537 lines
25 KiB
Fortran
537 lines
25 KiB
Fortran
!--------------------------------------------------------------------------------------------------
|
||
!> @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 crystal plasticity model for bcc metals, especially Tungsten
|
||
!--------------------------------------------------------------------------------------------------
|
||
submodule(phase:plastic) dislotungsten
|
||
|
||
real(pReal), parameter :: &
|
||
kB = 1.38e-23_pReal !< Boltzmann constant in J/Kelvin
|
||
|
||
type :: tParameters
|
||
real(pReal) :: &
|
||
D = 1.0_pReal, & !< grain size
|
||
mu = 1.0_pReal, & !< equivalent shear modulus
|
||
D_0 = 1.0_pReal, & !< prefactor for self-diffusion coefficient
|
||
Q_cl = 1.0_pReal !< activation energy for dislocation climb
|
||
real(pReal), allocatable, dimension(:) :: &
|
||
b_sl, & !< magnitude of Burgers vector [m]
|
||
d_caron, & !< distance of spontaneous annhihilation
|
||
i_sl, & !< Adj. parameter for distance between 2 forest dislocations
|
||
f_at, & !< factor to calculate atomic volume
|
||
tau_Peierls, & !< Peierls stress
|
||
!* mobility law parameters
|
||
Q_s, & !< activation energy for glide [J]
|
||
v_0, & !< dislocation velocity prefactor [m/s]
|
||
p, & !< p-exponent in glide velocity
|
||
q, & !< q-exponent in glide velocity
|
||
B, & !< friction coefficient
|
||
h, & !< height of the kink pair
|
||
w, & !< width of the kink pair
|
||
omega !< attempt frequency for kink pair nucleation
|
||
real(pReal), allocatable, dimension(:,:) :: &
|
||
h_sl_sl, & !< slip resistance from slip activity
|
||
forestProjection
|
||
real(pReal), allocatable, dimension(:,:,:) :: &
|
||
P_sl, &
|
||
P_nS_pos, &
|
||
P_nS_neg
|
||
integer :: &
|
||
sum_N_sl !< total number of active slip system
|
||
character(len=pStringLen), allocatable, dimension(:) :: &
|
||
output
|
||
logical :: &
|
||
dipoleFormation !< flag indicating consideration of dipole formation
|
||
end type !< container type for internal constitutive parameters
|
||
|
||
type :: tDisloTungstenState
|
||
real(pReal), dimension(:,:), pointer :: &
|
||
rho_mob, &
|
||
rho_dip, &
|
||
gamma_sl
|
||
end type tDisloTungstenState
|
||
|
||
type :: tDisloTungstendependentState
|
||
real(pReal), dimension(:,:), allocatable :: &
|
||
Lambda_sl, &
|
||
tau_pass
|
||
end type tDisloTungstendependentState
|
||
|
||
!--------------------------------------------------------------------------------------------------
|
||
! containers for parameters and state
|
||
type(tParameters), allocatable, dimension(:) :: param
|
||
type(tDisloTungstenState), allocatable, dimension(:) :: &
|
||
dotState, &
|
||
state
|
||
type(tDisloTungstendependentState), allocatable, dimension(:) :: dependentState
|
||
|
||
contains
|
||
|
||
|
||
!--------------------------------------------------------------------------------------------------
|
||
!> @brief Perform module initialization.
