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DAMASK_EICMD
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DAMASK_EICMD/code/kinematics_hydrogen_strain.f90

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Fortran
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!--------------------------------------------------------------------------------------------------
!> @author Pratheek Shanthraj, Max-Planck-Institut für Eisenforschung GmbH
!> @brief material subroutine incorporating kinematics resulting from interstitial hydrogen
!> @details to be done
!--------------------------------------------------------------------------------------------------
module kinematics_hydrogen_strain
use prec, only: &
pReal, &
pInt
implicit none
private
integer(pInt), dimension(:), allocatable, public, protected :: &
kinematics_hydrogen_strain_sizePostResults, & !< cumulative size of post results
kinematics_hydrogen_strain_offset, & !< which kinematics is my current damage mechanism?
kinematics_hydrogen_strain_instance !< instance of damage kinematics mechanism
integer(pInt), dimension(:,:), allocatable, target, public :: &
kinematics_hydrogen_strain_sizePostResult !< size of each post result output
character(len=64), dimension(:,:), allocatable, target, public :: &
kinematics_hydrogen_strain_output !< name of each post result output
integer(pInt), dimension(:), allocatable, target, public :: &
kinematics_hydrogen_strain_Noutput !< number of outputs per instance of this damage
real(pReal), dimension(:), allocatable, private :: &
kinematics_hydrogen_strain_coeff
public :: &
kinematics_hydrogen_strain_init, &
kinematics_hydrogen_strain_initialStrain, &
kinematics_hydrogen_strain_LiAndItsTangent, &
kinematics_hydrogen_strain_ChemPotAndItsTangent
contains
!--------------------------------------------------------------------------------------------------
!> @brief module initialization
!> @details reads in material parameters, allocates arrays, and does sanity checks
!--------------------------------------------------------------------------------------------------
subroutine kinematics_hydrogen_strain_init(fileUnit)
use, intrinsic :: iso_fortran_env ! to get compiler_version and compiler_options (at least for gfortran 4.6 at the moment)
use debug, only: &
debug_level,&
debug_constitutive,&
debug_levelBasic
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: &
phase_kinematics, &
phase_Nkinematics, &
phase_Noutput, &
KINEMATICS_hydrogen_strain_label, &
KINEMATICS_hydrogen_strain_ID, &
material_Nphase, &
MATERIAL_partPhase
implicit none
integer(pInt), intent(in) :: fileUnit
integer(pInt), allocatable, dimension(:) :: chunkPos
integer(pInt) :: maxNinstance,phase,instance,kinematics
character(len=65536) :: &
tag = '', &
line = ''
write(6,'(/,a)') ' <<<+- kinematics_'//KINEMATICS_hydrogen_strain_LABEL//' init -+>>>'
write(6,'(a15,a)') ' Current time: ',IO_timeStamp()
#include "compilation_info.f90"
maxNinstance = int(count(phase_kinematics == KINEMATICS_hydrogen_strain_ID),pInt)
if (maxNinstance == 0_pInt) return
if (iand(debug_level(debug_constitutive),debug_levelBasic) /= 0_pInt) &
write(6,'(a16,1x,i5,/)') '# instances:',maxNinstance
allocate(kinematics_hydrogen_strain_offset(material_Nphase), source=0_pInt)
allocate(kinematics_hydrogen_strain_instance(material_Nphase), source=0_pInt)
do phase = 1, material_Nphase
kinematics_hydrogen_strain_instance(phase) = count(phase_kinematics(:,1:phase) == kinematics_hydrogen_strain_ID)
do kinematics = 1, phase_Nkinematics(phase)
if (phase_kinematics(kinematics,phase) == kinematics_hydrogen_strain_ID) &
kinematics_hydrogen_strain_offset(phase) = kinematics
enddo
enddo
allocate(kinematics_hydrogen_strain_sizePostResults(maxNinstance), source=0_pInt)
allocate(kinematics_hydrogen_strain_sizePostResult(maxval(phase_Noutput),maxNinstance),source=0_pInt)
allocate(kinematics_hydrogen_strain_output(maxval(phase_Noutput),maxNinstance))
kinematics_hydrogen_strain_output = ''
allocate(kinematics_hydrogen_strain_Noutput(maxNinstance), source=0_pInt)
allocate(kinematics_hydrogen_strain_coeff(maxNinstance), source=0.0_pReal)
rewind(fileUnit)
phase = 0_pInt
do while (trim(line) /= IO_EOF .and. IO_lc(IO_getTag(line,'<','>')) /= MATERIAL_partPhase) ! wind forward to <phase>
line = IO_read(fileUnit)
enddo
parsingFile: do while (trim(line) /= IO_EOF) ! read through sections of phase 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 phase section
phase = phase + 1_pInt ! advance phase section counter
cycle ! skip to next line
endif
