DAMASK_EICMD/src/source_damage_isoBrittle.f90

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!--------------------------------------------------------------------------------------------------
!> @author Pratheek Shanthraj, Max-Planck-Institut für Eisenforschung GmbH
!> @author Luv Sharma, Max-Planck-Institut für Eisenforschung GmbH
!> @brief material subroutine incoprorating isotropic brittle damage source mechanism
!> @details to be done
!--------------------------------------------------------------------------------------------------
module source_damage_isoBrittle
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use prec
use debug
use IO
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use math
use discretization
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use material
use config
use results
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implicit none
private
integer, dimension(:), allocatable :: &
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source_damage_isoBrittle_offset, &
source_damage_isoBrittle_instance
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enum, bind(c)
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enumerator :: &
undefined_ID, &
damage_drivingforce_ID
end enum
type, private :: tParameters !< container type for internal constitutive parameters
real(pReal) :: &
critStrainEnergy, &
N, &
aTol
integer(kind(undefined_ID)), allocatable, dimension(:) :: &
outputID
end type tParameters
type(tParameters), dimension(:), allocatable :: param !< containers of constitutive parameters (len Ninstance)
public :: &
source_damage_isoBrittle_init, &
source_damage_isoBrittle_deltaState, &
source_damage_isoBrittle_getRateAndItsTangent, &
source_damage_isoBrittle_Results
contains
!--------------------------------------------------------------------------------------------------
!> @brief module initialization
!> @details reads in material parameters, allocates arrays, and does sanity checks
!--------------------------------------------------------------------------------------------------
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subroutine source_damage_isoBrittle_init
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integer :: Ninstance,instance,source,sourceOffset,NofMyPhase,p,i
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integer(kind(undefined_ID)) :: &
outputID
character(len=pStringLen) :: &
extmsg = ''
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character(len=pStringLen), dimension(:), allocatable :: &
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outputs
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write(6,'(/,a)') ' <<<+- source_'//SOURCE_DAMAGE_ISOBRITTLE_LABEL//' init -+>>>'; flush(6)
Ninstance = count(phase_source == SOURCE_DAMAGE_ISOBRITTLE_ID)
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if (iand(debug_level(debug_constitutive),debug_levelBasic) /= 0) &
write(6,'(a16,1x,i5,/)') '# instances:',Ninstance
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allocate(source_damage_isoBrittle_offset (size(config_phase)), source=0)
allocate(source_damage_isoBrittle_instance(size(config_phase)), source=0)
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allocate(param(Ninstance))
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do p = 1, size(config_phase)
source_damage_isoBrittle_instance(p) = count(phase_source(:,1:p) == SOURCE_DAMAGE_ISOBRITTLE_ID)
do source = 1, phase_Nsources(p)
if (phase_source(source,p) == SOURCE_DAMAGE_ISOBRITTLE_ID) &
source_damage_isoBrittle_offset(p) = source
enddo
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if (all(phase_source(:,p) /= SOURCE_DAMAGE_ISOBRITTLE_ID)) cycle
associate(prm => param(source_damage_isoBrittle_instance(p)), &
config => config_phase(p))
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prm%aTol = config%getFloat('isobrittle_atol',defaultVal = 1.0e-3_pReal)
prm%N = config%getFloat('isobrittle_n')
prm%critStrainEnergy = config%getFloat('isobrittle_criticalstrainenergy')
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! sanity checks
if (prm%aTol < 0.0_pReal) extmsg = trim(extmsg)//' isobrittle_atol'
if (prm%N <= 0.0_pReal) extmsg = trim(extmsg)//' isobrittle_n'
if (prm%critStrainEnergy <= 0.0_pReal) extmsg = trim(extmsg)//' isobrittle_criticalstrainenergy'
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!--------------------------------------------------------------------------------------------------
! exit if any parameter is out of range
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if (extmsg /= '') &
call IO_error(211,ext_msg=trim(extmsg)//'('//SOURCE_DAMAGE_ISOBRITTLE_LABEL//')')
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!--------------------------------------------------------------------------------------------------
! output pararameters
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outputs = config%getStrings('(output)',defaultVal=emptyStringArray)
allocate(prm%outputID(0))
do i=1, size(outputs)
outputID = undefined_ID
select case(outputs(i))
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case ('isobrittle_drivingforce')
prm%outputID = [prm%outputID, damage_drivingforce_ID]
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end select
enddo
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NofMyPhase = count(material_phaseAt==p) * discretization_nIP
instance = source_damage_isoBrittle_instance(p)
sourceOffset = source_damage_isoBrittle_offset(p)
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call material_allocateSourceState(p,sourceOffset,NofMyPhase,1,1,1)
sourceState(p)%p(sourceOffset)%aTolState=param(instance)%aTol
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end associate
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enddo
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end subroutine source_damage_isoBrittle_init
!--------------------------------------------------------------------------------------------------
!> @brief calculates derived quantities from state
!--------------------------------------------------------------------------------------------------
subroutine source_damage_isoBrittle_deltaState(C, Fe, ipc, ip, el)
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integer, intent(in) :: &
ipc, & !< component-ID of integration point
ip, & !< integration point
el !< element
real(pReal), intent(in), dimension(3,3) :: &
Fe
real(pReal), intent(in), dimension(6,6) :: &
C
integer :: &
phase, constituent, instance, sourceOffset
real(pReal) :: &
strain(6), &
strainenergy
phase = material_phaseAt(ipc,el) !< phase ID at ipc,ip,el
constituent = material_phasememberAt(ipc,ip,el) !< state array offset for phase ID at ipc,ip,el
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! ToDo: capability for multiple instances of SAME source within given phase. Needs Ninstance loop from here on!