|
||
!> @details reads in material parameters, allocates arrays, and does sanity checks
|
||
!--------------------------------------------------------------------------------------------------
|
||
module function plastic_dislotungsten_init() result(myPlasticity)
|
||
|
||
logical, dimension(:), allocatable :: myPlasticity
|
||
integer :: &
|
||
ph, i, &
|
||
Nmembers, &
|
||
sizeState, sizeDotState, &
|
||
startIndex, endIndex
|
||
integer, dimension(:), allocatable :: &
|
||
N_sl
|
||
real(pReal),dimension(:), allocatable :: &
|
||
rho_mob_0, & !< initial dislocation density
|
||
rho_dip_0, & !< initial dipole density
|
||
a !< non-Schmid coefficients
|
||
character(len=pStringLen) :: &
|
||
extmsg = ''
|
||
class(tNode), pointer :: &
|
||
phases, &
|
||
phase, &
|
||
mech, &
|
||
pl
|
||
|
||
|
||
myPlasticity = plastic_active('dislotungsten')
|
||
if(count(myPlasticity) == 0) return
|
||
|
||
print'(/,a)', ' <<<+- phase:mechanical:plastic:dislotungsten init -+>>>'
|
||
print'(a,i0)', ' # phases: ',count(myPlasticity); flush(IO_STDOUT)
|
||
|
||
print*, 'D. Cereceda et al., International Journal of Plasticity 78:242–256, 2016'
|
||
print*, 'https://doi.org/10.1016/j.ijplas.2015.09.002'
|
||
|
||
|
||
phases => config_material%get('phase')
|
||
allocate(param(phases%length))
|
||
allocate(state(phases%length))
|
||
allocate(dotState(phases%length))
|
||
allocate(dependentState(phases%length))
|
||
|
||
|
||
do ph = 1, phases%length
|
||
if(.not. myPlasticity(ph)) cycle
|
||
|
||
associate(prm => param(ph), dot => dotState(ph), stt => state(ph), dst => dependentState(ph))
|
||
|
||
phase => phases%get(ph)
|
||
mech => phase%get('mechanical')
|
||
pl => mech%get('plastic')
|
||
|
||
#if defined (__GFORTRAN__)
|
||
prm%output = output_as1dString(pl)
|
||
#else
|
||
prm%output = pl%get_as1dString('output',defaultVal=emptyStringArray)
|
||
#endif
|
||
|
||
prm%mu = elastic_mu(ph)
|
||
|
||
!--------------------------------------------------------------------------------------------------
|
||
! slip related parameters
|
||
N_sl = pl%get_as1dInt('N_sl',defaultVal=emptyIntArray)
|
||
prm%sum_N_sl = sum(abs(N_sl))
|
||
slipActive: if (prm%sum_N_sl > 0) then
|
||
prm%P_sl = lattice_SchmidMatrix_slip(N_sl,phase_lattice(ph),phase_cOverA(ph))
|
||
|
||
if (phase_lattice(ph) == 'cI') then
|
||
a = pl%get_as1dFloat('a_nonSchmid',defaultVal = emptyRealArray)
|
||
prm%P_nS_pos = lattice_nonSchmidMatrix(N_sl,a,+1)
|
||
prm%P_nS_neg = lattice_nonSchmidMatrix(N_sl,a,-1)
|
||
else
|
||
prm%P_nS_pos = prm%P_sl
|
||
prm%P_nS_neg = prm%P_sl
|
||
endif
|
||
|
||
prm%h_sl_sl = lattice_interaction_SlipBySlip(N_sl,pl%get_as1dFloat('h_sl-sl'), &
|
||
phase_lattice(ph))
|
||
prm%forestProjection = lattice_forestProjection_edge(N_sl,phase_lattice(ph),&
|
||
phase_cOverA(ph))
|
||
prm%forestProjection = transpose(prm%forestProjection)
|
||
|
||
rho_mob_0 = pl%get_as1dFloat('rho_mob_0', requiredSize=size(N_sl))
|
||
rho_dip_0 = pl%get_as1dFloat('rho_dip_0', requiredSize=size(N_sl))
|
||
prm%v_0 = pl%get_as1dFloat('v_0', requiredSize=size(N_sl))
|
||
prm%b_sl = pl%get_as1dFloat('b_sl', requiredSize=size(N_sl))
|
||
prm%Q_s = pl%get_as1dFloat('Q_s', requiredSize=size(N_sl))
|
||
|
||
prm%i_sl = pl%get_as1dFloat('i_sl', requiredSize=size(N_sl))
|
||
prm%tau_Peierls = pl%get_as1dFloat('tau_Peierls', requiredSize=size(N_sl))
|
||
prm%p = pl%get_as1dFloat('p_sl', requiredSize=size(N_sl))
|
||
prm%q = pl%get_as1dFloat('q_sl', requiredSize=size(N_sl))
|
||
prm%h = pl%get_as1dFloat('h', requiredSize=size(N_sl))
|
||
prm%w = pl%get_as1dFloat('w', requiredSize=size(N_sl))
|
||
prm%omega = pl%get_as1dFloat('omega', requiredSize=size(N_sl))
|
||
prm%B = pl%get_as1dFloat('B', requiredSize=size(N_sl))
|
||
|
||
prm%D = pl%get_asFloat('D')
|
||
prm%D_0 = pl%get_asFloat('D_0')
|
||
prm%Q_cl = pl%get_asFloat('Q_cl')
|
||
prm%f_at = pl%get_asFloat('f_at') * prm%b_sl**3.0_pReal
|
||
|
||
prm%dipoleformation = .not. pl%get_asBool('no_dipole_formation', defaultVal = .false.)