if (phase > 0_pInt ) then; if (any(phase_kinematics(:,phase) == KINEMATICS_hydrogen_strain_ID)) then ! do not short-circuit here (.and. with next if statemen). It's not safe in Fortran
instance = kinematics_hydrogen_strain_instance(phase) ! which instance of my damage is present phase
chunkPos = IO_stringPos(line)
tag = IO_lc(IO_stringValue(line,chunkPos,1_pInt)) ! extract key
select case(tag)
case ('hydrogen_strain_coeff')
kinematics_hydrogen_strain_coeff(instance) = IO_floatValue(line,chunkPos,2_pInt)
end select
endif; endif
enddo parsingFile
end subroutine kinematics_hydrogen_strain_init
!--------------------------------------------------------------------------------------------------
!> @brief report initial hydrogen strain based on current hydrogen conc deviation from
!> equillibrium (0)
!--------------------------------------------------------------------------------------------------
pure function kinematics_hydrogen_strain_initialStrain(ipc, ip, el)
use math, only: &
math_I3
use material, only: &
material_phase, &
material_homog, &
hydrogenConc, &
hydrogenfluxMapping
use lattice, only: &
lattice_equilibriumHydrogenConcentration
implicit none
integer(pInt), intent(in) :: &
ipc, & !< grain number
ip, & !< integration point number
el !< element number
real(pReal), dimension(3,3) :: &
kinematics_hydrogen_strain_initialStrain !< initial thermal strain (should be small strain, though)
integer(pInt) :: &
phase, &
homog, offset, instance
phase = material_phase(ipc,ip,el)
instance = kinematics_hydrogen_strain_instance(phase)
homog = material_homog(ip,el)
offset = hydrogenfluxMapping(homog)%p(ip,el)
kinematics_hydrogen_strain_initialStrain = &
(hydrogenConc(homog)%p(offset) - lattice_equilibriumHydrogenConcentration(phase)) * &
kinematics_hydrogen_strain_coeff(instance)* math_I3
end function kinematics_hydrogen_strain_initialStrain
!--------------------------------------------------------------------------------------------------
!> @brief contains the constitutive equation for calculating the velocity gradient
!--------------------------------------------------------------------------------------------------
subroutine kinematics_hydrogen_strain_LiAndItsTangent(Li, dLi_dTstar3333, ipc, ip, el)
use material, only: &
material_phase, &
material_homog, &
hydrogenConc, &
hydrogenConcRate, &
hydrogenfluxMapping
use math, only: &
math_I3
use lattice, only: &
lattice_equilibriumHydrogenConcentration
implicit none
integer(pInt), intent(in) :: &
ipc, & !< grain number
ip, & !< integration point number
el !< element number
real(pReal), intent(out), dimension(3,3) :: &
Li !< thermal velocity gradient
real(pReal), intent(out), dimension(3,3,3,3) :: &
dLi_dTstar3333 !< derivative of Li with respect to Tstar (4th-order tensor)
integer(pInt) :: &
phase, &
instance, &
homog, offset
real(pReal) :: &
Ch, ChEq, ChDot
phase = material_phase(ipc,ip,el)
instance = kinematics_hydrogen_strain_instance(phase)
homog = material_homog(ip,el)
offset = hydrogenfluxMapping(homog)%p(ip,el)
Ch = hydrogenConc(homog)%p(offset)
ChDot = hydrogenConcRate(homog)%p(offset)
ChEq = lattice_equilibriumHydrogenConcentration(phase)
Li = ChDot*math_I3* &
kinematics_hydrogen_strain_coeff(instance)/ &
(1.0_pReal + kinematics_hydrogen_strain_coeff(instance)*(Ch - ChEq))
dLi_dTstar3333 = 0.0_pReal
end subroutine kinematics_hydrogen_strain_LiAndItsTangent
!--------------------------------------------------------------------------------------------------
!> @brief contains the kinematic contribution to hydrogen chemical potential
!--------------------------------------------------------------------------------------------------
subroutine kinematics_hydrogen_strain_ChemPotAndItsTangent(ChemPot, dChemPot_dCh, Tstar_v, Fi0, Fi, ipc, ip, el)
use material, only: &
material_phase
use math, only: &
math_inv33, &
math_mul33x33, &
math_Mandel6to33, &
math_transpose33
implicit none
integer(pInt), intent(in) :: &
ipc, & !< grain number
ip, & !< integration point number
el !< element number
real(pReal), intent(in), dimension(6) :: &
Tstar_v
real(pReal), intent(in), dimension(3,3) :: &
Fi0, Fi
real(pReal), intent(out) :: &
ChemPot, dChemPot_dCh
integer(pInt) :: &
phase, &
instance
phase = material_phase(ipc,ip,el)
instance = kinematics_hydrogen_strain_instance(phase)
ChemPot = -kinematics_hydrogen_strain_coeff(instance)* &
sum(math_mul33x33(Fi,math_Mandel6to33(Tstar_v))* &
math_mul33x33(math_mul33x33(Fi,math_inv33(Fi0)),Fi))
dChemPot_dCh = 0.0_pReal
end subroutine kinematics_hydrogen_strain_ChemPotAndItsTangent
end module kinematics_hydrogen_strain
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