!-------------------------------------------------------------------------------------------------- !> @author Franz Roters, Max-Planck-Institut für Eisenforschung GmbH !> @author Philip Eisenlohr, Max-Planck-Institut für Eisenforschung GmbH !> @author David Cereceda, Lawrence Livermore National Laboratory !> @author Martin Diehl, Max-Planck-Institut für Eisenforschung GmbH !> @brief material subroutine incoprorating dislocation and twinning physics !> @details to be done !-------------------------------------------------------------------------------------------------- module plastic_disloUCLA use prec, only: & pReal, & pInt implicit none private integer(pInt), dimension(:), allocatable, public, protected :: & plastic_disloUCLA_sizePostResults !< cumulative size of post results integer(pInt), dimension(:,:), allocatable, target, public :: & plastic_disloUCLA_sizePostResult !< size of each post result output character(len=64), dimension(:,:), allocatable, target, public :: & plastic_disloUCLA_output !< name of each post result output real(pReal), parameter, private :: & kB = 1.38e-23_pReal !< Boltzmann constant in J/Kelvin integer(pInt), dimension(:), allocatable, target, public :: & plastic_disloUCLA_Noutput !< number of outputs per instance of this plasticity integer(pInt), dimension(:), allocatable, private :: & plastic_disloUCLA_totalNslip !< total number of active slip systems for each instance integer(pInt), dimension(:,:), allocatable, private :: & plastic_disloUCLA_Nslip !< number of active slip systems for each family and instance real(pReal), dimension(:), allocatable, private :: & plastic_disloUCLA_CAtomicVolume, & !< atomic volume in Bugers vector unit plastic_disloUCLA_D0, & !< prefactor for self-diffusion coefficient plastic_disloUCLA_Qsd, & !< activation energy for dislocation climb plastic_disloUCLA_CEdgeDipMinDistance, & !< plastic_disloUCLA_SolidSolutionStrength, & !< Strength due to elements in solid solution plastic_disloUCLA_dipoleFormationFactor !< scaling factor for dipole formation: 0: off, 1: on. other values not useful real(pReal), dimension(:,:), allocatable, private :: & plastic_disloUCLA_v0PerSlipFamily, & !< dislocation velocity prefactor [m/s] for each family and instance plastic_disloUCLA_v0PerSlipSystem, & !< dislocation velocity prefactor [m/s] for each slip system and instance plastic_disloUCLA_CLambdaSlipPerSlipFamily, & !< Adj. parameter for distance between 2 forest dislocations for each slip family and instance plastic_disloUCLA_CLambdaSlipPerSlipSystem, & !< Adj. parameter for distance between 2 forest dislocations for each slip system and instance plastic_disloUCLA_interaction_SlipSlip, & !< coefficients for slip-slip interaction for each interaction type and instance !* mobility law parameters plastic_disloUCLA_friction !< friction coeff. B (kMC) real(pReal), dimension(:,:,:), allocatable, private :: & plastic_disloUCLA_interactionMatrix_SlipSlip, & !< interaction matrix of the different slip systems for each instance plastic_disloUCLA_forestProjectionEdge !< matrix of forest projections of edge dislocations for each instance enum, bind(c) enumerator :: undefined_ID, & rho_ID, & rhoDip_ID, & shearrate_ID, & accumulatedshear_ID, & mfp_ID, & resolvedstress_ID, & thresholdstress_ID, & dipoledistance_ID, & stressexponent_ID end enum type, private :: tParameters real(pReal) :: & aTolRho, & grainSize real(pReal), allocatable, dimension(:) :: & rho0, & !< initial edge dislocation density per slip system for each family and instance rhoDip0, & !< initial edge dipole density per slip system for each family and instance burgers, & !< absolute length of burgers vector [m] for each slip system and instance H0kp, & !< activation energy for glide [J] for each slip system and instance v0, & !< dislocation velocity prefactor [m/s] for each family and instance CLambda, & !< Adj. parameter for distance between 2 forest dislocations for each slip system and instance p, & !< p-exponent in glide velocity q, & !< q-exponent in glide velocity !* mobility law parameters kink_height, & !< height of the kink pair kink_width, & !< width of the kink pair omega, & !< attempt frequency for kink pair nucleation viscosity, & !< friction coeff. B (kMC) !* tau_Peierls, & nonSchmidCoeff real(pReal), allocatable, dimension(:,:) :: & interaction_SlipSlip !< slip resistance from slip activity real(pReal), allocatable, dimension(:,:,:) :: & Schmid_slip, & Schmid_twin, & nonSchmid_pos, & nonSchmid_neg integer(pInt) :: & totalNslip !< total number of active slip system integer(pInt), allocatable, dimension(:) :: & Nslip !< number of active slip systems for each family integer(kind(undefined_ID)), allocatable, dimension(:) :: & outputID !< ID of each post result output end type !< container type for internal constitutive parameters type(tParameters), dimension(:), allocatable, private :: param !< containers of constitutive parameters (len Ninstance) integer(kind(undefined_ID)), dimension(:,:), allocatable, private :: & plastic_disloUCLA_outputID !< ID of each post result output type, private :: tDisloUCLAState real(pReal), pointer, dimension(:,:) :: & rhoEdge, & rhoEdgeDip, & accshear_slip, & mfp_slip, & threshold_stress_slip end type type, private :: tDisloUCLAMicrostructure real(pReal), allocatable, dimension(:,:) :: & mfp, & threshold_stress end type tDisloUCLAMicrostructure type(tDisloUCLAState ), allocatable, dimension(:), private :: & state, & dotState type(tDisloUCLAMicrostructure), allocatable, dimension(:), private :: & microstructure public :: & plastic_disloUCLA_init, & plastic_disloUCLA_microstructure, & plastic_disloUCLA_LpAndItsTangent, & plastic_disloUCLA_dotState, & plastic_disloUCLA_postResults private :: & plastic_disloUCLA_stateInit contains !