|
||
|
||
! expand: family => system
|
||
rho_mob_0 = math_expand(rho_mob_0, N_sl)
|
||
rho_dip_0 = math_expand(rho_dip_0, N_sl)
|
||
prm%q = math_expand(prm%q, N_sl)
|
||
prm%p = math_expand(prm%p, N_sl)
|
||
prm%Q_s = math_expand(prm%Q_s, N_sl)
|
||
prm%b_sl = math_expand(prm%b_sl, N_sl)
|
||
prm%h = math_expand(prm%h, N_sl)
|
||
prm%w = math_expand(prm%w, N_sl)
|
||
prm%omega = math_expand(prm%omega, N_sl)
|
||
prm%tau_Peierls = math_expand(prm%tau_Peierls, N_sl)
|
||
prm%v_0 = math_expand(prm%v_0, N_sl)
|
||
prm%B = math_expand(prm%B, N_sl)
|
||
prm%i_sl = math_expand(prm%i_sl, N_sl)
|
||
prm%f_at = math_expand(prm%f_at, N_sl)
|
||
prm%d_caron = pl%get_asFloat('D_a') * prm%b_sl
|
||
|
||
! sanity checks
|
||
if ( prm%D_0 <= 0.0_pReal) extmsg = trim(extmsg)//' D_0'
|
||
if ( prm%Q_cl <= 0.0_pReal) extmsg = trim(extmsg)//' Q_cl'
|
||
if (any(rho_mob_0 < 0.0_pReal)) extmsg = trim(extmsg)//' rho_mob_0'
|
||
if (any(rho_dip_0 < 0.0_pReal)) extmsg = trim(extmsg)//' rho_dip_0'
|
||
if (any(prm%v_0 < 0.0_pReal)) extmsg = trim(extmsg)//' v_0'
|
||
if (any(prm%b_sl <= 0.0_pReal)) extmsg = trim(extmsg)//' b_sl'
|
||
if (any(prm%Q_s <= 0.0_pReal)) extmsg = trim(extmsg)//' Q_s'
|
||
if (any(prm%tau_Peierls < 0.0_pReal)) extmsg = trim(extmsg)//' tau_Peierls'
|
||
if (any(prm%B < 0.0_pReal)) extmsg = trim(extmsg)//' B'
|
||
if (any(prm%d_caron < 0.0_pReal)) extmsg = trim(extmsg)//' d_caron(D_a,b_sl)'
|
||
if (any(prm%f_at <= 0.0_pReal)) extmsg = trim(extmsg)//' f_at or b_sl'
|
||
|
||
else slipActive
|
||
rho_mob_0= emptyRealArray; rho_dip_0 = emptyRealArray
|
||
allocate(prm%b_sl,prm%d_caron,prm%i_sl,prm%f_at,prm%tau_Peierls, &
|
||
prm%Q_s,prm%v_0,prm%p,prm%q,prm%B,prm%h,prm%w,prm%omega, &
|
||
source = emptyRealArray)
|
||
allocate(prm%forestProjection(0,0))
|
||
allocate(prm%h_sl_sl (0,0))
|
||
endif slipActive
|
||
|
||
!--------------------------------------------------------------------------------------------------
|
||
! allocate state arrays
|
||
Nmembers = count(material_phaseID == ph)
|
||
sizeDotState = size(['rho_mob ','rho_dip ','gamma_sl']) * prm%sum_N_sl
|
||
sizeState = sizeDotState
|
||
|
||
call phase_allocateState(plasticState(ph),Nmembers,sizeState,sizeDotState,0)
|
||
|
||
!--------------------------------------------------------------------------------------------------
|
||
! state aliases and initialization
|
||
startIndex = 1
|
||
endIndex = prm%sum_N_sl
|
||
stt%rho_mob => plasticState(ph)%state(startIndex:endIndex,:)
|
||
stt%rho_mob = spread(rho_mob_0,2,Nmembers)
|
||
dot%rho_mob => plasticState(ph)%dotState(startIndex:endIndex,:)
|
||
plasticState(ph)%atol(startIndex:endIndex) = pl%get_asFloat('atol_rho',defaultVal=1.0_pReal)
|
||
if (any(plasticState(ph)%atol(startIndex:endIndex) < 0.0_pReal)) extmsg = trim(extmsg)//' atol_rho'
|
||
|
||
startIndex = endIndex + 1
|
||
endIndex = endIndex + prm%sum_N_sl
|
||
