166 lines
6.0 KiB
Fortran
166 lines
6.0 KiB
Fortran
!--------------------------------------------------------------------------------------------------
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!> @author Pratheek Shanthraj, Max-Planck-Institut für Eisenforschung GmbH
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!> @brief material subroutine for locally evolving damage field
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!--------------------------------------------------------------------------------------------------
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module damage_local
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use prec
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use IO
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use material
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use config
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use numerics
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use YAML_types
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use constitutive
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use results
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implicit none
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private
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type :: tParameters
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character(len=pStringLen), allocatable, dimension(:) :: &
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output
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end type tParameters
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type, private :: tNumerics
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real(pReal) :: &
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residualStiffness !< non-zero residual damage
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end type tNumerics
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type(tparameters), dimension(:), allocatable :: &
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param
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type(tNumerics), private :: num
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public :: &
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damage_local_init, &
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damage_local_updateState, &
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damage_local_results
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contains
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!--------------------------------------------------------------------------------------------------
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!> @brief module initialization
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!> @details reads in material parameters, allocates arrays, and does sanity checks
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!--------------------------------------------------------------------------------------------------
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subroutine damage_local_init
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integer :: Ninstance,NofMyHomog,h
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class(tNode), pointer :: num_generic
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write(6,'(/,a)') ' <<<+- damage_'//DAMAGE_local_label//' init -+>>>'; flush(6)
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!----------------------------------------------------------------------------------------------
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! read numerics parameter and do sanity check
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num_generic => numerics_root%get('generic',defaultVal=emptyDict)
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num%residualStiffness = num_generic%get_asFloat('residualStiffness', defaultVal=1.0e-6_pReal)
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if (num%residualStiffness < 0.0_pReal) call IO_error(301,ext_msg='residualStiffness')
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Ninstance = count(damage_type == DAMAGE_local_ID)
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allocate(param(Ninstance))
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do h = 1, size(config_homogenization)
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if (damage_type(h) /= DAMAGE_LOCAL_ID) cycle
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associate(prm => param(damage_typeInstance(h)),config => config_homogenization(h))
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prm%output = config%getStrings('(output)',defaultVal=emptyStringArray)
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NofMyHomog = count(material_homogenizationAt == h)
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damageState(h)%sizeState = 1
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allocate(damageState(h)%state0 (1,NofMyHomog), source=damage_initialPhi(h))
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allocate(damageState(h)%subState0(1,NofMyHomog), source=damage_initialPhi(h))
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allocate(damageState(h)%state (1,NofMyHomog), source=damage_initialPhi(h))
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nullify(damageMapping(h)%p)
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damageMapping(h)%p => material_homogenizationMemberAt
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deallocate(damage(h)%p)
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damage(h)%p => damageState(h)%state(1,:)
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end associate
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enddo
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end subroutine damage_local_init
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!--------------------------------------------------------------------------------------------------
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!> @brief calculates local change in damage field
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!--------------------------------------------------------------------------------------------------
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function damage_local_updateState(subdt, ip, el)
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integer, intent(in) :: &
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ip, & !< integration point number
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el !< element number
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real(pReal), intent(in) :: &
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subdt
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logical, dimension(2) :: &
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damage_local_updateState
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integer :: &
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homog, &
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offset
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real(pReal) :: &
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phi, phiDot, dPhiDot_dPhi
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homog = material_homogenizationAt(el)
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offset = material_homogenizationMemberAt(ip,el)
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phi = damageState(homog)%subState0(1,offset)
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call damage_local_getSourceAndItsTangent(phiDot, dPhiDot_dPhi, phi, ip, el)
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phi = max(num%residualStiffness,min(1.0_pReal,phi + subdt*phiDot))
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damage_local_updateState = [ abs(phi - damageState(homog)%state(1,offset)) &
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<= 1.0e-2_pReal &
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.or. abs(phi - damageState(homog)%state(1,offset)) &
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<= 1.0e-6_pReal*abs(damageState(homog)%state(1,offset)), &
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.true.]
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damageState(homog)%state(1,offset) = phi
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end function damage_local_updateState
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!--------------------------------------------------------------------------------------------------
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!> @brief calculates homogenized local damage driving forces
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!--------------------------------------------------------------------------------------------------
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subroutine damage_local_getSourceAndItsTangent(phiDot, dPhiDot_dPhi, phi, ip, el)
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integer, intent(in) :: &
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ip, & !< integration point number
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el !< element number
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real(pReal), intent(in) :: &
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phi
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real(pReal) :: &
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phiDot, dPhiDot_dPhi
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phiDot = 0.0_pReal
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dPhiDot_dPhi = 0.0_pReal
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call constitutive_damage_getRateAndItsTangents(phiDot, dPhiDot_dPhi, phi, ip, el)
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phiDot = phiDot/real(homogenization_Ngrains(material_homogenizationAt(el)),pReal)
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dPhiDot_dPhi = dPhiDot_dPhi/real(homogenization_Ngrains(material_homogenizationAt(el)),pReal)
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end subroutine damage_local_getSourceAndItsTangent
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!--------------------------------------------------------------------------------------------------
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!> @brief writes results to HDF5 output file
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!--------------------------------------------------------------------------------------------------
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subroutine damage_local_results(homog,group)
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integer, intent(in) :: homog
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character(len=*), intent(in) :: group
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integer :: o
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associate(prm => param(damage_typeInstance(homog)))
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outputsLoop: do o = 1,size(prm%output)
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select case(prm%output(o))
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case ('damage')
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call results_writeDataset(group,damage(homog)%p,'phi',&
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'damage indicator','-')
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end select
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enddo outputsLoop
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end associate
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end subroutine damage_local_results
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end module damage_local
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