-------------------------------------------------------------------------------------------------- !> @brief module initialization !> @details reads in material parameters, allocates arrays, and does sanity checks !-------------------------------------------------------------------------------------------------- subroutine plastic_disloUCLA_init(fileUnit) #if defined(__GFORTRAN__) || __INTEL_COMPILER >= 1800 use, intrinsic :: iso_fortran_env, only: & compiler_version, & compiler_options #endif use debug, only: & debug_level,& debug_constitutive,& debug_levelBasic use math, only: & math_Mandel3333to66, & math_Voigt66to3333, & math_mul3x3, & math_expand 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_plasticity, & phase_plasticityInstance, & phase_Noutput, & PLASTICITY_DISLOUCLA_label, & PLASTICITY_DISLOUCLA_ID, & material_phase, & plasticState, & material_allocatePlasticState use config, only: & MATERIAL_partPhase, & config_phase use lattice implicit none integer(pInt), intent(in) :: fileUnit integer(pInt), allocatable, dimension(:) :: chunkPos integer(pInt) :: maxNinstance,mySize=0_pInt,phase,maxTotalNslip,& f,instance,j,k,o,ns, i, & Nchunks_SlipSlip = 0_pInt, outputSize, & Nchunks_SlipFamilies = 0_pInt,Nchunks_nonSchmid = 0_pInt, & offset_slip, index_myFamily, index_otherFamily, & startIndex, endIndex, p integer(pInt) :: sizeState, sizeDotState, sizeDeltaState integer(pInt) :: NofMyPhase character(len=65536) :: & structure = '',& tag = '', & line = '' real(pReal), dimension(:), allocatable :: tempPerSlip character(len=65536), dimension(:), allocatable :: outputs integer(kind(undefined_ID)) :: outputID integer(pInt), dimension(0), parameter :: emptyIntArray = [integer(pInt)::] real(pReal), dimension(0), parameter :: emptyRealArray = [real(pReal)::] character(len=65536), dimension(0), parameter :: emptyStringArray = [character(len=65536)::] write(6,'(/,a)') ' <<<+- constitutive_'//PLASTICITY_DISLOUCLA_label//' init -+>>>' write(6,'(/,a)') ' Cereceda et al., International Journal of Plasticity 78, 2016, 242-256' write(6,'(/,a)') ' http://dx.doi.org/10.1016/j.ijplas.2015.09.002' write(6,'(a15,a)') ' Current time: ',IO_timeStamp() #include "compilation_info.f90" maxNinstance = int(count(phase_plasticity == PLASTICITY_DISLOUCLA_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(plastic_disloUCLA_sizePostResults(maxNinstance), source=0_pInt) allocate(plastic_disloUCLA_sizePostResult(maxval(phase_Noutput),maxNinstance),source=0_pInt) allocate(plastic_disloUCLA_output(maxval(phase_Noutput),maxNinstance)) plastic_disloUCLA_output = '' allocate(plastic_disloUCLA_outputID(maxval(phase_Noutput),maxNinstance), source=undefined_ID) allocate(plastic_disloUCLA_Noutput(maxNinstance), source=0_pInt) allocate(plastic_disloUCLA_Nslip(lattice_maxNslipFamily,maxNinstance), source=0_pInt) allocate(plastic_disloUCLA_totalNslip(maxNinstance), source=0_pInt) allocate(plastic_disloUCLA_CAtomicVolume(maxNinstance), source=0.0_pReal) allocate(plastic_disloUCLA_D0(maxNinstance), source=0.0_pReal) allocate(plastic_disloUCLA_Qsd(maxNinstance), source=0.0_pReal) allocate(plastic_disloUCLA_CEdgeDipMinDistance(maxNinstance), source=0.0_pReal) allocate(plastic_disloUCLA_SolidSolutionStrength(maxNinstance), source=0.0_pReal) allocate(plastic_disloUCLA_dipoleFormationFactor(maxNinstance), source=1.0_pReal) !should be on by default allocate(plastic_disloUCLA_friction(lattice_maxNslipFamily,maxNinstance), source=0.0_pReal) allocate(plastic_disloUCLA_v0PerSlipFamily(lattice_maxNslipFamily,maxNinstance), source=0.0_pReal) allocate(plastic_disloUCLA_CLambdaSlipPerSlipFamily(lattice_maxNslipFamily,maxNinstance), & source=0.0_pReal) allocate(plastic_disloUCLA_interaction_SlipSlip(lattice_maxNinteraction,maxNinstance),source=0.0_pReal) allocate(param(maxNinstance)) allocate(state(maxNinstance)) allocate(dotState(maxNinstance)) allocate(microstructure(maxNinstance)) do p = 1_pInt, size(phase_plasticityInstance) if (phase_plasticity(p) /= PLASTICITY_DISLOUCLA_ID) cycle associate(prm => param(phase_plasticityInstance(p)), & dot => dotState(phase_plasticityInstance(p)), & stt => state(phase_plasticityInstance(p))) structure = config_phase(p)%getString('lattice_structure') prm%aTolRho = config_phase(p)%getFloat('atol_rho') !-------------------------------------------------------------------------------------------------- ! slip related parameters prm%Nslip = config_phase(p)%getInts('nslip',defaultVal=emptyIntArray) prm%totalNslip = sum(prm%Nslip) slipActive: if (prm%totalNslip > 0_pInt) then prm%Schmid_slip = lattice_SchmidMatrix_slip(prm%Nslip,structure(1:3),& config_phase(p)%getFloat('c/a',defaultVal=0.0_pReal)) if(structure=='bcc') then prm%nonSchmidCoeff = config_phase(p)%getFloats('nonschmid_coefficients',& defaultVal = emptyRealArray) prm%nonSchmid_pos = lattice_nonSchmidMatrix(prm%Nslip,prm%nonSchmidCoeff,+1_pInt) prm%nonSchmid_neg = lattice_nonSchmidMatrix(prm%Nslip,prm%nonSchmidCoeff,-1_pInt) else prm%nonSchmid_pos = prm%Schmid_slip prm%nonSchmid_neg = prm%Schmid_slip endif prm%interaction_SlipSlip = lattice_interaction_SlipSlip(prm%Nslip, & config_phase(p)%getFloats('interaction_slipslip'), & structure(1:3)) prm%rho0 = config_phase(p)%getFloats('rhoedge0') prm%rhoDip0 = config_phase(p)%getFloats('rhoedgedip0') prm%burgers = config_phase(p)%getFloats('slipburgers') prm%H0kp = config_phase(p)%getFloats('qedge') !prm%v0 = config_phase(p)%getFloats('v0') !prm%clambda = config_phase(p)%getFloats('clambda') prm%tau_Peierls = config_phase(p)%getFloats('tau_peierls') prm%p = config_phase(p)%getFloats('p_slip',defaultVal=[(1.0_pReal,i=1_pInt,size(prm%Nslip))]) prm%q = config_phase(p)%getFloats('q_slip',defaultVal=[(1.0_pReal,i=1_pInt,size(prm%Nslip))]) prm%kink_height = config_phase(p)%getFloats('kink_height') prm%kink_width = config_phase(p)%getFloats('kink_width') prm%omega = config_phase(p)%getFloats('omega') !prm%viscosity = config_phase(p)%getFloats('viscosity') prm%grainSize = config_phase(p)%getFloat('grainsize') ! expand: family => system prm%rho0 = math_expand(prm%rho0, prm%Nslip) prm%rhoDip0 = math_expand(prm%rhoDip0, prm%Nslip) prm%q = math_expand(prm%q, prm%Nslip) prm%p = math_expand(prm%p, prm%Nslip) prm%H0kp = math_expand(prm%H0kp, prm%Nslip) prm%burgers = math_expand(prm%burgers, prm%Nslip) prm%kink_height = math_expand(prm%kink_height, prm%Nslip) prm%kink_width = math_expand(prm%kink_width, prm%Nslip) prm%omega = math_expand(prm%omega, prm%Nslip) prm%tau_Peierls = math_expand(prm%tau_Peierls, prm%Nslip) endif slipActive !-------------------------------------------------------------------------------------------------- ! phase outputs #if defined(__GFORTRAN__) outputs = ['GfortranBug86277'] outputs = config_phase(p)%getStrings('(output)',defaultVal=outputs) if (outputs(1) == 'GfortranBug86277') outputs = emptyStringArray #else outputs = config_phase(p)%getStrings('(output)',defaultVal=emptyStringArray) #endif allocate(prm%outputID(0)) do i = 1_pInt, size(outputs) outputID = undefined_ID outputSize = prm%totalNslip select case(trim(outputs(i))) case ('edge_density') outputID = merge(rho_ID,undefined_ID,prm%totalNslip>0_pInt) case ('dipole_density') outputID = merge(rhoDip_ID,undefined_ID,prm%totalNslip>0_pInt) case ('shear_rate','shearrate','shear_rate_slip','shearrate_slip') outputID = merge(shearrate_ID,undefined_ID,prm%totalNslip>0_pInt) case ('accumulated_shear','accumulatedshear','accumulated_shear_slip') outputID = merge(accumulatedshear_ID,undefined_ID,prm%totalNslip>0_pInt) case ('mfp','mfp_slip') outputID = merge(mfp_ID,undefined_ID,prm%totalNslip>0_pInt) case ('resolved_stress','resolved_stress_slip') outputID = merge(resolvedstress_ID,undefined_ID,prm%totalNslip>0_pInt) case ('threshold_stress','threshold_stress_slip') outputID = merge(thresholdstress_ID,undefined_ID,prm%totalNslip>0_pInt) case ('edge_dipole_distance') outputID = merge(dipoleDistance_ID,undefined_ID,prm%totalNslip>0_pInt) case ('stress_exponent') outputID = merge(stressexponent_ID,undefined_ID,prm%totalNslip>0_pInt) end select if (outputID /= undefined_ID) then plastic_disloUCLA_output(i,phase_plasticityInstance(p)) = outputs(i) plastic_disloUCLA_sizePostResult(i,phase_plasticityInstance(p)) = outputSize prm%outputID = [prm%outputID, outputID] plastic_disloUCLA_outputID(i,phase_plasticityInstance(p)) = outputID plastic_disloUCLA_sizePostResults(phase_plasticityInstance(p)) = & plastic_disloUCLA_sizePostResults(phase_plasticityInstance(p)) + outputSize plastic_disloUCLA_Noutput(phase_plasticityInstance(p)) = plastic_disloUCLA_Noutput(phase_plasticityInstance(p)) + 1_pInt endif enddo end associate enddo rewind(fileUnit) phase = 0_pInt do while (trim(line) /= IO_EOF .and. IO_lc(IO_getTag(line,'<','>')) /= MATERIAL_partPhase) ! wind forward to 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 if (phase_plasticity(phase) == PLASTICITY_DISLOUCLA_ID) then Nchunks_SlipFamilies = count(lattice_NslipSystem(:,phase) > 0_pInt) Nchunks_SlipSlip = maxval(lattice_interactionSlipSlip(:,:,phase)) Nchunks_nonSchmid = lattice_NnonSchmid(phase) if(allocated(tempPerSlip)) deallocate(tempPerSlip) allocate(tempPerSlip(Nchunks_SlipFamilies)) endif cycle ! skip to next line endif if (phase > 0_pInt ) then; if (phase_plasticity(phase) == PLASTICITY_DISLOUCLA_ID) then ! do not short-circuit here (.and. with next if statemen). It's not safe in Fortran instance = phase_plasticityInstance(phase) ! which instance of my plasticity is present phase chunkPos = IO_stringPos(line) tag = IO_lc(IO_stringValue(line,chunkPos,1_pInt)) ! extract key select case(tag) !-------------------------------------------------------------------------------------------------- ! parameters depending on number of slip system families case ('nslip') if (chunkPos(1) < Nchunks_SlipFamilies + 1_pInt) & call IO_warning(50_pInt,ext_msg=trim(tag)//' ('//PLASTICITY_DISLOUCLA_label//')') if (chunkPos(1) > Nchunks_SlipFamilies + 1_pInt) & call IO_error(150_pInt,ext_msg=trim(tag)//' ('//PLASTICITY_DISLOUCLA_label//')') Nchunks_SlipFamilies = chunkPos(1) - 1_pInt do j = 1_pInt, Nchunks_SlipFamilies plastic_disloUCLA_Nslip(j,instance) = IO_intValue(line,chunkPos,1_pInt+j) enddo case ('rhoedge0','rhoedgedip0','slipburgers','qedge','v0','clambdaslip','tau_peierls','p_slip','q_slip',& 'kink_height','omega','kink_width','dislolength','friction_coeff') do j = 1_pInt, Nchunks_SlipFamilies tempPerSlip(j) = IO_floatValue(line,chunkPos,1_pInt+j) enddo select case(tag) case ('v0') plastic_disloUCLA_v0PerSlipFamily(1:Nchunks_SlipFamilies,instance) = tempPerSlip(1:Nchunks_SlipFamilies) case ('clambdaslip') plastic_disloUCLA_CLambdaSlipPerSlipFamily(1:Nchunks_SlipFamilies,instance) = tempPerSlip(1:Nchunks_SlipFamilies) case ('friction_coeff') plastic_disloUCLA_friction(1:Nchunks_SlipFamilies,instance) = & tempPerSlip(1:Nchunks_SlipFamilies) end select !