = IO_lc ( IO_stringValue ( line , chunkPos , 1_pInt ) ) ! extract key
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select case ( tag )
case ( '(output)' )
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select case ( IO_lc ( IO_stringValue ( line , chunkPos , 2_pInt ) ) )
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case ( 'porosity' )
porosity_phasefield_Noutput ( instance ) = porosity_phasefield_Noutput ( instance ) + 1_pInt
porosity_phasefield_outputID ( porosity_phasefield_Noutput ( instance ) , instance ) = porosity_ID
porosity_phasefield_output ( porosity_phasefield_Noutput ( instance ) , instance ) = &
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IO_lc ( IO_stringValue ( line , chunkPos , 2_pInt ) )
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end select
end select
endif ; endif
enddo parsingHomog
initializeInstances : do section = 1_pInt , size ( porosity_type )
if ( porosity_type ( section ) == POROSITY_phasefield_ID ) then
NofMyHomog = count ( material_homog == section )
instance = porosity_typeInstance ( section )
!--------------------------------------------------------------------------------------------------
! Determine size of postResults array
outputsLoop : do o = 1_pInt , porosity_phasefield_Noutput ( instance )
select case ( porosity_phasefield_outputID ( o , instance ) )
case ( porosity_ID )
mySize = 1_pInt
end select
if ( mySize > 0_pInt ) then ! any meaningful output found
porosity_phasefield_sizePostResult ( o , instance ) = mySize
porosity_phasefield_sizePostResults ( instance ) = porosity_phasefield_sizePostResults ( instance ) + mySize
endif
enddo outputsLoop
! allocate state arrays
sizeState = 0_pInt
porosityState ( section ) % sizeState = sizeState
porosityState ( section ) % sizePostResults = porosity_phasefield_sizePostResults ( instance )
allocate ( porosityState ( section ) % state0 ( sizeState , NofMyHomog ) )
allocate ( porosityState ( section ) % subState0 ( sizeState , NofMyHomog ) )
allocate ( porosityState ( section ) % state ( sizeState , NofMyHomog ) )
nullify ( porosityMapping ( section ) % p )
porosityMapping ( section ) % p = > mappingHomogenization ( 1 , : , : )
deallocate ( porosity ( section ) % p )
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allocate ( porosity ( section ) % p ( NofMyHomog ) , source = porosity_initialPhi ( section ) )
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endif
enddo initializeInstances
end subroutine porosity_phasefield_init
!--------------------------------------------------------------------------------------------------
!> @brief returns homogenized vacancy formation energy
!--------------------------------------------------------------------------------------------------
function porosity_phasefield_getFormationEnergy ( ip , el )
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use lattice , only : &
lattice_vacancyFormationEnergy , &
lattice_vacancyVol
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use material , only : &
homogenization_Ngrains , &
material_phase
use mesh , only : &
mesh_element
implicit none
integer ( pInt ) , intent ( in ) :: &
ip , & !< integration point number
el !< element number
real ( pReal ) :: &
porosity_phasefield_getFormationEnergy
integer ( pInt ) :: &
grain
porosity_phasefield_getFormationEnergy = 0.0_pReal
do grain = 1 , homogenization_Ngrains ( mesh_element ( 3 , el ) )
porosity_phasefield_getFormationEnergy = porosity_phasefield_getFormationEnergy + &
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lattice_vacancyFormationEnergy ( material_phase ( grain , ip , el ) ) / &
lattice_vacancyVol ( material_phase ( grain , ip , el ) )
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enddo
porosity_phasefield_getFormationEnergy = &
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porosity_phasefield_getFormationEnergy / real ( homogenization_Ngrains ( mesh_element ( 3 , el ) ) , pReal )
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end function porosity_phasefield_getFormationEnergy
!--------------------------------------------------------------------------------------------------
!> @brief returns homogenized pore surface energy (normalized by characteristic length)