stt%rho_dip => plasticState(ph)%state(startIndex:endIndex,:)
|
||
stt%rho_dip = spread(rho_dip_0,2,Nmembers)
|
||
dot%rho_dip => plasticState(ph)%dotState(startIndex:endIndex,:)
|
||
plasticState(ph)%atol(startIndex:endIndex) = pl%get_asFloat('atol_rho',defaultVal=1.0_pReal)
|
||
|
||
startIndex = endIndex + 1
|
||
endIndex = endIndex + prm%sum_N_sl
|
||
stt%gamma_sl => plasticState(ph)%state(startIndex:endIndex,:)
|
||
dot%gamma_sl => plasticState(ph)%dotState(startIndex:endIndex,:)
|
||
plasticState(ph)%atol(startIndex:endIndex) = pl%get_asFloat('atol_gamma',defaultVal=1.0e-6_pReal)
|
||
if(any(plasticState(ph)%atol(startIndex:endIndex) < 0.0_pReal)) extmsg = trim(extmsg)//' atol_gamma'
|
||
|
||
allocate(dst%Lambda_sl(prm%sum_N_sl,Nmembers), source=0.0_pReal)
|
||
allocate(dst%tau_pass(prm%sum_N_sl,Nmembers), source=0.0_pReal)
|
||
|
||
end associate
|
||
|
||
!--------------------------------------------------------------------------------------------------
|
||
! exit if any parameter is out of range
|
||
if (extmsg /= '') call IO_error(211,ext_msg=trim(extmsg)//'(dislotungsten)')
|
||
|
||
enddo
|
||
|
||
end function plastic_dislotungsten_init
|
||
|
||
|
||
!--------------------------------------------------------------------------------------------------
|
||
!> @brief Calculate plastic velocity gradient and its tangent.
|
||
!--------------------------------------------------------------------------------------------------
|
||
pure module subroutine dislotungsten_LpAndItsTangent(Lp,dLp_dMp, &
|
||
Mp,T,ph,en)
|
||
real(pReal), dimension(3,3), intent(out) :: &
|
||
Lp !< plastic velocity gradient
|
||
real(pReal), dimension(3,3,3,3), intent(out) :: &
|
||
dLp_dMp !< derivative of Lp with respect to the Mandel stress
|
||
|
||
real(pReal), dimension(3,3), intent(in) :: &
|
||
Mp !< Mandel stress
|
||
real(pReal), intent(in) :: &
|
||
T !< temperature
|
||
integer, intent(in) :: &
|
||
ph, &
|
||
en
|
||
|
||
integer :: &
|
||
i,k,l,m,n
|
||
real(pReal), dimension(param(ph)%sum_N_sl) :: &
|
||
dot_gamma_pos,dot_gamma_neg, &
|
||
ddot_gamma_dtau_pos,ddot_gamma_dtau_neg
|
||
|
||
Lp = 0.0_pReal
|
||
dLp_dMp = 0.0_pReal
|
||
|
||
associate(prm => param(ph))
|
||
|
||
call kinetics(Mp,T,ph,en,dot_gamma_pos,dot_gamma_neg,ddot_gamma_dtau_pos,ddot_gamma_dtau_neg)
|
||
do i = 1, prm%sum_N_sl
|
||
Lp = Lp + (dot_gamma_pos(i)+dot_gamma_neg(i))*prm%P_sl(1:3,1:3,i)
|
||
forall (k=1:3,l=1:3,m=1:3,n=1:3) &
|
||
dLp_dMp(k,l,m,n) = dLp_dMp(k,l,m,n) &
|
||
+ ddot_gamma_dtau_pos(i) * prm%P_sl(k,l,i) * prm%P_nS_pos(m,n,i) &
|
||
+ ddot_gamma_dtau_neg(i) * prm%P_sl(k,l,i) * prm%P_nS_neg(m,n,i)
|
||
enddo
|
||
|
||
end associate
|
||
|
||
end subroutine dislotungsten_LpAndItsTangent
|
||
|
||
|
||
!--------------------------------------------------------------------------------------------------
|
||
!> @brief Calculate the rate of change of microstructure.