-------------------------------------------------------------------------------------------------- ! parameters depending on number of interactions case ('interaction_slipslip','interactionslipslip') if (chunkPos(1) < 1_pInt + Nchunks_SlipSlip) & call IO_warning(52_pInt,ext_msg=trim(tag)//' ('//PLASTICITY_DISLOUCLA_label//')') do j = 1_pInt, Nchunks_SlipSlip plastic_disloUCLA_interaction_SlipSlip(j,instance) = IO_floatValue(line,chunkPos,1_pInt+j) enddo !-------------------------------------------------------------------------------------------------- ! parameters independent of number of slip systems case ('d0') plastic_disloUCLA_D0(instance) = IO_floatValue(line,chunkPos,2_pInt) case ('qsd') plastic_disloUCLA_Qsd(instance) = IO_floatValue(line,chunkPos,2_pInt) case ('solidsolutionstrength') plastic_disloUCLA_SolidSolutionStrength(instance) = IO_floatValue(line,chunkPos,2_pInt) case ('cedgedipmindistance') plastic_disloUCLA_CEdgeDipMinDistance(instance) = IO_floatValue(line,chunkPos,2_pInt) case ('catomicvolume') plastic_disloUCLA_CAtomicVolume(instance) = IO_floatValue(line,chunkPos,2_pInt) case ('dipoleformationfactor') plastic_disloUCLA_dipoleFormationFactor(instance) = IO_floatValue(line,chunkPos,2_pInt) end select endif; endif enddo parsingFile sanityChecks: do phase = 1_pInt, size(phase_plasticity) myPhase: if (phase_plasticity(phase) == PLASTICITY_disloUCLA_ID) then instance = phase_plasticityInstance(phase) if (sum(plastic_disloUCLA_Nslip(:,instance)) < 0_pInt) & call IO_error(211_pInt,el=instance,ext_msg='Nslip ('//PLASTICITY_DISLOUCLA_label//')') do f = 1_pInt,lattice_maxNslipFamily if (plastic_disloUCLA_Nslip(f,instance) > 0_pInt) then !if (plastic_disloUCLA_rhoEdge0(f,instance) < 0.0_pReal) & ! call IO_error(211_pInt,el=instance,ext_msg='rhoEdge0 ('//PLASTICITY_DISLOUCLA_label//')') !if (plastic_disloUCLA_rhoEdgeDip0(f,instance) < 0.0_pReal) & ! call IO_error(211_pInt,el=instance,ext_msg='rhoEdgeDip0 ('//PLASTICITY_DISLOUCLA_label//')') !if (plastic_disloUCLA_burgersPerSlipFamily(f,instance) <= 0.0_pReal) & ! call IO_error(211_pInt,el=instance,ext_msg='slipBurgers ('//PLASTICITY_DISLOUCLA_label//')') if (plastic_disloUCLA_v0PerSlipFamily(f,instance) <= 0.0_pReal) & call IO_error(211_pInt,el=instance,ext_msg='v0 ('//PLASTICITY_DISLOUCLA_label//')') !if (plastic_disloUCLA_tau_peierlsPerSlipFamily(f,instance) < 0.0_pReal) & ! call IO_error(211_pInt,el=instance,ext_msg='tau_peierls ('//PLASTICITY_DISLOUCLA_label//')') endif enddo if (plastic_disloUCLA_CAtomicVolume(instance) <= 0.0_pReal) & call IO_error(211_pInt,el=instance,ext_msg='cAtomicVolume ('//PLASTICITY_DISLOUCLA_label//')') if (plastic_disloUCLA_D0(instance) <= 0.0_pReal) & call IO_error(211_pInt,el=instance,ext_msg='D0 ('//PLASTICITY_DISLOUCLA_label//')') if (plastic_disloUCLA_Qsd(instance) <= 0.0_pReal) & call IO_error(211_pInt,el=instance,ext_msg='Qsd ('//PLASTICITY_DISLOUCLA_label//')') ! if (plastic_disloUCLA_aTolRho(instance) <= 0.0_pReal) & ! call IO_error(211_pInt,el=instance,ext_msg='aTolRho ('//PLASTICITY_DISLOUCLA_label//')') !-------------------------------------------------------------------------------------------------- ! Determine total number of active slip systems plastic_disloUCLA_Nslip(:,instance) = min(lattice_NslipSystem(:,phase),plastic_disloUCLA_Nslip(:,instance)) plastic_disloUCLA_totalNslip(instance) = sum(plastic_disloUCLA_Nslip(:,instance)) endif myPhase enddo sanityChecks !-------------------------------------------------------------------------------------------------- ! allocation of variables whose size depends on the total number of active slip systems maxTotalNslip = maxval(plastic_disloUCLA_totalNslip) allocate(plastic_disloUCLA_v0PerSlipSystem(maxTotalNslip, maxNinstance), source=0.0_pReal) allocate(plastic_disloUCLA_CLambdaSlipPerSlipSystem(maxTotalNslip, maxNinstance),source=0.0_pReal) allocate(plastic_disloUCLA_interactionMatrix_SlipSlip(maxval(plastic_disloUCLA_totalNslip),& ! slip resistance from slip activity maxval(plastic_disloUCLA_totalNslip),& maxNinstance), source=0.0_pReal) allocate(plastic_disloUCLA_forestProjectionEdge(maxTotalNslip,maxTotalNslip,maxNinstance), & source=0.0_pReal) initializeInstances: do phase = 1_pInt, size(phase_plasticity) myPhase2: if (phase_plasticity(phase) == PLASTICITY_disloUCLA_ID) then p = phase NofMyPhase=count(material_phase==phase) instance = phase_plasticityInstance(phase) ns = plastic_disloUCLA_totalNslip(instance) associate(prm => param(instance), stt=>state(instance),mse => microstructure(phase_plasticityInstance(p))) !-------------------------------------------------------------------------------------------------- ! allocate state arrays sizeDotState = int(size(['rhoEdge ','rhoEdgeDip ','accshearslip']),pInt) * ns sizeDeltaState = 0_pInt sizeState = sizeDotState & + int(size(['meanFreePathSlip ','tauSlipThreshold ']),pInt) * ns call material_allocatePlasticState(phase,NofMyPhase,sizeState,sizeDotState,0_pInt, & ns,0_pInt,0_pInt) plasticState(phase)%sizePostResults = plastic_disloUCLA_sizePostResults(instance) offset_slip = 2_pInt*plasticState(phase)%nSlip plasticState(phase)%slipRate => & plasticState(phase)%dotState(offset_slip+1:offset_slip+plasticState(phase)%nSlip,1:NofMyPhase) plasticState(phase)%accumulatedSlip => & plasticState(phase)%state (offset_slip+1:offset_slip+plasticState(phase)%nSlip,1:NofMyPhase) !