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!************************************
!* Module: CONSTITUTIVE_NONLOCAL *
!************************************
!* contains: *
!* - constitutive equations *
!* - parameters definition *
!************************************
MODULE constitutive_nonlocal
!* Include other modules
use prec , only : pReal , pInt
implicit none
!* Definition of parameters
character ( len = * ) , parameter :: constitutive_nonlocal_label = 'nonlocal'
character ( len = 16 ) , dimension ( 7 ) , parameter :: constitutive_nonlocal_stateList = ( / 'rhoEdgePos ' , &
'rhoEdgeNeg ' , &
'rhoScrewPos ' , &
'rhoScrewNeg ' , &
'rhoForest ' , &
'tauSlipThreshold' , &
'backStress_v ' / ) ! list of microstructural state variables
character ( len = 16 ) , dimension ( 4 ) , parameter :: constitutive_nonlocal_stateListBasic = constitutive_nonlocal_stateList ( 1 : 4 ) ! list of "basic" microstructural state variables that are independent from other state variables
character ( len = 16 ) , dimension ( 3 ) , parameter :: constitutive_nonlocal_stateListDependent = constitutive_nonlocal_stateList ( 5 : 7 ) ! list of microstructural state variables that depend on other state variables
real ( pReal ) , parameter :: kB = 1.38e-23_pReal ! Physical parameter, Boltzmann constant in J/Kelvin
!* Definition of global variables
integer ( pInt ) , dimension ( : ) , allocatable :: constitutive_nonlocal_sizeDotState , & ! number of dotStates
constitutive_nonlocal_sizeState , & ! total number of microstructural state variables
constitutive_nonlocal_sizePostResults ! cumulative size of post results
integer ( pInt ) , dimension ( : , : ) , allocatable , target :: constitutive_nonlocal_sizePostResult ! size of each post result output
character ( len = 64 ) , dimension ( : , : ) , allocatable , target :: constitutive_nonlocal_output ! name of each post result output
character ( len = 32 ) , dimension ( : ) , allocatable :: constitutive_nonlocal_structureName ! name of the lattice structure
integer ( pInt ) , dimension ( : ) , allocatable :: constitutive_nonlocal_structure , & ! number representing the kind of lattice structure
constitutive_nonlocal_totalNslip ! total number of active slip systems for each instance
integer ( pInt ) , dimension ( : , : ) , allocatable :: constitutive_nonlocal_Nslip , & ! number of active slip systems for each family and instance
constitutive_nonlocal_slipFamily , & ! lookup table relating active slip system to slip family for each instance
constitutive_nonlocal_slipSystemLattice ! lookup table relating active slip system index to lattice slip system index for each instance
real ( pReal ) , dimension ( : ) , allocatable :: constitutive_nonlocal_CoverA , & ! c/a ratio for hex type lattice
constitutive_nonlocal_C11 , & ! C11 element in elasticity matrix
constitutive_nonlocal_C12 , & ! C12 element in elasticity matrix
constitutive_nonlocal_C13 , & ! C13 element in elasticity matrix
constitutive_nonlocal_C33 , & ! C33 element in elasticity matrix
constitutive_nonlocal_C44 , & ! C44 element in elasticity matrix
constitutive_nonlocal_Gmod , & ! shear modulus
constitutive_nonlocal_nu ! poisson's ratio
real ( pReal ) , dimension ( : , : , : ) , allocatable :: constitutive_nonlocal_Cslip_66 ! elasticity matrix in Mandel notation for each instance
real ( pReal ) , dimension ( : , : , : , : , : ) , allocatable :: constitutive_nonlocal_Cslip_3333 ! elasticity matrix for each instance
real ( pReal ) , dimension ( : , : ) , allocatable :: constitutive_nonlocal_rhoEdgePos0 , & ! initial edge_pos dislocation density per slip system for each family and instance
constitutive_nonlocal_rhoEdgeNeg0 , & ! initial edge_neg dislocation density per slip system for each family and instance
constitutive_nonlocal_rhoScrewPos0 , & ! initial screw_pos dislocation density per slip system for each family and instance
constitutive_nonlocal_rhoScrewNeg0 , & ! initial screw_neg dislocation density per slip system for each family and instance
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constitutive_nonlocal_v0BySlipFamily , & ! dislocation velocity prefactor [m/s] for each family and instance
constitutive_nonlocal_v0BySlipSystem , & ! dislocation velocity prefactor [m/s] for each slip system and instance
constitutive_nonlocal_lambda0BySlipFamily , & ! mean free path prefactor for each family and instance
constitutive_nonlocal_lambda0BySlipSystem , & ! mean free path prefactor for each slip system and instance
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constitutive_nonlocal_burgersBySlipFamily , & ! absolute length of burgers vector [m] for each family and instance
constitutive_nonlocal_burgersBySlipSystem , & ! absolute length of burgers vector [m] for each slip system and instance
constitutive_nonlocal_interactionSlipSlip ! coefficients for slip-slip interaction for each interaction type and instance
real ( pReal ) , dimension ( : , : , : ) , allocatable :: constitutive_nonlocal_forestProjectionEdge , & ! matrix of forest projections of edge dislocations for each instance
constitutive_nonlocal_forestProjectionScrew , & ! matrix of forest projections of screw dislocations for each instance
constitutive_nonlocal_interactionMatrixSlipSlip ! interaction matrix of the different slip systems for each instance
CONTAINS
!****************************************
!* - constitutive_init
!* - constitutive_stateInit
!* - constitutive_homogenizedC
!* - constitutive_microstructure
!* - constitutive_LpAndItsTangent
!* - constitutive_dotState
!* - constitutive_dotTemperature
!* - constitutive_postResults
!****************************************
!**************************************
!* Module initialization *
!**************************************
subroutine constitutive_nonlocal_init ( file )
use prec , only : pInt , pReal
use math , only : math_Mandel3333to66 , &
math_Voigt66to3333 , &
math_mul3x3
use IO , only : IO_lc , &
IO_getTag , &
IO_isBlank , &
IO_stringPos , &
IO_stringValue , &
IO_floatValue , &
IO_intValue , &
IO_error
use material , only : phase_constitution , &
phase_constitutionInstance , &
phase_Noutput
use lattice , only : lattice_maxNslipFamily , &
lattice_maxNtwinFamily , &
lattice_maxNslip , &
lattice_maxNtwin , &
lattice_maxNinteraction , &
lattice_NslipSystem , &
lattice_NtwinSystem , &
lattice_initializeStructure , &
lattice_Qtwin , &
lattice_sd , &
lattice_sn , &
lattice_st , &
lattice_interactionSlipSlip
!*** output variables
!*** input variables
integer ( pInt ) , intent ( in ) :: file
!*** local variables
integer ( pInt ) , parameter :: maxNchunks = 21
integer ( pInt ) , dimension ( 1 + 2 * maxNchunks ) :: positions
integer ( pInt ) section , &
maxNinstance , &
maxTotalNslip , &
myStructure , &
f , & ! index of my slip family
i , & ! index of my instance of this constitution
j , &
k , &
l , &
o , & ! index of my output
s , & ! index of my slip system
s1 , & ! index of my slip system
s2 , & ! index of my slip system
output , &
mySize
character ( len = 64 ) tag
character ( len = 1024 ) line
write ( 6 , * )
write ( 6 , '(a20,a20,a12)' ) '<<<+- constitutive_' , constitutive_nonlocal_label , ' init -+>>>'
write ( 6 , * )
maxNinstance = count ( phase_constitution == constitutive_nonlocal_label )