!--------------------------------------------------------------------------------------------------
function porosity_phasefield_getSurfaceEnergy ( ip , el )
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use lattice , only : &
lattice_vacancySurfaceEnergy
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use material , only : &
homogenization_Ngrains , &
material_phase
use mesh , only : &
mesh_element
implicit none
integer ( pInt ) , intent ( in ) :: &
ip , & !< integration point number
el !< element number
real ( pReal ) :: &
porosity_phasefield_getSurfaceEnergy
integer ( pInt ) :: &
grain
porosity_phasefield_getSurfaceEnergy = 0.0_pReal
do grain = 1 , homogenization_Ngrains ( mesh_element ( 3 , el ) )
porosity_phasefield_getSurfaceEnergy = porosity_phasefield_getSurfaceEnergy + &
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lattice_vacancySurfaceEnergy ( material_phase ( grain , ip , el ) )
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enddo
porosity_phasefield_getSurfaceEnergy = &
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porosity_phasefield_getSurfaceEnergy / real ( homogenization_Ngrains ( mesh_element ( 3 , el ) ) , pReal )
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end function porosity_phasefield_getSurfaceEnergy
!--------------------------------------------------------------------------------------------------
!> @brief calculates homogenized local driving force for pore nucleation and growth
!--------------------------------------------------------------------------------------------------
subroutine porosity_phasefield_getSourceAndItsTangent ( phiDot , dPhiDot_dPhi , phi , ip , el )
use math , only : &
math_mul33x33 , &
math_mul66x6 , &
math_Mandel33to6 , &
math_transpose33 , &
math_I3
use material , only : &
homogenization_Ngrains , &
material_homog , &
material_phase , &
phase_NstiffnessDegradations , &
phase_stiffnessDegradation , &
vacancyConc , &
vacancyfluxMapping , &
damage , &
damageMapping , &
STIFFNESS_DEGRADATION_damage_ID
use crystallite , only : &
crystallite_Fe
use constitutive , only : &
constitutive_homogenizedC
implicit none
integer ( pInt ) , intent ( in ) :: &
ip , & !< integration point number
el !< element number
real ( pReal ) , intent ( in ) :: &
phi
integer ( pInt ) :: &
phase , &
grain , &
homog , &
mech
real ( pReal ) :: &
phiDot , dPhiDot_dPhi , Cv , W_e , strain ( 6 ) , C ( 6 , 6 )
homog = material_homog ( ip , el )
Cv = vacancyConc ( homog ) % p ( vacancyfluxMapping ( homog ) % p ( ip , el ) )
W_e = 0.0_pReal
do grain = 1 , homogenization_Ngrains ( homog )
phase = material_phase ( grain , ip , el )
strain = math_Mandel33to6 ( math_mul33x33 ( math_transpose33 ( crystallite_Fe ( 1 : 3 , 1 : 3 , grain , ip , el ) ) , &
crystallite_Fe ( 1 : 3 , 1 : 3 , grain , ip , el ) ) - math_I3 ) / 2.0_pReal
C = constitutive_homogenizedC ( grain , ip , el )
do mech = 1_pInt , phase_NstiffnessDegradations ( phase )
select case ( phase_stiffnessDegradation ( mech , phase ) )
case ( STIFFNESS_DEGRADATION_damage_ID )
C = damage ( homog ) % p ( damageMapping ( homog ) % p ( ip , el ) ) * &
damage ( homog ) % p ( damageMapping ( homog ) % p ( ip , el ) ) * &
C
end select
enddo
W_e = W_e + sum ( abs ( strain * math_mul66x6 ( C , strain ) ) )
enddo
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W_e = W_e / real ( homogenization_Ngrains ( homog ) , pReal )
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phiDot = 2.0_pReal * ( 1.0_pReal - phi ) * ( 1.0_pReal - Cv ) * ( 1.0_pReal - Cv ) - &
2.0_pReal * phi * ( W_e + Cv * porosity_phasefield_getFormationEnergy ( ip , el ) ) / &
porosity_phasefield_getSurfaceEnergy ( ip , el )
dPhiDot_dPhi = - 2.0_pReal * ( 1.0_pReal - Cv ) * ( 1.0_pReal - Cv ) &
- 2.0_pReal * ( W_e + Cv * porosity_phasefield_getFormationEnergy ( ip , el ) ) / &
porosity_phasefield_getSurfaceEnergy ( ip , el )
end subroutine porosity_phasefield_getSourceAndItsTangent
!--------------------------------------------------------------------------------------------------
!> @brief returns homogenized nonlocal diffusion tensor in reference configuration
!--------------------------------------------------------------------------------------------------
function porosity_phasefield_getDiffusion33 ( ip , el )
use lattice , only : &