* Process slip related parameters ------------------------------------------------ mySlipFamilies: do f = 1_pInt,lattice_maxNslipFamily index_myFamily = sum(plastic_disloUCLA_Nslip(1:f-1_pInt,instance)) ! index in truncated slip system list mySlipSystems: do j = 1_pInt,plastic_disloUCLA_Nslip(f,instance) plastic_disloUCLA_v0PerSlipSystem(index_myFamily+j,instance) = & plastic_disloUCLA_v0PerSlipFamily(f,instance) plastic_disloUCLA_CLambdaSlipPerSlipSystem(index_myFamily+j,instance) = & plastic_disloUCLA_CLambdaSlipPerSlipFamily(f,instance) !* Calculation of forest projections for edge dislocations !* Interaction matrices otherSlipFamilies: do o = 1_pInt,lattice_maxNslipFamily index_otherFamily = sum(plastic_disloUCLA_Nslip(1:o-1_pInt,instance)) otherSlipSystems: do k = 1_pInt,plastic_disloUCLA_Nslip(o,instance) plastic_disloUCLA_forestProjectionEdge(index_myFamily+j,index_otherFamily+k,instance) = & abs(math_mul3x3(lattice_sn(:,sum(lattice_NslipSystem(1:f-1,phase))+j,phase), & lattice_st(:,sum(lattice_NslipSystem(1:o-1,phase))+k,phase))) plastic_disloUCLA_interactionMatrix_SlipSlip(index_myFamily+j,index_otherFamily+k,instance) = & plastic_disloUCLA_interaction_SlipSlip(lattice_interactionSlipSlip( & sum(lattice_NslipSystem(1:f-1,phase))+j, & sum(lattice_NslipSystem(1:o-1,phase))+k, & phase), instance ) enddo otherSlipSystems; enddo otherSlipFamilies enddo mySlipSystems enddo mySlipFamilies startIndex=1_pInt endIndex=ns stt%rhoEdge=>plasticState(phase)%state(startIndex:endIndex,:) dotState(instance)%rhoEdge=>plasticState(phase)%dotState(startIndex:endIndex,:) plasticState(p)%aTolState(startIndex:endIndex) = prm%aTolRho startIndex=endIndex+1_pInt endIndex=endIndex+ns stt%rhoEdgeDip=>plasticState(phase)%state(startIndex:endIndex,:) dotState(instance)%rhoEdgeDip=>plasticState(phase)%dotState(startIndex:endIndex,:) plasticState(p)%aTolState(startIndex:endIndex) = prm%aTolRho startIndex=endIndex+1_pInt endIndex=endIndex+ns stt%accshear_slip=>plasticState(phase)%state(startIndex:endIndex,:) dotState(instance)%accshear_slip=>plasticState(phase)%dotState(startIndex:endIndex,:) plasticState(p)%aTolState(startIndex:endIndex) = 1e6_pReal startIndex=endIndex+1_pInt endIndex=endIndex+ns stt%mfp_slip=>plasticState(phase)%state(startIndex:endIndex,:) startIndex=endIndex+1_pInt endIndex=endIndex+ns stt%threshold_stress_slip=>plasticState(phase)%state(startIndex:endIndex,:) allocate(mse%mfp(prm%totalNslip,NofMyPhase),source=0.0_pReal) allocate(mse%threshold_stress(prm%totalNslip,NofMyPhase),source=0.0_pReal) call plastic_disloUCLA_stateInit(phase,instance) plasticState(p)%state0 = plasticState(p)%state ! ToDo: this could be done centrally end associate endif myPhase2 enddo initializeInstances end subroutine plastic_disloUCLA_init !-------------------------------------------------------------------------------------------------- !> @brief sets the relevant state values for a given instance of this plasticity !-------------------------------------------------------------------------------------------------- subroutine plastic_disloUCLA_stateInit(ph,instance) use math, only: & pi use lattice, only: & lattice_maxNslipFamily, & lattice_mu use material, only: & plasticState, & material_phase implicit none integer(pInt), intent(in) :: & instance, & !< number specifying the instance of the plasticity ph real(pReal), dimension(plasticState(ph)%sizeState) :: tempState integer(pInt) :: i,f,ns, index_myFamily real(pReal), dimension(plastic_disloUCLA_totalNslip(instance)) :: & invLambdaSlip0, & MeanFreePathSlip0, & tauSlipThreshold0 tempState = 0.0_pReal ns = plastic_disloUCLA_totalNslip(instance) associate(prm => param(instance)) tempState(1_pInt:ns) = prm%rho0 tempState(ns+1_pInt:2_pInt*ns) = prm%rhoDip0 !-------------------------------------------------------------------------------------------------- ! initialize dependent slip microstructural variables forall (i = 1_pInt:ns) & invLambdaSlip0(i) = sqrt(dot_product((prm%rho0+prm%rhoDip0),plastic_disloUCLA_forestProjectionEdge(1:ns,i,instance)))/ & plastic_disloUCLA_CLambdaSlipPerSlipSystem(i,instance) forall (i = 1_pInt:ns) & MeanFreePathSlip0(i) = & prm%grainSize/(1.0_pReal+invLambdaSlip0(i)*prm%grainSize) tempState(3_pInt*ns+1:4_pInt*ns) = MeanFreePathSlip0 forall (i = 1_pInt:ns) & tauSlipThreshold0(i) = & lattice_mu(ph)*prm%burgers(i) * & sqrt(dot_product((prm%rho0+prm%rhoDip0),plastic_disloUCLA_interactionMatrix_SlipSlip(i,1:ns,instance))) tempState(4_pInt*ns+1:5_pInt*ns) = tauSlipThreshold0 plasticState(ph)%state = spread(tempState,2,size(plasticState(ph)%state(1,:))) end associate end subroutine plastic_disloUCLA_stateInit !-------------------------------------------------------------------------------------------------- !> @brief calculates derived quantities from state !-------------------------------------------------------------------------------------------------- subroutine plastic_disloUCLA_microstructure(temperature,ipc,ip,el) use math, only: & pi use material, only: & phase_plasticityInstance, & phaseAt, phasememberAt, & material_phase use lattice, only: & lattice_mu implicit none integer(pInt), intent(in) :: & ipc, & !< component-ID of integration point ip, & !< integration point el !< element real(pReal), intent(in) :: & temperature !< temperature at IP integer(pInt) :: & instance, & ns,s, & ph, & of real(pReal), dimension(plastic_disloUCLA_totalNslip(phase_plasticityInstance(material_phase(ipc,ip,el)))) :: & invLambdaSlip !