if ( maxNinstance == 0 ) return ! we don't have to do anything if there's no instance for this constitutive law
!*** space allocation for global variables
allocate ( constitutive_nonlocal_sizeDotState ( maxNinstance ) ) ; constitutive_nonlocal_sizeDotState = 0_pInt
allocate ( constitutive_nonlocal_sizeState ( maxNinstance ) ) ; constitutive_nonlocal_sizeState = 0_pInt
allocate ( constitutive_nonlocal_sizePostResults ( maxNinstance ) ) ; constitutive_nonlocal_sizePostResults = 0_pInt
allocate ( constitutive_nonlocal_sizePostResult ( maxval ( phase_Noutput ) , maxNinstance ) ) ; constitutive_nonlocal_sizePostResult = 0_pInt
allocate ( constitutive_nonlocal_output ( maxval ( phase_Noutput ) , maxNinstance ) ) ; constitutive_nonlocal_output = ''
allocate ( constitutive_nonlocal_structureName ( maxNinstance ) ) ; constitutive_nonlocal_structureName = ''
allocate ( constitutive_nonlocal_structure ( maxNinstance ) ) ; constitutive_nonlocal_structure = 0_pInt
allocate ( constitutive_nonlocal_Nslip ( lattice_maxNslipFamily , maxNinstance ) ) ; constitutive_nonlocal_Nslip = 0_pInt
allocate ( constitutive_nonlocal_slipFamily ( lattice_maxNslip , maxNinstance ) ) ; constitutive_nonlocal_slipFamily = 0_pInt
allocate ( constitutive_nonlocal_slipSystemLattice ( lattice_maxNslip , maxNinstance ) ) ; constitutive_nonlocal_slipSystemLattice = 0_pInt
allocate ( constitutive_nonlocal_totalNslip ( maxNinstance ) ) ; constitutive_nonlocal_totalNslip = 0_pInt
allocate ( constitutive_nonlocal_CoverA ( maxNinstance ) ) ; constitutive_nonlocal_CoverA = 0.0_pReal
allocate ( constitutive_nonlocal_C11 ( maxNinstance ) ) ; constitutive_nonlocal_C11 = 0.0_pReal
allocate ( constitutive_nonlocal_C12 ( maxNinstance ) ) ; constitutive_nonlocal_C12 = 0.0_pReal
allocate ( constitutive_nonlocal_C13 ( maxNinstance ) ) ; constitutive_nonlocal_C13 = 0.0_pReal
allocate ( constitutive_nonlocal_C33 ( maxNinstance ) ) ; constitutive_nonlocal_C33 = 0.0_pReal
allocate ( constitutive_nonlocal_C44 ( maxNinstance ) ) ; constitutive_nonlocal_C44 = 0.0_pReal
allocate ( constitutive_nonlocal_Gmod ( maxNinstance ) ) ; constitutive_nonlocal_Gmod = 0.0_pReal
allocate ( constitutive_nonlocal_nu ( maxNinstance ) ) ; constitutive_nonlocal_nu = 0.0_pReal
allocate ( constitutive_nonlocal_Cslip_66 ( 6 , 6 , maxNinstance ) ) ; constitutive_nonlocal_Cslip_66 = 0.0_pReal
allocate ( constitutive_nonlocal_Cslip_3333 ( 3 , 3 , 3 , 3 , maxNinstance ) ) ; constitutive_nonlocal_Cslip_3333 = 0.0_pReal
allocate ( constitutive_nonlocal_rhoEdgePos0 ( lattice_maxNslipFamily , maxNinstance ) ) ; constitutive_nonlocal_rhoEdgePos0 = 0.0_pReal
allocate ( constitutive_nonlocal_rhoEdgeNeg0 ( lattice_maxNslipFamily , maxNinstance ) ) ; constitutive_nonlocal_rhoEdgeNeg0 = 0.0_pReal
allocate ( constitutive_nonlocal_rhoScrewPos0 ( lattice_maxNslipFamily , maxNinstance ) ) ; constitutive_nonlocal_rhoScrewPos0 = 0.0_pReal
allocate ( constitutive_nonlocal_rhoScrewNeg0 ( lattice_maxNslipFamily , maxNinstance ) ) ; constitutive_nonlocal_rhoScrewNeg0 = 0.0_pReal
allocate ( constitutive_nonlocal_v0BySlipFamily ( lattice_maxNslipFamily , maxNinstance ) ) ;
constitutive_nonlocal_v0BySlipFamily = 0.0_pReal
allocate ( constitutive_nonlocal_burgersBySlipFamily ( lattice_maxNslipFamily , maxNinstance ) ) ;
constitutive_nonlocal_burgersBySlipFamily = 0.0_pReal
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allocate ( constitutive_nonlocal_Lambda0BySlipFamily ( lattice_maxNslipFamily , maxNinstance ) ) ;
constitutive_nonlocal_lambda0BySlipFamily = 0.0_pReal
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allocate ( constitutive_nonlocal_interactionSlipSlip ( lattice_maxNinteraction , maxNinstance ) )
constitutive_nonlocal_interactionSlipSlip = 0.0_pReal
!*** readout data from material.config file
rewind ( file )
line = ''
section = 0
do while ( IO_lc ( IO_getTag ( line , '<' , '>' ) ) / = 'phase' ) ! wind forward to <phase>
read ( file , '(a1024)' , END = 100 ) line
enddo
do ! read thru sections of phase part
read ( file , '(a1024)' , END = 100 ) line
if ( IO_isBlank ( line ) ) cycle ! skip empty lines
if ( IO_getTag ( line , '<' , '>' ) / = '' ) exit ! stop at next part
if ( IO_getTag ( line , '[' , ']' ) / = '' ) then ! next section
section = section + 1
output = 0 ! reset output counter
endif
if ( section > 0 . and . phase_constitution ( section ) == constitutive_nonlocal_label ) then ! one of my sections
i = phase_constitutionInstance ( section ) ! which instance of my constitution is present phase
positions = IO_stringPos ( line , maxNchunks )
tag = IO_lc ( IO_stringValue ( line , positions , 1 ) ) ! extract key
select case ( tag )
case ( '(output)' )
output = output + 1
constitutive_nonlocal_output ( output , i ) = IO_lc ( IO_stringValue ( line , positions , 2 ) )
case ( 'lattice_structure' )
constitutive_nonlocal_structureName ( i ) = IO_lc ( IO_stringValue ( line , positions , 2 ) )
case ( 'covera_ratio' )
constitutive_nonlocal_CoverA ( i ) = IO_floatValue ( line , positions , 2 )
case ( 'c11' )
constitutive_nonlocal_C11 ( i ) = IO_floatValue ( line , positions , 2 )
case ( 'c12' )
constitutive_nonlocal_C12 ( i ) = IO_floatValue ( line , positions , 2 )
case ( 'c13' )
constitutive_nonlocal_C13 ( i ) = IO_floatValue ( line , positions , 2 )
case ( 'c33' )
constitutive_nonlocal_C33 ( i ) = IO_floatValue ( line , positions , 2 )
case ( 'c44' )
constitutive_nonlocal_C44 ( i ) = IO_floatValue ( line , positions , 2 )
case ( 'nslip' )
forall ( f = 1 : lattice_maxNslipFamily ) constitutive_nonlocal_Nslip ( f , i ) = IO_intValue ( line , positions , 1 + f )
case ( 'rhoedgepos0' )
forall ( f = 1 : lattice_maxNslipFamily ) constitutive_nonlocal_rhoEdgePos0 ( f , i ) = IO_floatValue ( line , positions , 1 + f )
case ( 'rhoedgeneg0' )
forall ( f = 1 : lattice_maxNslipFamily ) constitutive_nonlocal_rhoEdgeNeg0 ( f , i ) = IO_floatValue ( line , positions , 1 + f )
case ( 'rhoscrewpos0' )
forall ( f = 1 : lattice_maxNslipFamily ) constitutive_nonlocal_rhoScrewPos0 ( f , i ) = IO_floatValue ( line , positions , 1 + f )
case ( 'rhoscrewneg0' )
forall ( f = 1 : lattice_maxNslipFamily ) constitutive_nonlocal_rhoScrewNeg0 ( f , i ) = IO_floatValue ( line , positions , 1 + f )
case ( 'v0' )
forall ( f = 1 : lattice_maxNslipFamily ) constitutive_nonlocal_v0BySlipFamily ( f , i ) = IO_floatValue ( line , positions , 1 + f )
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case ( 'lambda0' )
forall ( f = 1 : lattice_maxNslipFamily ) constitutive_nonlocal_lambda0BySlipFamily ( f , i ) = IO_floatValue ( line , positions , 1 + f )
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case ( 'burgers' )
forall ( f = 1 : lattice_maxNslipFamily ) constitutive_nonlocal_burgersBySlipFamily ( f , i ) = IO_floatValue ( line , positions , 1 + f )
case ( 'interaction_slipslip' )
forall ( f = 1 : lattice_maxNinteraction ) constitutive_nonlocal_interactionSlipSlip ( f , i ) = IO_floatValue ( line , positions , 1 + f )
end select
endif
enddo
100 do i = 1 , maxNinstance
constitutive_nonlocal_structure ( i ) = &
lattice_initializeStructure ( constitutive_nonlocal_structureName ( i ) , constitutive_nonlocal_CoverA ( i ) ) ! our lattice structure is defined in the material.config file by the structureName (and the c/a ratio)
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!*** sanity checks
!*** !!! not yet complete !!!