lattice_PorosityDiffusion33
use material , only : &
homogenization_Ngrains , &
material_phase , &
mappingHomogenization
use crystallite , only : &
crystallite_push33ToRef
implicit none
integer ( pInt ) , intent ( in ) :: &
ip , & !< integration point number
el !< element number
real ( pReal ) , dimension ( 3 , 3 ) :: &
porosity_phasefield_getDiffusion33
integer ( pInt ) :: &
homog , &
grain
homog = mappingHomogenization ( 2 , ip , el )
porosity_phasefield_getDiffusion33 = 0.0_pReal
do grain = 1 , homogenization_Ngrains ( homog )
porosity_phasefield_getDiffusion33 = porosity_phasefield_getDiffusion33 + &
crystallite_push33ToRef ( grain , ip , el , lattice_PorosityDiffusion33 ( 1 : 3 , 1 : 3 , material_phase ( grain , ip , el ) ) )
enddo
porosity_phasefield_getDiffusion33 = &
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porosity_phasefield_getDiffusion33 / real ( homogenization_Ngrains ( homog ) , pReal )
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end function porosity_phasefield_getDiffusion33
!--------------------------------------------------------------------------------------------------
!> @brief Returns homogenized phase field mobility
!--------------------------------------------------------------------------------------------------
real ( pReal ) function porosity_phasefield_getMobility ( ip , el )
use mesh , only : &
mesh_element
use lattice , only : &
lattice_PorosityMobility
use material , only : &
material_phase , &
homogenization_Ngrains
implicit none
integer ( pInt ) , intent ( in ) :: &
ip , & !< integration point number
el !< element number
integer ( pInt ) :: &
ipc
porosity_phasefield_getMobility = 0.0_pReal
do ipc = 1 , homogenization_Ngrains ( mesh_element ( 3 , el ) )
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porosity_phasefield_getMobility = porosity_phasefield_getMobility &
+ lattice_PorosityMobility ( material_phase ( ipc , ip , el ) )
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enddo
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porosity_phasefield_getMobility = &
porosity_phasefield_getMobility / real ( homogenization_Ngrains ( mesh_element ( 3 , el ) ) , pReal )
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end function porosity_phasefield_getMobility
!--------------------------------------------------------------------------------------------------
!> @brief updates porosity with solution from phasefield PDE
!--------------------------------------------------------------------------------------------------
subroutine porosity_phasefield_putPorosity ( phi , ip , el )
use material , only : &
material_homog , &
porosityMapping , &
porosity
implicit none
integer ( pInt ) , intent ( in ) :: &
ip , & !< integration point number
el !< element number
real ( pReal ) , intent ( in ) :: &
phi
integer ( pInt ) :: &
homog , &
offset
homog = material_homog ( ip , el )
offset = porosityMapping ( homog ) % p ( ip , el )
porosity ( homog ) % p ( offset ) = phi
end subroutine porosity_phasefield_putPorosity
!--------------------------------------------------------------------------------------------------
!> @brief return array of porosity results
!--------------------------------------------------------------------------------------------------
function porosity_phasefield_postResults ( ip , el )
use material , only : &
mappingHomogenization , &
porosity_typeInstance , &
porosity
implicit none
integer ( pInt ) , intent ( in ) :: &
ip , & !< integration point
el !< element
real ( pReal ) , dimension ( porosity_phasefield_sizePostResults ( porosity_typeInstance ( mappingHomogenization ( 2 , ip , el ) ) ) ) :: &
porosity_phasefield_postResults
integer ( pInt ) :: &
instance , homog , offset , o , c
homog = mappingHomogenization ( 2 , ip , el )
offset = mappingHomogenization ( 1 , ip , el )
instance = porosity_typeInstance ( homog )
c = 0_pInt
porosity_phasefield_postResults = 0.0_pReal
do o = 1_pInt , porosity_phasefield_Noutput ( instance )
select case ( porosity_phasefield_outputID ( o , instance ) )
case ( porosity_ID )
porosity_phasefield_postResults ( c + 1_pInt ) = porosity ( homog ) % p ( offset )
c = c + 1
end select
enddo
end function porosity_phasefield_postResults
end module porosity_phasefield