* Shortened notation of = phasememberAt(ipc,ip,el) ph = phaseAt(ipc,ip,el) instance = phase_plasticityInstance(ph) ns = plastic_disloUCLA_totalNslip(instance) associate(prm => param(instance), stt => state(instance)) !* 1/mean free distance between 2 forest dislocations seen by a moving dislocation forall (s = 1_pInt:ns) & invLambdaSlip(s) = & sqrt(dot_product((stt%rhoEdge(1_pInt:ns,of)+stt%rhoEdgeDip(1_pInt:ns,of)),& plastic_disloUCLA_forestProjectionEdge(1:ns,s,instance)))/ & plastic_disloUCLA_CLambdaSlipPerSlipSystem(s,instance) !* mean free path between 2 obstacles seen by a moving dislocation do s = 1_pInt,ns stt%mfp_slip(s,of) = & prm%grainSize/& (1.0_pReal+prm%grainSize*(invLambdaSlip(s))) enddo !* threshold stress for dislocation motion forall (s = 1_pInt:ns) & stt%threshold_stress_slip(s,of) = & lattice_mu(ph)*prm%burgers(s)*& sqrt(dot_product((stt%rhoEdge(1_pInt:ns,of)+stt%rhoEdgeDip(1_pInt:ns,of)),& plastic_disloUCLA_interactionMatrix_SlipSlip(s,1:ns,instance))) end associate end subroutine plastic_disloUCLA_microstructure !-------------------------------------------------------------------------------------------------- !> @brief calculates plastic velocity gradient and its tangent !-------------------------------------------------------------------------------------------------- subroutine plastic_disloUCLA_LpAndItsTangent(Lp,dLp_dMp,Mp,Temperature,ipc,ip,el) use material, only: & material_phase, & phase_plasticityInstance, & phaseAt, phasememberAt implicit none integer(pInt), intent(in) :: ipc,ip,el real(pReal), intent(in) :: Temperature real(pReal), dimension(3,3), intent(in) :: Mp real(pReal), dimension(3,3), intent(out) :: Lp real(pReal), dimension(3,3,3,3), intent(out) :: dLp_dMp integer(pInt) :: instance,ph,of,i,k,l,m,n real(pReal), dimension(plastic_disloUCLA_totalNslip(phase_plasticityInstance(material_phase(ipc,ip,el)))) :: & gdot_slip_pos,gdot_slip_neg,tau_slip_pos,tau_slip_neg,dgdot_dtauslip_pos,dgdot_dtauslip_neg !* Shortened notation of = phasememberAt(ipc,ip,el) ph = phaseAt(ipc,ip,el) instance = phase_plasticityInstance(ph) associate(prm => param(instance)) Lp = 0.0_pReal dLp_dMp = 0.0_pReal call kinetics(Mp,Temperature,ph,instance,of, & gdot_slip_pos,dgdot_dtauslip_pos,tau_slip_pos,gdot_slip_neg,dgdot_dtauslip_neg,tau_slip_neg) slipSystems: do i = 1_pInt, prm%totalNslip Lp = Lp + (gdot_slip_pos(i)+gdot_slip_neg(i))*prm%Schmid_slip(1:3,1:3,i) forall (k=1_pInt:3_pInt,l=1_pInt:3_pInt,m=1_pInt:3_pInt,n=1_pInt:3_pInt) & dLp_dMp(k,l,m,n) = dLp_dMp(k,l,m,n) & + dgdot_dtauslip_pos(i) * prm%Schmid_slip(k,l,i) * prm%nonSchmid_pos(m,n,i) & + dgdot_dtauslip_neg(i) * prm%Schmid_slip(k,l,i) * prm%nonSchmid_neg(m,n,i) enddo slipSystems end associate Lp = 0.5_pReal * Lp dLp_dMp = 0.5_pReal * dLp_dMp end subroutine plastic_disloUCLA_LpAndItsTangent !-------------------------------------------------------------------------------------------------- !> @brief calculates the rate of change of microstructure !-------------------------------------------------------------------------------------------------- subroutine plastic_disloUCLA_dotState(Mp,Temperature,ipc,ip,el) use prec, only: & tol_math_check, & dEq0 use math, only: & pi use material, only: & material_phase, & phase_plasticityInstance, & plasticState, & phaseAt, phasememberAt use lattice, only: & lattice_maxNslipFamily, & lattice_NslipSystem, & lattice_mu implicit none real(pReal), dimension(3,3), intent(in):: & Mp !< 2nd Piola Kirchhoff stress tensor in Mandel notation real(pReal), intent(in) :: & temperature !< temperature at integration point integer(pInt), intent(in) :: & ipc, & !< component-ID of integration point ip, & !< integration point el !< element integer(pInt) :: instance,ns,f,i,j,index_myFamily, & ph, & of real(pReal) :: & EdgeDipMinDistance,& AtomicVolume,& VacancyDiffusion,& DotRhoMultiplication,& EdgeDipDistance, & DotRhoEdgeDipAnnihilation, & DotRhoEdgeEdgeAnnihilation, & ClimbVelocity, & DotRhoEdgeDipClimb, & DotRhoDipFormation real(pReal), dimension(plastic_disloUCLA_totalNslip(phase_plasticityInstance(material_phase(ipc,ip,el)))) :: & gdot_slip_pos, gdot_slip_neg,& tau_slip_pos,& tau_slip_neg, & dgdot_dtauslip_neg,dgdot_dtauslip_pos !* Shortened notation of = phasememberAt(ipc,ip,el) ph = phaseAt(ipc,ip,el) instance = phase_plasticityInstance(ph) ns = plastic_disloUCLA_totalNslip(instance) plasticState(ph)%dotState(:,of) = 0.0_pReal associate(prm => param(instance), stt => state(instance)) !* Dislocation density evolution call kinetics(Mp,Temperature,ph,instance,of, & gdot_slip_pos,dgdot_dtauslip_pos,tau_slip_pos,gdot_slip_neg,dgdot_dtauslip_neg,tau_slip_neg) dotState(instance)%accshear_slip(:,of) = (gdot_slip_pos+gdot_slip_neg)*0.5_pReal j = 0_pInt slipFamilies: do f = 1_pInt,lattice_maxNslipFamily index_myFamily = sum(lattice_NslipSystem(1:f-1_pInt,ph)) ! at which index starts my family slipSystems: do i = 1_pInt,plastic_disloUCLA_Nslip(f,instance) j = j+1_pInt !* Multiplication DotRhoMultiplication = abs(dotState(instance)%accshear_slip(j,of))/& (prm%burgers(j)* & stt%mfp_slip(j,of)) !* Dipole formation EdgeDipMinDistance = & plastic_disloUCLA_CEdgeDipMinDistance(instance)*prm%burgers(j) if (dEq0(tau_slip_pos(j))) then DotRhoDipFormation = 0.0_pReal else EdgeDipDistance = & (3.0_pReal*lattice_mu(ph)*prm%burgers(j))/& (16.0_pReal*pi*abs(tau_slip_pos(j))) if (EdgeDipDistance>stt%mfp_slip(j,of)) EdgeDipDistance=stt%mfp_slip(j,of) if (EdgeDipDistance @brief return array of constitutive results !