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if ( constitutive_nonlocal_structure ( i ) < 1 . or . constitutive_nonlocal_structure ( i ) > 3 ) call IO_error ( 205 )
if ( sum ( constitutive_nonlocal_Nslip ( : , i ) ) < = 0 ) call IO_error ( 225 )
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do f = 1 , lattice_maxNslipFamily
if ( constitutive_nonlocal_Nslip ( f , i ) > 0 ) then
if ( constitutive_nonlocal_rhoEdgePos0 ( f , i ) < 0.0_pReal ) call IO_error ( 220 )
if ( constitutive_nonlocal_rhoEdgeNeg0 ( f , i ) < 0.0_pReal ) call IO_error ( 220 )
if ( constitutive_nonlocal_rhoScrewPos0 ( f , i ) < 0.0_pReal ) call IO_error ( 220 )
if ( constitutive_nonlocal_rhoScrewNeg0 ( f , i ) < 0.0_pReal ) call IO_error ( 220 )
if ( constitutive_nonlocal_burgersBySlipFamily ( f , i ) < = 0.0_pReal ) call IO_error ( 221 )
if ( constitutive_nonlocal_v0BySlipFamily ( f , i ) < = 0.0_pReal ) call IO_error ( - 1 )
if ( constitutive_nonlocal_lambda0BySlipFamily ( f , i ) < = 0.0_pReal ) call IO_error ( - 1 )
endif
enddo
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!*** determine total number of active slip systems
constitutive_nonlocal_Nslip ( : , i ) &
= min ( lattice_NslipSystem ( : , constitutive_nonlocal_structure ( i ) ) , constitutive_nonlocal_Nslip ( : , i ) ) ! we can't use more slip systems per family than specified in lattice
constitutive_nonlocal_totalNslip ( i ) = sum ( constitutive_nonlocal_Nslip ( : , i ) )
enddo
!*** allocation of variables whose size depends on the total number of active slip systems
maxTotalNslip = maxval ( constitutive_nonlocal_totalNslip )
allocate ( constitutive_nonlocal_burgersBySlipSystem ( maxTotalNslip , maxNinstance ) )
constitutive_nonlocal_burgersBySlipSystem = 0.0_pReal
allocate ( constitutive_nonlocal_v0BySlipSystem ( maxTotalNslip , maxNinstance ) )
constitutive_nonlocal_v0BySlipSystem = 0.0_pReal
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allocate ( constitutive_nonlocal_lambda0BySlipSystem ( maxTotalNslip , maxNinstance ) )
constitutive_nonlocal_lambda0BySlipSystem = 0.0_pReal
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allocate ( constitutive_nonlocal_forestProjectionEdge ( maxTotalNslip , maxTotalNslip , maxNinstance ) )
constitutive_nonlocal_forestProjectionEdge = 0.0_pReal
allocate ( constitutive_nonlocal_forestProjectionScrew ( maxTotalNslip , maxTotalNslip , maxNinstance ) )
constitutive_nonlocal_forestProjectionScrew = 0.0_pReal
allocate ( constitutive_nonlocal_interactionMatrixSlipSlip ( maxTotalNslip , maxTotalNslip , maxNinstance ) )
constitutive_nonlocal_interactionMatrixSlipSlip = 0.0_pReal
do i = 1 , maxNinstance
myStructure = constitutive_nonlocal_structure ( i ) ! lattice structure of this instance
!*** Inverse lookup of my slip system family and the slip system in lattice
l = 0_pInt
do f = 1 , lattice_maxNslipFamily
do s = 1 , constitutive_nonlocal_Nslip ( f , i )
l = l + 1
constitutive_nonlocal_slipFamily ( l , i ) = f
constitutive_nonlocal_slipSystemLattice ( l , i ) = sum ( lattice_NslipSystem ( 1 : f - 1 , myStructure ) ) + s
enddo ; enddo
!*** determine size of state array
constitutive_nonlocal_sizeState ( i ) = ( size ( constitutive_nonlocal_stateList ) - 1 ) * constitutive_nonlocal_totalNslip ( i ) + 6_pInt ! the size of the list of states times the number of active slip systems gives the required size for the state array
constitutive_nonlocal_sizeDotState ( i ) = size ( constitutive_nonlocal_stateListBasic ) * constitutive_nonlocal_totalNslip ( i ) ! the size of the list of basic states times the number of active slip systems gives the required size for the dotState array
!*** determine size of postResults array
do o = 1 , maxval ( phase_Noutput )
select case ( constitutive_nonlocal_output ( o , i ) )
case ( 'dislocationdensity' , &
'shearrate_slip' , &
'resolvedstress_slip' , &
'resistance_slip' )
mySize = constitutive_nonlocal_totalNslip ( i )
case default
mySize = 0_pInt
end select
if ( mySize > 0_pInt ) then ! any meaningful output found
constitutive_nonlocal_sizePostResult ( o , i ) = mySize
constitutive_nonlocal_sizePostResults ( i ) = constitutive_nonlocal_sizePostResults ( i ) + mySize
endif
enddo
!*** elasticity matrix and shear modulus according to material.config
select case ( myStructure )
case ( 1 : 2 ) ! cubic(s)
forall ( k = 1 : 3 )
forall ( j = 1 : 3 ) constitutive_nonlocal_Cslip_66 ( k , j , i ) = constitutive_nonlocal_C12 ( i )
constitutive_nonlocal_Cslip_66 ( k , k , i ) = constitutive_nonlocal_C11 ( i )
constitutive_nonlocal_Cslip_66 ( k + 3 , k + 3 , i ) = constitutive_nonlocal_C44 ( i )
end forall
case ( 3 : ) ! all hex
constitutive_nonlocal_Cslip_66 ( 1 , 1 , i ) = constitutive_nonlocal_C11 ( i )
constitutive_nonlocal_Cslip_66 ( 2 , 2 , i ) = constitutive_nonlocal_C11 ( i )
constitutive_nonlocal_Cslip_66 ( 3 , 3 , i ) = constitutive_nonlocal_C33 ( i )
constitutive_nonlocal_Cslip_66 ( 1 , 2 , i ) = constitutive_nonlocal_C12 ( i )
constitutive_nonlocal_Cslip_66 ( 2 , 1 , i ) = constitutive_nonlocal_C12 ( i )
constitutive_nonlocal_Cslip_66 ( 1 , 3 , i ) = constitutive_nonlocal_C13 ( i )
constitutive_nonlocal_Cslip_66 ( 3 , 1 , i ) = constitutive_nonlocal_C13 ( i )
constitutive_nonlocal_Cslip_66 ( 2 , 3 , i ) = constitutive_nonlocal_C13 ( i )
constitutive_nonlocal_Cslip_66 ( 3 , 2 , i ) = constitutive_nonlocal_C13 ( i )
constitutive_nonlocal_Cslip_66 ( 4 , 4 , i ) = constitutive_nonlocal_C44 ( i )
constitutive_nonlocal_Cslip_66 ( 5 , 5 , i ) = constitutive_nonlocal_C44 ( i )
constitutive_nonlocal_Cslip_66 ( 6 , 6 , i ) = 0.5_pReal * ( constitutive_nonlocal_C11 ( i ) - constitutive_nonlocal_C12 ( i ) )
end select
constitutive_nonlocal_Cslip_66 ( : , : , i ) = math_Mandel3333to66 ( math_Voigt66to3333 ( constitutive_nonlocal_Cslip_66 ( : , : , i ) ) )
constitutive_nonlocal_Cslip_3333 ( : , : , : , : , i ) = math_Voigt66to3333 ( constitutive_nonlocal_Cslip_66 ( : , : , i ) )
constitutive_nonlocal_Gmod ( i ) = constitutive_nonlocal_C44 ( i ) ! shear modulus is given by elastic constant C44