instance = source_damage_isoBrittle_instance(phase) !< instance of damage_isoBrittle source
sourceOffset = source_damage_isoBrittle_offset(phase)
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strain = 0.5_pReal*math_sym33to6(matmul(transpose(Fe),Fe)-math_I3)
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strainenergy = 2.0_pReal*sum(strain*matmul(C,strain))/param(instance)%critStrainEnergy
! ToDo: check strainenergy = 2.0_pReal*dot_product(strain,matmul(C,strain))/param(instance)%critStrainEnergy
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if (strainenergy > sourceState(phase)%p(sourceOffset)%subState0(1,constituent)) then
sourceState(phase)%p(sourceOffset)%deltaState(1,constituent) = &
strainenergy - sourceState(phase)%p(sourceOffset)%state(1,constituent)
else
sourceState(phase)%p(sourceOffset)%deltaState(1,constituent) = &
sourceState(phase)%p(sourceOffset)%subState0(1,constituent) - &
sourceState(phase)%p(sourceOffset)%state(1,constituent)
endif
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end subroutine source_damage_isoBrittle_deltaState
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!--------------------------------------------------------------------------------------------------
!> @brief returns local part of nonlocal damage driving force
!--------------------------------------------------------------------------------------------------
subroutine source_damage_isoBrittle_getRateAndItsTangent(localphiDot, dLocalphiDot_dPhi, phi, phase, constituent)
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integer, intent(in) :: &
phase, &
constituent
real(pReal), intent(in) :: &
phi
real(pReal), intent(out) :: &
localphiDot, &
dLocalphiDot_dPhi
integer :: &
instance, sourceOffset
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instance = source_damage_isoBrittle_instance(phase)
sourceOffset = source_damage_isoBrittle_offset(phase)
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localphiDot = (1.0_pReal - phi)**(param(instance)%N - 1.0_pReal) - &
phi*sourceState(phase)%p(sourceOffset)%state(1,constituent)
dLocalphiDot_dPhi = - (param(instance)%N - 1.0_pReal)* &
(1.0_pReal - phi)**max(0.0_pReal,param(instance)%N - 2.0_pReal) &
- sourceState(phase)%p(sourceOffset)%state(1,constituent)
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end subroutine source_damage_isoBrittle_getRateAndItsTangent
!--------------------------------------------------------------------------------------------------
!> @brief writes results to HDF5 output file
!--------------------------------------------------------------------------------------------------
subroutine source_damage_isoBrittle_results(phase,group)
integer, intent(in) :: phase
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character(len=*), intent(in) :: group
integer :: sourceOffset, o, instance
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instance = source_damage_isoBrittle_instance(phase)
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sourceOffset = source_damage_isoBrittle_offset(phase)
associate(prm => param(instance), stt => sourceState(phase)%p(sourceOffset)%state)
outputsLoop: do o = 1,size(prm%outputID)
select case(prm%outputID(o))
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case (damage_drivingforce_ID)
call results_writeDataset(group,stt,'tbd','driving force','tbd')
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end select
enddo outputsLoop
end associate
end subroutine source_damage_isoBrittle_results
end module source_damage_isoBrittle