-------------------------------------------------------------------------------------------------- function plastic_disloUCLA_postResults(Mp,Temperature,ipc,ip,el) result(postResults) use prec, only: & tol_math_check, & dEq, dNeq0 use math, only: & pi, & math_mul33xx33 use material, only: & material_phase, & phase_plasticityInstance,& !plasticState, & phaseAt, phasememberAt use lattice, only: & lattice_Sslip, & lattice_maxNslipFamily, & lattice_NslipSystem, & lattice_mu implicit none real(pReal), dimension(3,3), intent(in) :: & Mp !< 2nd Piola Kirchhoff stress tensor in Mandel notation real(pReal), intent(in) :: & temperature !< temperature at integration point integer(pInt), intent(in) :: & ipc, & !< component-ID of integration point ip, & !< integration point el !< element real(pReal), dimension(plastic_disloUCLA_sizePostResults(phase_plasticityInstance(material_phase(ipc,ip,el)))) :: & postResults integer(pInt) :: & instance,& ns,& f,o,i,c,j,index_myFamily,& ph, & of real(pReal), dimension(plastic_disloUCLA_totalNslip(phase_plasticityInstance(material_phase(ipc,ip,el)))) :: & gdot_slip_pos,dgdot_dtauslip_pos,tau_slip_pos,gdot_slip_neg,dgdot_dtauslip_neg,tau_slip_neg !* Shortened notation of = phasememberAt(ipc,ip,el) ph = phaseAt(ipc,ip,el) instance = phase_plasticityInstance(ph) ns = plastic_disloUCLA_totalNslip(instance) !* Required output c = 0_pInt postResults = 0.0_pReal associate (prm => param(instance),stt =>state(instance)) do o = 1_pInt,plastic_disloUCLA_Noutput(instance) select case(plastic_disloUCLA_outputID(o,instance)) case (rho_ID) postResults(c+1_pInt:c+ns) = stt%rhoEdge(1_pInt:ns,of) c = c + ns case (rhoDip_ID) postResults(c+1_pInt:c+ns) = stt%rhoEdgeDip(1_pInt:ns,of) c = c + ns case (shearrate_ID,stressexponent_ID) call kinetics(Mp,Temperature,ph,instance,of, & gdot_slip_pos,dgdot_dtauslip_pos,tau_slip_pos,gdot_slip_neg,dgdot_dtauslip_neg,tau_slip_neg) if (plastic_disloUCLA_outputID(o,instance) == shearrate_ID) then postResults(c+1:c+ns) = (gdot_slip_pos + gdot_slip_neg)*0.5_pReal c = c + ns elseif(plastic_disloUCLA_outputID(o,instance) == stressexponent_ID) then do j = 1_pInt, ns if (dEq(gdot_slip_pos(j)+gdot_slip_neg(j),0.0_pReal)) then postResults(c+j) = 0.0_pReal else postResults(c+j) = (tau_slip_pos(j)+tau_slip_neg(j))/& (gdot_slip_pos(j)+gdot_slip_neg(j))*& (dgdot_dtauslip_pos(j)+dgdot_dtauslip_neg(j))* 0.5_pReal endif enddo c = c + ns endif case (accumulatedshear_ID) postResults(c+1_pInt:c+ns) = & stt%accshear_slip(1_pInt:ns, of) c = c + ns case (mfp_ID) postResults(c+1_pInt:c+ns) =& stt%mfp_slip(1_pInt:ns, of) c = c + ns case (resolvedstress_ID) j = 0_pInt slipFamilies1: do f = 1_pInt,lattice_maxNslipFamily index_myFamily = sum(lattice_NslipSystem(1:f-1_pInt,ph)) ! at which index starts my family slipSystems1: do i = 1_pInt,plastic_disloUCLA_Nslip(f,instance) j = j + 1_pInt postResults(c+j) =& math_mul33xx33(Mp,lattice_Sslip(:,:,1,index_myFamily+i,ph)) enddo slipSystems1; enddo slipFamilies1 c = c + ns case (thresholdstress_ID) postResults(c+1_pInt:c+ns) = & stt%threshold_stress_slip(1_pInt:ns,of) c = c + ns case (dipoleDistance_ID) j = 0_pInt slipFamilies2: do f = 1_pInt,lattice_maxNslipFamily index_myFamily = sum(lattice_NslipSystem(1:f-1_pInt,ph)) ! at which index starts my family slipSystems2: do i = 1_pInt,plastic_disloUCLA_Nslip(f,instance) j = j + 1_pInt if (dNeq0(abs(math_mul33xx33(Mp,lattice_Sslip(:,:,1,index_myFamily+i,ph))))) then postResults(c+j) = & (3.0_pReal*lattice_mu(ph)*prm%burgers(j))/& (16.0_pReal*pi*abs(math_mul33xx33(Mp,lattice_Sslip(:,:,1,index_myFamily+i,ph)))) else postResults(c+j) = huge(1.0_pReal) endif postResults(c+j)=min(postResults(c+j),& stt%mfp_slip(j,of)) enddo slipSystems2; enddo slipFamilies2 c = c + ns end select enddo end associate end function plastic_disloUCLA_postResults !-------------------------------------------------------------------------------------------------- !> @brief return array of constitutive results !-------------------------------------------------------------------------------------------------- subroutine kinetics(Mp,Temperature,ph,instance,of, & gdot_slip_pos,dgdot_dtauslip_pos,tau_slip_pos,gdot_slip_neg,dgdot_dtauslip_neg,tau_slip_neg) use prec, only: & tol_math_check, & dEq, dNeq0 use math, only: & pi, & math_mul33xx33 use material, only: & material_phase, & phase_plasticityInstance,& !plasticState, & phaseAt, phasememberAt use lattice, only: & lattice_Sslip, & lattice_maxNslipFamily, & lattice_NslipSystem, & lattice_NnonSchmid implicit none real(pReal), dimension(3,3), intent(in) :: & Mp !< 2nd Piola Kirchhoff stress tensor in Mandel notation real(pReal), intent(in) :: & temperature !< temperature at integration point integer(pInt), intent(in) :: & ph, instance,of integer(pInt) :: & ns,& f,i,j,k,index_myFamily real(pReal) :: StressRatio_p,StressRatio_pminus1,& BoltzmannRatio,DotGamma0,stressRatio,& dvel_slip, vel_slip real(pReal), intent(out), dimension(plastic_disloUCLA_totalNslip(instance)) :: & gdot_slip_pos,dgdot_dtauslip_pos,tau_slip_pos,gdot_slip_neg,dgdot_dtauslip_neg,tau_slip_neg associate(prm => param(instance), stt => state(instance)) !* Shortened notation ns = plastic_disloUCLA_totalNslip(instance) gdot_slip_pos = 0.0_pReal gdot_slip_neg = 0.0_pReal dgdot_dtauslip_pos = 0.0_pReal dgdot_dtauslip_neg = 0.0_pReal j = 0_pInt slipFamilies: do f = 1_pInt,lattice_maxNslipFamily index_myFamily = sum(lattice_NslipSystem(1:f-1_pInt,ph)) ! at which index starts my family slipSystems: do i = 1_pInt,plastic_disloUCLA_Nslip(f,instance) j = j + 1_pInt !