constitutive_nonlocal_nu ( i ) = constitutive_nonlocal_C12 ( i ) / constitutive_nonlocal_C11 ( i )
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!*** burgers vector, dislocation velocity prefactor and mean free path prefactor for each slip system
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do s = 1 , constitutive_nonlocal_totalNslip ( i )
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constitutive_nonlocal_burgersBySlipSystem ( s , i ) &
= constitutive_nonlocal_burgersBySlipFamily ( constitutive_nonlocal_slipFamily ( s , i ) , i )
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constitutive_nonlocal_v0BySlipSystem ( s , i ) = constitutive_nonlocal_v0BySlipFamily ( constitutive_nonlocal_slipFamily ( s , i ) , i )
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constitutive_nonlocal_lambda0BySlipSystem ( s , i ) &
= constitutive_nonlocal_lambda0BySlipFamily ( constitutive_nonlocal_slipFamily ( s , i ) , i )
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enddo
!*** calculation of forest projections for edge and screw dislocations
do s1 = 1 , constitutive_nonlocal_totalNslip ( i )
do s2 = 1 , constitutive_nonlocal_totalNslip ( i )
constitutive_nonlocal_forestProjectionEdge ( s1 , s2 , i ) &
= abs ( math_mul3x3 ( lattice_sn ( : , constitutive_nonlocal_slipSystemLattice ( s1 , i ) , myStructure ) , &
lattice_st ( : , constitutive_nonlocal_slipSystemLattice ( s2 , i ) , myStructure ) ) ) ! forest projection of edge dislocations is the projection of (b x n) onto the slip normal of the respective splip plane
constitutive_nonlocal_forestProjectionScrew ( s1 , s2 , i ) &
= abs ( math_mul3x3 ( lattice_sn ( : , constitutive_nonlocal_slipSystemLattice ( s1 , i ) , myStructure ) , &
lattice_sd ( : , constitutive_nonlocal_slipSystemLattice ( s2 , i ) , myStructure ) ) ) ! forest projection of screw dislocations is the projection of b onto the slip normal of the respective splip plane
enddo ; enddo
!*** calculation of interaction matrices
do s1 = 1 , constitutive_nonlocal_totalNslip ( i )
do s2 = 1 , constitutive_nonlocal_totalNslip ( i )
constitutive_nonlocal_interactionMatrixSlipSlip ( s1 , s2 , i ) &
= constitutive_nonlocal_interactionSlipSlip ( lattice_interactionSlipSlip ( constitutive_nonlocal_slipSystemLattice ( s1 , i ) , &
constitutive_nonlocal_slipSystemLattice ( s2 , i ) , &
myStructure ) , &
i )
enddo ; enddo
enddo
endsubroutine
!*********************************************************************
!* initial microstructural state (just the "basic" states) *
!*********************************************************************
pure function constitutive_nonlocal_stateInit ( myInstance )
use prec , only : pReal , &
pInt
use lattice , only : lattice_maxNslipFamily
use IO , only : IO_error
implicit none
!*** input variables
integer ( pInt ) , intent ( in ) :: myInstance ! number specifying the current instance of the constitution
!*** output variables
real ( pReal ) , dimension ( constitutive_nonlocal_sizeState ( myInstance ) ) :: &
constitutive_nonlocal_stateInit
!*** local variables
real ( pReal ) , dimension ( constitutive_nonlocal_totalNslip ( myInstance ) ) :: &
rhoEdgePos , & ! positive edge dislocation density
rhoEdgeNeg , & ! negative edge dislocation density
rhoScrewPos , & ! positive screw dislocation density
rhoScrewNeg , & ! negative screw dislocation density
rhoForest , & ! forest dislocation density
tauSlipThreshold ! threshold shear stress for slip
integer ( pInt ) ns , & ! short notation for total number of active slip systems
f , & ! index of lattice family
s0 , &
s1 , &
s ! index of slip system
constitutive_nonlocal_stateInit = 0.0_pReal
ns = constitutive_nonlocal_totalNslip ( myInstance )
!*** set the basic state variables
s1 = 0_pInt
do f = 1 , lattice_maxNslipFamily
s0 = s1 + 1_pInt
s1 = s0 + constitutive_nonlocal_Nslip ( f , myInstance ) - 1_pInt
do s = s0 , s1
rhoEdgePos ( s ) = constitutive_nonlocal_rhoEdgePos0 ( f , myInstance )
rhoEdgeNeg ( s ) = constitutive_nonlocal_rhoEdgeNeg0 ( f , myInstance )
rhoScrewPos ( s ) = constitutive_nonlocal_rhoScrewPos0 ( f , myInstance )
rhoScrewNeg ( s ) = constitutive_nonlocal_rhoScrewNeg0 ( f , myInstance )
enddo ; enddo
!*** calculate the dependent state variables
! forest dislocation density
forall ( s = 1 : ns ) &
rhoForest ( s ) = dot_product ( ( rhoEdgePos + rhoEdgeNeg ) , constitutive_nonlocal_forestProjectionEdge ( 1 : ns , s , myInstance ) ) &
+ dot_product ( ( rhoScrewPos + rhoScrewNeg ) , constitutive_nonlocal_forestProjectionScrew ( 1 : ns , s , myInstance ) ) ! calculation of forest dislocation density as projection of screw and edge dislocations
! threshold shear stress for dislocation slip
forall ( s = 1 : ns ) &
tauSlipThreshold ( s ) = constitutive_nonlocal_Gmod ( myInstance ) &
* constitutive_nonlocal_burgersBySlipSystem ( s , myInstance ) &
* sqrt ( dot_product ( ( rhoEdgePos + rhoEdgeNeg + rhoScrewPos + rhoScrewNeg ) , &
constitutive_nonlocal_interactionMatrixSlipSlip ( 1 : ns , s , myInstance ) ) )
!*** put everything together and in right order
constitutive_nonlocal_stateInit ( 1 : ns ) = rhoEdgePos
constitutive_nonlocal_stateInit ( ns + 1 : 2 * ns ) = rhoEdgeNeg
constitutive_nonlocal_stateInit ( 2 * ns + 1 : 3 * ns ) = rhoScrewPos
constitutive_nonlocal_stateInit ( 3 * ns + 1 : 4 * ns ) = rhoScrewNeg
constitutive_nonlocal_stateInit ( 4 * ns + 1 : 5 * ns ) = rhoForest
constitutive_nonlocal_stateInit ( 5 * ns + 1 : 6 * ns ) = tauSlipThreshold
endfunction
!*********************************************************************
!* calculates homogenized elacticity matrix *
!*********************************************************************
pure function constitutive_nonlocal_homogenizedC ( state , g , ip , el )
use prec , only : pReal , &
pInt , &
p_vec
use mesh , only : mesh_NcpElems , &
mesh_maxNips
use material , only : homogenization_maxNgrains , &
material_phase , &
phase_constitutionInstance
implicit none
!*** input variables
integer ( pInt ) , intent ( in ) :: g , & ! current grain ID
ip , & ! current integration point
el ! current element
type ( p_vec ) , dimension ( homogenization_maxNgrains , mesh_maxNips , mesh_NcpElems ) , intent ( in ) :: state ! microstructural state
!*** output variables
real ( pReal ) , dimension ( 6 , 6 ) :: constitutive_nonlocal_homogenizedC ! homogenized elasticity matrix
!*** local variables
integer ( pInt ) myInstance ! current instance of this constitution
myInstance = phase_constitutionInstance ( material_phase ( g , ip , el ) )
constitutive_nonlocal_homogenizedC = constitutive_nonlocal_Cslip_66 ( : , : , myInstance )
endfunction
!*********************************************************************
!* calculates quantities characterizing the microstructure *
!*********************************************************************
subroutine constitutive_nonlocal_microstructure ( Temperature , Fp , state , g , ip , el )
use prec , only : pReal , &
pInt , &
p_vec
use math , only : math_Plain3333to99 , &
math_Mandel33to6 , &
math_Mandel6to33 , &
math_mul33x33 , &
math_mul3x3 , &
math_mul33x3 , &
math_transpose3x3 , &
pi
use mesh , only : mesh_NcpElems , &
mesh_maxNips , &
mesh_element , &
FE_NipNeighbors , &
mesh_ipNeighborhood , &
mesh_ipVolume , &
mesh_ipCenterOfGravity
use material , only : homogenization_maxNgrains , &
material_phase , &
phase_constitutionInstance
use lattice , only : lattice_Sslip , &
lattice_Sslip_v , &
lattice_maxNslipFamily , &
lattice_NslipSystem , &
lattice_maxNslip , &
lattice_sd , &
lattice_sn , &
lattice_st
implicit none
!*** input variables
integer ( pInt ) , intent ( in ) :: g , & ! current grain ID
ip , & ! current integration point
el ! current element
real ( pReal ) , intent ( in ) :: Temperature ! temperature
real ( pReal ) , dimension ( 3 , 3 , homogenization_maxNgrains , mesh_maxNips , mesh_NcpElems ) , intent ( in ) :: &
Fp ! plastic deformation gradient
!*** input/output variables
type ( p_vec ) , dimension ( homogenization_maxNgrains , mesh_maxNips , mesh_NcpElems ) , intent ( inout ) :: &
state ! microstructural state
!*** output variables
!*** local variables
integer ( pInt ) myInstance , & ! current instance of this constitution
myStructure , & ! current lattice structure
ns , & ! short notation for the total number of active slip systems
neighboring_el , & ! element number of my neighbor
neighboring_ip , & ! integration point of my neighbor
n , & ! index of my current neighbor
s , & ! index of my current slip system
sLattice ! index of my current slip system as specified by lattice
real ( pReal ) gb , & ! short notation for G*b/2/pi
x , & ! coordinate in direction of lvec
y , & ! coordinate in direction of bvec
z ! coordinate in direction of nvec
real ( pReal ) , dimension ( 3 ) :: connectingVector ! vector connecting the centers of gravity of me and my neigbor
real ( pReal ) , dimension ( 6 ) :: backStress_v ! backstress resulting from the neighboring excess dislocation densities as 2nd Piola-Kirchhoff stress in Mandel notation
real ( pReal ) , dimension ( 3 , 3 ) :: transform , & ! orthogonal transformation matrix from slip coordinate system with e1=bxn, e2=b, e3=n to lattice coordinate system
sigma ! backstress resulting from the excess dislocation density of a single slip system and a single neighbor calculated in the coordinate system of the slip system
real ( pReal ) , dimension ( constitutive_nonlocal_totalNslip ( phase_constitutionInstance ( material_phase ( g , ip , el ) ) ) ) :: &
rhoEdgePos , & ! positive edge dislocation density
rhoEdgeNeg , & ! negative edge dislocation density
rhoScrewPos , & ! positive screw dislocation density
rhoScrewNeg , & ! negative screw dislocation density
rhoForest , & ! forest dislocation density
tauSlipThreshold , & ! threshold shear stress
neighboring_rhoEdgePos , & ! positive edge dislocation density of my neighbor
neighboring_rhoEdgeNeg , & ! negative edge dislocation density of my neighbor
neighboring_rhoScrewPos , & ! positive screw dislocation density of my neighbor
neighboring_rhoScrewNeg , & ! negative screw dislocation density of my neighbor
neighboring_rhoEdgeExcess , & ! edge excess dislocation density of my neighbor
neighboring_rhoScrewExcess , & ! screw excess dislocation density of my neighbor
neighboring_Nedge , & ! total number of edge excess dislocations in my neighbor
neighboring_Nscrew
myInstance = phase_constitutionInstance ( material_phase ( g , ip , el ) )
myStructure = constitutive_nonlocal_structure ( myInstance )
ns = constitutive_nonlocal_totalNslip ( myInstance )
!**********************************************************************
!*** get basic states
rhoEdgePos = state ( g , ip , el ) % p ( 1 : ns )
rhoEdgeNeg = state ( g , ip , el ) % p ( ns + 1 : 2 * ns )
rhoScrewPos = state ( g , ip , el ) % p ( 2 * ns + 1 : 3 * ns )
rhoScrewNeg = state ( g , ip , el ) % p ( 3 * ns + 1 : 4 * ns )
!**********************************************************************
!*** calculate dependent states
!*** calculate the forest dislocation density
forall ( s = 1 : ns ) &
rhoForest ( s ) = dot_product ( ( rhoEdgePos + rhoEdgeNeg ) , constitutive_nonlocal_forestProjectionEdge ( 1 : ns , s , myInstance ) ) &
+ dot_product ( ( rhoScrewPos + rhoScrewNeg ) , constitutive_nonlocal_forestProjectionScrew ( 1 : ns , s , myInstance ) ) ! calculation of forest dislocation density as projection of screw and edge dislocations
!*** calculate the threshold shear stress for dislocation slip
forall ( s = 1 : ns ) &
tauSlipThreshold ( s ) = constitutive_nonlocal_Gmod ( myInstance ) &
* constitutive_nonlocal_burgersBySlipSystem ( s , myInstance ) &
* sqrt ( dot_product ( ( rhoEdgePos + rhoEdgeNeg + rhoScrewPos + rhoScrewNeg ) , &
constitutive_nonlocal_interactionMatrixSlipSlip ( 1 : ns , s , myInstance ) ) )
!*** calculate the backstress of the neighboring excess dislocation densities
backStress_v = 0.0_pReal
! loop through my neighbors (if it exists!)