* Boltzmann ratio BoltzmannRatio = prm%H0kp(j)/(kB*Temperature) !* Initial shear rates DotGamma0 = & stt%rhoEdge(j,of)*prm%burgers(j)*& plastic_disloUCLA_v0PerSlipSystem(j,instance) !* Resolved shear stress on slip system tau_slip_pos(j) = math_mul33xx33(Mp,prm%nonSchmid_pos(1:3,1:3,j)) tau_slip_neg(j) = math_mul33xx33(Mp,prm%nonSchmid_neg(1:3,1:3,j)) significantPositiveTau: if((abs(tau_slip_pos(j))-stt%threshold_stress_slip(j, of)) > tol_math_check) then !* Stress ratio stressRatio = ((abs(tau_slip_pos(j))-stt%threshold_stress_slip(j, of))/& (plastic_disloUCLA_SolidSolutionStrength(instance)+& prm%tau_Peierls(j))) stressRatio_p = stressRatio** prm%p(j) stressRatio_pminus1 = stressRatio**(prm%p(j)-1.0_pReal) !* Shear rates due to slip vel_slip = 2.0_pReal*prm%burgers(j) & * prm%kink_height(j) * prm%omega(j) & * ( stt%mfp_slip(j,of) - prm%kink_width(j) ) & * (tau_slip_pos(j) & * exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)) ) & / ( & 2.0_pReal*(prm%burgers(j)**2.0_pReal)*tau_slip_pos(j) & + prm%omega(j) * plastic_disloUCLA_friction(f,instance) & *(( stt%mfp_slip(j,of) - prm%kink_width(j) )**2.0_pReal) & * exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)) & ) gdot_slip_pos(j) = DotGamma0 & * vel_slip & * sign(1.0_pReal,tau_slip_pos(j)) !* Derivatives of shear rates dvel_slip = & 2.0_pReal*prm%burgers(j) & * prm%kink_height(j) * prm%omega(j) & * ( stt%mfp_slip(j,of) - prm%kink_width(j) ) & * ( & (exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)) & + tau_slip_pos(j) & * (abs(exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)))& !deltaf(i) *BoltzmannRatio*prm%p(j)& *prm%q(j)/& (plastic_disloUCLA_SolidSolutionStrength(instance)+prm%tau_Peierls(j))*& StressRatio_pminus1*(1-StressRatio_p)**(prm%q(j)-1.0_pReal) ) &!deltaf(f) ) & * (2.0_pReal*(prm%burgers(j)**2.0_pReal)*tau_slip_pos(j) & + prm%omega(j) * plastic_disloUCLA_friction(f,instance) & *(( stt%mfp_slip(j,of) - prm%kink_width(j) )**2.0_pReal) & * exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)) & ) & - (tau_slip_pos(j) & * exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)) ) & * (2.0_pReal*(prm%burgers(j)**2.0_pReal) & + prm%omega(j) * plastic_disloUCLA_friction(f,instance) & *(( stt%mfp_slip(j,of) - prm%kink_width(j) )**2.0_pReal) & * (abs(exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)))& !deltaf(i) *BoltzmannRatio*prm%p(j)& *prm%q(j)/& (plastic_disloUCLA_SolidSolutionStrength(instance)+prm%tau_Peierls(j))*& StressRatio_pminus1*(1-StressRatio_p)**(prm%q(j)-1.0_pReal) )& !deltaf(f) ) & ) & / ( & ( & 2.0_pReal*(prm%burgers(j)**2.0_pReal)*tau_slip_pos(j) & + prm%omega(j) * plastic_disloUCLA_friction(f,instance) & *(( stt%mfp_slip(j,of) - prm%kink_width(j) )**2.0_pReal) & * exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)) & )**2.0_pReal & ) dgdot_dtauslip_pos(j) = DotGamma0 * dvel_slip endif significantPositiveTau significantNegativeTau: if((abs(tau_slip_neg(j))-stt%threshold_stress_slip(j, of)) > tol_math_check) then !* Stress ratios stressRatio = ((abs(tau_slip_neg(j))-stt%threshold_stress_slip(j, of))/& (plastic_disloUCLA_SolidSolutionStrength(instance)+& prm%tau_Peierls(j))) stressRatio_p = stressRatio** prm%p(j) stressRatio_pminus1 = stressRatio**(prm%p(j)-1.0_pReal) !* Shear rates due to slip vel_slip = 2.0_pReal*prm%burgers(j) & * prm%kink_height(j) * prm%omega(j) & * ( stt%mfp_slip(j,of) - prm%kink_width(j) ) & * (tau_slip_neg(j) & * exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)) ) & / ( & 2.0_pReal*(prm%burgers(j)**2.0_pReal)*tau_slip_neg(j) & + prm%omega(j) * plastic_disloUCLA_friction(f,instance) & *(( stt%mfp_slip(j,of) - prm%kink_width(j) )**2.0_pReal) & * exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)) & ) gdot_slip_neg(j) = DotGamma0 & * vel_slip & * sign(1.0_pReal,tau_slip_neg(j)) !* Derivatives of shear rates dvel_slip = & 2.0_pReal*prm%burgers(j) & * prm%kink_height(j) * prm%omega(j) & * ( stt%mfp_slip(j,of) - prm%kink_width(j) ) & * ( & (exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)) & + tau_slip_neg(j) & * (abs(exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)))& !deltaf(i) *BoltzmannRatio*prm%p(j)& *prm%q(j)/& (plastic_disloUCLA_SolidSolutionStrength(instance)+prm%tau_Peierls(j))*& StressRatio_pminus1*(1-StressRatio_p)**(prm%q(j)-1.0_pReal) ) &!deltaf(f) ) & * (2.0_pReal*(prm%burgers(j)**2.0_pReal)*tau_slip_neg(j) & + prm%omega(j) * plastic_disloUCLA_friction(f,instance) & *(( stt%mfp_slip(j,of) - prm%kink_width(j) )**2.0_pReal) & * exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)) & ) & - (tau_slip_neg(j) & * exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)) ) & * (2.0_pReal*(prm%burgers(j)**2.0_pReal) & + prm%omega(j) * plastic_disloUCLA_friction(f,instance) & *(( stt%mfp_slip(j,of) - prm%kink_width(j) )**2.0_pReal) & * (abs(exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)))& !deltaf(i) *BoltzmannRatio*prm%p(j)& *prm%q(j)/& (plastic_disloUCLA_SolidSolutionStrength(instance)+prm%tau_Peierls(j))*& StressRatio_pminus1*(1-StressRatio_p)**(prm%q(j)-1.0_pReal) )& !deltaf(f) ) & ) & / ( & ( & 2.0_pReal*(prm%burgers(j)**2.0_pReal)*tau_slip_neg(j) & + prm%omega(j) * plastic_disloUCLA_friction(f,instance) & *(( stt%mfp_slip(j,of) - prm%kink_width(j) )**2.0_pReal) & * exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q(j)) & )**2.0_pReal & ) dgdot_dtauslip_neg(j) = DotGamma0 * dvel_slip endif significantNegativeTau enddo slipSystems enddo slipFamilies end associate end subroutine kinetics end module plastic_disloUCLA