do n = 1 , FE_NipNeighbors ( mesh_element ( 2 , el ) )
neighboring_el = mesh_ipNeighborhood ( 1 , n , ip , el )
neighboring_ip = mesh_ipNeighborhood ( 2 , n , ip , el )
if ( neighboring_el == 0 . or . neighboring_ip == 0 ) cycle
! calculate the connecting vector between me and my neighbor and his excess dislocation density
connectingVector = math_mul33x3 ( Fp ( : , : , g , ip , el ) , &
( mesh_ipCenterOfGravity ( : , ip , el ) - mesh_ipCenterOfGravity ( : , neighboring_ip , neighboring_el ) ) )
neighboring_rhoEdgePos = state ( 1 , neighboring_ip , neighboring_el ) % p ( 1 : ns )
neighboring_rhoEdgeNeg = state ( 1 , neighboring_ip , neighboring_el ) % p ( ns + 1 : 2 * ns )
neighboring_rhoScrewPos = state ( 1 , neighboring_ip , neighboring_el ) % p ( 2 * ns + 1 : 3 * ns )
neighboring_rhoScrewNeg = state ( 1 , neighboring_ip , neighboring_el ) % p ( 3 * ns + 1 : 4 * ns )
neighboring_rhoEdgeExcess = neighboring_rhoEdgePos - neighboring_rhoEdgeNeg
neighboring_rhoScrewExcess = neighboring_rhoScrewPos - neighboring_rhoScrewNeg
neighboring_Nedge = neighboring_rhoEdgeExcess * mesh_ipVolume ( neighboring_ip , neighboring_el ) ** ( 2.0_pReal / 3.0_pReal )
neighboring_Nscrew = neighboring_rhoScrewExcess * mesh_ipVolume ( neighboring_ip , neighboring_el ) ** ( 2.0_pReal / 3.0_pReal )
! loop over slip systems and get their slip directions, slip normals, and sd x sn
do s = 1 , ns
transform = reshape ( ( / lattice_st ( : , constitutive_nonlocal_slipSystemLattice ( s , myInstance ) , myStructure ) , &
lattice_sd ( : , constitutive_nonlocal_slipSystemLattice ( s , myInstance ) , myStructure ) , &
lattice_sn ( : , constitutive_nonlocal_slipSystemLattice ( s , myInstance ) , myStructure ) / ) , ( / 3 , 3 / ) )
! coordinate transformation of p from the lattice coordinate system to the slip coordinate system
x = math_mul3x3 ( connectingVector , transform ( : , 1 ) )
y = math_mul3x3 ( connectingVector , transform ( : , 2 ) )
z = math_mul3x3 ( connectingVector , transform ( : , 3 ) )
! calculate the back stress in the slip coordinate system for this slip system
gb = constitutive_nonlocal_Gmod ( myInstance ) * constitutive_nonlocal_burgersBySlipSystem ( s , myInstance ) / ( 2.0_pReal * pi )
sigma ( 2 , 2 ) = - gb * neighboring_Nedge ( s ) / ( 1.0_pReal - constitutive_nonlocal_nu ( myInstance ) ) &
* z * ( 3.0_pReal * y ** 2.0_pReal + z ** 2.0_pReal ) / ( y ** 2.0_pReal + z ** 2.0_pReal ) ** 2.0_pReal
sigma ( 3 , 3 ) = gb * neighboring_Nedge ( s ) / ( 1.0_pReal - constitutive_nonlocal_nu ( myInstance ) ) &
* z * ( y ** 2.0_pReal - z ** 2.0_pReal ) / ( y ** 2.0_pReal + z ** 2.0_pReal ) ** 2.0_pReal
sigma ( 1 , 1 ) = constitutive_nonlocal_nu ( myInstance ) * ( sigma ( 2 , 2 ) + sigma ( 3 , 3 ) )
sigma ( 1 , 2 ) = gb * neighboring_Nscrew ( s ) * z / ( x ** 2.0_pReal + z ** 2.0_pReal )
sigma ( 2 , 3 ) = gb * ( neighboring_Nedge ( s ) / ( 1.0_pReal - constitutive_nonlocal_nu ( myInstance ) ) &
* ( y ** 2.0_pReal - z ** 2.0_pReal ) / ( y ** 2.0_pReal + z ** 2.0_pReal ) &
- neighboring_Nscrew ( s ) * x / ( x ** 2.0_pReal + z ** 2.0_pReal ) )
sigma ( 2 , 1 ) = sigma ( 1 , 2 )
sigma ( 3 , 2 ) = sigma ( 2 , 3 )
sigma ( 1 , 3 ) = 0.0_pReal
sigma ( 3 , 1 ) = 0.0_pReal
! coordinate transformation from the slip coordinate system to the lattice coordinate system
backStress_v = backStress_v + math_Mandel33to6 ( math_mul33x33 ( math_transpose3x3 ( transform ) , math_mul33x33 ( sigma , transform ) ) )
enddo
enddo
!**********************************************************************
!*** set dependent states
state ( g , ip , el ) % p ( 4 * ns + 1 : 5 * ns ) = rhoForest
state ( g , ip , el ) % p ( 5 * ns + 1 : 6 * ns ) = tauSlipThreshold
state ( g , ip , el ) % p ( 6 * ns + 1 : 6 * ns + 6 ) = backstress_v
endsubroutine
!*********************************************************************
!* calculates plastic velocity gradient and its tangent *
!*********************************************************************
subroutine constitutive_nonlocal_LpAndItsTangent ( Lp , dLp_dTstar99 , Tstar_v , Temperature , state , g , ip , el )
use prec , only : pReal , &
pInt , &
p_vec
use math , only : math_Plain3333to99 , &
math_mul6x6 , &
math_Mandel6to33
use debug , only : debugger
use mesh , only : mesh_NcpElems , &
mesh_maxNips
use material , only : homogenization_maxNgrains , &
material_phase , &
phase_constitutionInstance
use lattice , only : lattice_Sslip , &
lattice_Sslip_v
implicit none
!*** input variables
integer ( pInt ) , intent ( in ) :: g , & ! current grain number
ip , & ! current integration point
el ! current element number
real ( pReal ) , intent ( in ) :: Temperature ! temperature
type ( p_vec ) , dimension ( homogenization_maxNgrains , mesh_maxNips , mesh_NcpElems ) , intent ( in ) :: &
state ! microstructural state
real ( pReal ) , dimension ( 6 ) , intent ( in ) :: Tstar_v ! 2nd Piola-Kirchhoff stress in Mandel notation
!*** output variables
real ( pReal ) , dimension ( 3 , 3 ) , intent ( out ) :: Lp ! plastic velocity gradient
real ( pReal ) , dimension ( 9 , 9 ) , intent ( out ) :: dLp_dTstar99 ! derivative of Lp with respect to Tstar (9x9 matrix)
!*** local variables
integer ( pInt ) myInstance , & ! current instance of this constitution
myStructure , & ! current lattice structure
ns , & ! short notation for the total number of active slip systems
i , &
j , &
k , &
l , &
t , & ! dislocation type
s , & ! index of my current slip system
sLattice ! index of my current slip system as specified by lattice
real ( pReal ) , dimension ( 6 ) :: backStress_v ! backstress resulting from the neighboring excess dislocation densities as 2nd Piola-Kirchhoff stress
real ( pReal ) , dimension ( 3 , 3 , 3 , 3 ) :: dLp_dTstar3333 ! derivative of Lp with respect to Tstar (3x3x3x3 matrix)
real ( pReal ) , dimension ( 4 , constitutive_nonlocal_totalNslip ( phase_constitutionInstance ( material_phase ( g , ip , el ) ) ) ) :: &
rho ! dislocation densities
real ( pReal ) , dimension ( constitutive_nonlocal_totalNslip ( phase_constitutionInstance ( material_phase ( g , ip , el ) ) ) ) :: &
rhoForest , & ! forest dislocation density
tauSlipThreshold , & ! threshold shear stress
tauSlip , & ! resolved shear stress
gdotSlip , & ! shear rate
dgdot_dtauSlip , & ! derivative of the shear rate with respect to the shear stress
v ! dislocation velocity
!*** initialize local variables
v = 0.0_pReal
tauSlip = 0.0_pReal
gdotSlip = 0.0_pReal
Lp = 0.0_pReal
dLp_dTstar3333 = 0.0_pReal
myInstance = phase_constitutionInstance ( material_phase ( g , ip , el ) )
myStructure = constitutive_nonlocal_structure ( myInstance )
ns = constitutive_nonlocal_totalNslip ( myInstance )
!*** shortcut to state variables
forall ( t = 1 : 4 ) rho ( t , : ) = state ( g , ip , el ) % p ( ( t - 1 ) * ns + 1 : t * ns )
rhoForest = state ( g , ip , el ) % p ( 4 * ns + 1 : 5 * ns )
tauSlipThreshold = state ( g , ip , el ) % p ( 5 * ns + 1 : 6 * ns )
backStress_v = state ( g , ip , el ) % p ( 6 * ns + 1 : 6 * ns + 6 )
! if (debugger) write(6,'(a20,3(i3,x),/,3(3(f12.3,x)/))') 'backstress / MPa at ', g,ip,el, math_Mandel6to33(backStress_v/1e6)
! if (debugger) write(6,'(a15,3(i3,x),/,3(3(f12.3,x)/))') 'Tstar / MPa at ',g,ip,el, math_Mandel6to33(Tstar_v/1e6)
!*** loop over slip systems
do s = 1 , constitutive_nonlocal_totalNslip ( myInstance )
sLattice = constitutive_nonlocal_slipSystemLattice ( s , myInstance )
!*** Calculation of Lp
tauSlip ( s ) = math_mul6x6 ( Tstar_v + backStress_v , lattice_Sslip_v ( : , sLattice , myStructure ) )
if ( rhoForest ( s ) > 0.0_pReal ) &
v ( s ) = constitutive_nonlocal_v0BySlipSystem ( s , myInstance ) &
* exp ( - ( tauSlipThreshold ( s ) - abs ( tauSlip ( s ) ) ) * constitutive_nonlocal_burgersBySlipSystem ( s , myInstance ) ** 2.0_pReal &
/ ( kB * Temperature * sqrt ( rhoForest ( s ) ) ) ) &
* sign ( 1.0_pReal , tauSlip ( s ) )
gdotSlip ( s ) = sum ( rho ( : , s ) ) * constitutive_nonlocal_burgersBySlipSystem ( s , myInstance ) * v ( s )
Lp = Lp + gdotSlip ( s ) * lattice_Sslip ( : , : , sLattice , myStructure )
!*** Calculation of the tangent of Lp
dgdot_dtauSlip ( s ) = gdotSlip ( s ) * constitutive_nonlocal_burgersBySlipSystem ( s , myInstance ) ** 2.0_pReal &
/ ( kB * Temperature * sqrt ( rhoForest ( s ) ) )
forall ( i = 1 : 3 , j = 1 : 3 , k = 1 : 3 , l = 1 : 3 ) &
dLp_dTstar3333 ( i , j , k , l ) = dLp_dTstar3333 ( i , j , k , l ) + dgdot_dtauSlip ( s ) * lattice_Sslip ( i , j , sLattice , myStructure ) &
* lattice_Sslip ( k , l , sLattice , myStructure )
enddo
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dLp_dTstar99 = math_Plain3333to99 ( dLp_dTstar3333 )
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!if (debugger) write(6,'(a26,3(i3,x),/,12(f10.3,x),/)') 'tauSlipThreshold / MPa at ',g,ip,el, tauSlipThreshold/1e6
!if (debugger) write(6,'(a15,3(i3,x),/,12(f10.3,x),/)') 'tauSlip / MPa at ',g,ip,el, tauSlip/1e6
!if (debugger) write(6,'(a15,3(i3,x),/,12(e10.3,x),/)') 'gdotSlip at ',g,ip,el, gdotSlip
endsubroutine
!*********************************************************************
!* rate of change of microstructure *
!*********************************************************************
subroutine constitutive_nonlocal_dotState ( dotState , Tstar_v , Fp , invFp , Temperature , state , g , ip , el )
use prec , only : pReal , &
pInt , &
p_vec
use debug , only : debugger
use math , only : math_norm3 , &
math_mul6x6 , &
math_mul3x3 , &
math_mul33x3 , &
math_transpose3x3
use mesh , only : mesh_NcpElems , &
mesh_maxNips , &
mesh_element , &
FE_NipNeighbors , &
mesh_ipNeighborhood , &
mesh_ipVolume , &
mesh_ipArea , &
mesh_ipAreaNormal
use material , only : homogenization_maxNgrains , &
material_phase , &
phase_constitutionInstance
use lattice , only : lattice_Sslip , &
lattice_Sslip_v , &
lattice_sd , &
lattice_sn , &
lattice_st , &
lattice_maxNslipFamily , &
lattice_NslipSystem
implicit none
!*** input variables
integer ( pInt ) , intent ( in ) :: g , & ! current grain number
ip , & ! current integration point
el ! current element number
real ( pReal ) , intent ( in ) :: Temperature ! temperature
real ( pReal ) , dimension ( 6 ) , intent ( in ) :: Tstar_v ! 2nd Piola-Kirchhoff stress in Mandel notation
real ( pReal ) , dimension ( 3 , 3 ) , intent ( in ) :: Fp , & ! plastic deformation gradient
invFp ! inverse of plastic deformation gradient
type ( p_vec ) , dimension ( homogenization_maxNgrains , mesh_maxNips , mesh_NcpElems ) , intent ( in ) :: &
state ! microstructural state
!*** input/output variables
type ( p_vec ) , dimension ( homogenization_maxNgrains , mesh_maxNips , mesh_NcpElems ) , intent ( inout ) :: &
dotState ! evolution of state variables / microstructure
!*** output variables
!*** local variables
integer ( pInt ) myInstance , & ! current instance of this constitution
myStructure , & ! current lattice structure
ns , & ! short notation for the total number of active slip systems
neighboring_el , & ! element number of my neighbor
neighboring_ip , & ! integration point of my neighbor
n , & ! index of my current neighbor
t , & ! type of dislocation
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s ! index of my current slip system
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real ( pReal ) , dimension ( 4 , constitutive_nonlocal_totalNslip ( phase_constitutionInstance ( material_phase ( g , ip , el ) ) ) ) :: &
rho , & ! dislocation densities
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gdot , & ! shear rates
lineLength ! dislocation line length leaving the current interface
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real ( pReal ) , dimension ( constitutive_nonlocal_totalNslip ( phase_constitutionInstance ( material_phase ( g , ip , el ) ) ) ) :: &
rhoForest , & ! forest dislocation density
tauSlipThreshold , & ! threshold shear stress
tauSlip , & ! resolved shear stress
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v , & ! dislocation velocity
invLambda ! inverse of mean free path for dislocations
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real ( pReal ) , dimension ( 3 , 4 , constitutive_nonlocal_totalNslip ( phase_constitutionInstance ( material_phase ( g , ip , el ) ) ) ) :: &
m ! direction of dislocation motion
real ( pReal ) , dimension ( 6 ) :: backStress_v ! backstress resulting from the neighboring excess dislocation densities as 2nd Piola-Kirchhoff stress
real ( pReal ) , dimension ( 3 ) :: surfaceNormal ! surface normal of the current interface
real ( pReal ) norm_surfaceNormal , & ! euclidic norm of the surface normal
area ! area of the current interface
myInstance = phase_constitutionInstance ( material_phase ( g , ip , el ) )
myStructure = constitutive_nonlocal_structure ( myInstance )
ns = constitutive_nonlocal_totalNslip ( myInstance )
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tauSlip = 0.0_pReal
v = 0.0_pReal
gdot = 0.0_pReal
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!*** shortcut to state variables
forall ( t = 1 : 4 ) rho ( t , : ) = state ( g , ip , el ) % p ( ( t - 1 ) * ns + 1 : t * ns )
rhoForest = state ( g , ip , el ) % p ( 4 * ns + 1 : 5 * ns )
tauSlipThreshold = state ( g , ip , el ) % p ( 5 * ns + 1 : 6 * ns )
backStress_v = state ( g , ip , el ) % p ( 6 * ns + 1 : 6 * ns + 6 )
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!****************************************************************************
!*** Calculate shear rate
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do s = 1 , ns
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tauSlip ( s ) = math_mul6x6 ( Tstar_v + backStress_v , &
lattice_Sslip_v ( : , constitutive_nonlocal_slipSystemLattice ( s , myInstance ) , myStructure ) )
forall ( s = 1 : ns , rhoForest ( s ) > 0.0_pReal ) &
v ( s ) = constitutive_nonlocal_v0BySlipSystem ( s , myInstance ) &
* exp ( - ( tauSlipThreshold ( s ) - abs ( tauSlip ( s ) ) ) * constitutive_nonlocal_burgersBySlipSystem ( s , myInstance ) ** 2.0_pReal &
/ ( kB * Temperature * sqrt ( rhoForest ( s ) ) ) ) &
* sign ( 1.0_pReal , tauSlip ( s ) )
forall ( t = 1 : 4 , s = 1 : ns ) &
gdot ( t , s ) = rho ( t , s ) * constitutive_nonlocal_burgersBySlipSystem ( s , myInstance ) * v ( s )
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enddo
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!****************************************************************************
!*** calculate dislocation multiplication
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invLambda = sqrt ( rhoForest ) / constitutive_nonlocal_lambda0BySlipSystem ( : , myInstance )
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forall ( t = 1 : 4 , s = 1 : ns ) &
dotState ( 1 , ip , el ) % p ( ( t - 1 ) * ns + s ) = dotState ( 1 , ip , el ) % p ( ( t - 1 ) * ns + s ) + 0.25_pReal * sum ( gdot ( : , s ) ) * invLambda ( s ) &
/ constitutive_nonlocal_burgersBySlipSystem ( s , myInstance )
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!****************************************************************************
!*** calculate dislocation fluxes
! Direction of dislocation motion
m ( : , 1 , : ) = lattice_sd ( : , constitutive_nonlocal_slipSystemLattice ( : , myInstance ) , myStructure )
m ( : , 2 , : ) = - lattice_sd ( : , constitutive_nonlocal_slipSystemLattice ( : , myInstance ) , myStructure )
m ( : , 3 , : ) = lattice_st ( : , constitutive_nonlocal_slipSystemLattice ( : , myInstance ) , myStructure )
m ( : , 4 , : ) = - lattice_st ( : , constitutive_nonlocal_slipSystemLattice ( : , myInstance ) , myStructure )
! loop through my neighbors
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do n = 1 , FE_NipNeighbors ( mesh_element ( 2 , el ) )
neighboring_el = mesh_ipNeighborhood ( 1 , n , ip , el )
neighboring_ip = mesh_ipNeighborhood ( 2 , n , ip , el )
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! calculate the area and the surface normal of the interface
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surfaceNormal = math_mul33x3 ( math_transpose3x3 ( invFp ) , mesh_ipAreaNormal ( : , n , ip , el ) )
norm_surfaceNormal = math_norm3 ( surfaceNormal )
surfaceNormal = surfaceNormal / norm_surfaceNormal
area = mesh_ipArea ( n , ip , el ) / norm_surfaceNormal
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! loop through my interfaces
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do s = 1 , ns
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lineLength = 0.0_pReal
! loop through dislocation types
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do t = 1 , 4
if ( sign ( 1.0_pReal , math_mul3x3 ( m ( : , t , s ) , surfaceNormal ) ) == sign ( 1.0_pReal , gdot ( t , s ) ) ) then
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! dislocation line length that leaves this interface per second
lineLength ( t , s ) = gdot ( t , s ) / constitutive_nonlocal_burgersBySlipSystem ( s , myInstance ) &
* math_mul3x3 ( m ( : , t , s ) , surfaceNormal ) * area
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! subtract dislocation density rate (= line length over volume) that leaves through an interface from my dotState ...
dotState ( 1 , ip , el ) % p ( ( t - 1 ) * ns + s ) = dotState ( 1 , ip , el ) % p ( ( t - 1 ) * ns + s ) - lineLength ( t , s ) / mesh_ipVolume ( ip , el )
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! ... and add them to the neighboring dotState (if neighbor exists)
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if ( neighboring_el > 0 . and . neighboring_ip > 0 ) then
!*****************************************************************************************************
!*** OMP locking for this neighbor missing
!*****************************************************************************************************
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dotState ( 1 , neighboring_ip , neighboring_el ) % p ( ( t - 1 ) * ns + s ) = dotState ( 1 , neighboring_ip , neighboring_el ) % p ( ( t - 1 ) * ns + s ) &
+ lineLength ( t , s ) / mesh_ipVolume ( neighboring_ip , neighboring_el )
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endif
endif
enddo
enddo
enddo
endsubroutine
!*********************************************************************
!* rate of change of temperature *
!*********************************************************************
pure function constitutive_nonlocal_dotTemperature ( Tstar_v , Temperature , state , g , ip , el )
use prec , only : pReal , &
pInt , &
p_vec
use mesh , only : mesh_NcpElems , &
mesh_maxNips
use material , only : homogenization_maxNgrains
implicit none
!* input variables
integer ( pInt ) , intent ( in ) :: g , & ! current grain ID
ip , & ! current integration point
el ! current element
real ( pReal ) , intent ( in ) :: Temperature ! temperature
real ( pReal ) , dimension ( 6 ) , intent ( in ) :: Tstar_v ! 2nd Piola-Kirchhoff stress in Mandel notation
type ( p_vec ) , dimension ( homogenization_maxNgrains , mesh_maxNips , mesh_NcpElems ) , intent ( in ) :: &
state ! microstructural state
!* output variables
real ( pReal ) constitutive_nonlocal_dotTemperature ! evolution of Temperature
!* local variables
constitutive_nonlocal_dotTemperature = 0.0_pReal
endfunction
!*********************************************************************
!* return array of constitutive results *
!* INPUT: *
!* - Temperature : temperature *
!* - Tstar_v : 2nd Piola Kirchhoff stress tensor (Mandel) *
!* - dt : current time increment *
!* - ipc : component-ID at current integration point *
!* - ip : current integration point *
!* - el : current element *
!*********************************************************************
pure function constitutive_nonlocal_postResults ( Tstar_v , Temperature , dt , state , ipc , ip , el )
use prec , only : pReal , pInt , p_vec
use mesh , only : mesh_NcpElems , mesh_maxNips
use material , only : homogenization_maxNgrains , material_phase , phase_constitutionInstance , phase_Noutput
use lattice , only : lattice_Sslip_v , lattice_Stwin_v , lattice_maxNslipFamily , lattice_maxNtwinFamily , &
lattice_NslipSystem , lattice_NtwinSystem , lattice_shearTwin
implicit none
!* Definition of variables
integer ( pInt ) , intent ( in ) :: ipc , ip , el
real ( pReal ) , intent ( in ) :: dt , Temperature
real ( pReal ) , dimension ( 6 ) , intent ( in ) :: Tstar_v
type ( p_vec ) , dimension ( homogenization_maxNgrains , mesh_maxNips , mesh_NcpElems ) , intent ( in ) :: state
integer ( pInt ) matID , structID , ns , nt , f , o , i , c , j , index_myFamily
real ( pReal ) sumf , tau
real ( pReal ) , dimension ( constitutive_nonlocal_sizePostResults ( phase_constitutionInstance ( material_phase ( ipc , ip , el ) ) ) ) :: &
constitutive_nonlocal_postResults
!* Shortened notation
matID = phase_constitutionInstance ( material_phase ( ipc , ip , el ) )
structID = constitutive_nonlocal_structure ( matID )
ns = constitutive_nonlocal_totalNslip ( matID )
!* Required output
c = 0_pInt
constitutive_nonlocal_postResults = 0.0_pReal
do o = 1 , phase_Noutput ( material_phase ( ipc , ip , el ) )
select case ( constitutive_nonlocal_output ( o , matID ) )
case ( 'dislocationdensity' )
constitutive_nonlocal_postResults ( c + 1 : c + ns ) = state ( ipc , ip , el ) % p ( 1 : ns )
c = c + ns
end select
enddo
endfunction
END MODULE