|
||
!--------------------------------------------------------------------------------------------------
|
||
module subroutine dislotungsten_dotState(Mp,T,ph,en)
|
||
|
||
real(pReal), dimension(3,3), intent(in) :: &
|
||
Mp !< Mandel stress
|
||
real(pReal), intent(in) :: &
|
||
T !< temperature
|
||
integer, intent(in) :: &
|
||
ph, &
|
||
en
|
||
|
||
real(pReal), dimension(param(ph)%sum_N_sl) :: &
|
||
dot_gamma_pos, dot_gamma_neg,&
|
||
tau_pos,&
|
||
tau_neg, &
|
||
v_cl, &
|
||
dot_rho_dip_formation, &
|
||
dot_rho_dip_climb, &
|
||
d_hat
|
||
|
||
associate(prm => param(ph), stt => state(ph), dot => dotState(ph), dst => dependentState(ph))
|
||
|
||
call kinetics(Mp,T,ph,en,&
|
||
dot_gamma_pos,dot_gamma_neg, &
|
||
tau_pos_out = tau_pos,tau_neg_out = tau_neg)
|
||
|
||
dot%gamma_sl(:,en) = abs(dot_gamma_pos+dot_gamma_neg)
|
||
|
||
where(dEq0(tau_pos)) ! ToDo: use avg of +/-
|
||
dot_rho_dip_formation = 0.0_pReal
|
||
dot_rho_dip_climb = 0.0_pReal
|
||
else where
|
||
d_hat = math_clip(3.0_pReal*prm%mu*prm%b_sl/(16.0_pReal*PI*abs(tau_pos)), & ! ToDo: use avg of +/-
|
||
prm%d_caron, & ! lower limit
|
||
dst%Lambda_sl(:,en)) ! upper limit
|
||
dot_rho_dip_formation = merge(2.0_pReal*(d_hat-prm%d_caron)*stt%rho_mob(:,en)*dot%gamma_sl(:,en)/prm%b_sl, &
|
||
0.0_pReal, &
|
||
prm%dipoleformation)
|
||
v_cl = (3.0_pReal*prm%mu*prm%D_0*exp(-prm%Q_cl/(kB*T))*prm%f_at/(2.0_pReal*PI*kB*T)) &
|
||
* (1.0_pReal/(d_hat+prm%d_caron))
|
||
dot_rho_dip_climb = (4.0_pReal*v_cl*stt%rho_dip(:,en))/(d_hat-prm%d_caron) ! ToDo: Discuss with Franz: Stress dependency?
|
||
end where
|
||
|
||
dot%rho_mob(:,en) = dot%gamma_sl(:,en)/(prm%b_sl*dst%Lambda_sl(:,en)) & ! multiplication
|
||
- dot_rho_dip_formation &
|
||
- (2.0_pReal*prm%d_caron)/prm%b_sl*stt%rho_mob(:,en)*dot%gamma_sl(:,en) ! Spontaneous annihilation of 2 edges
|
||
dot%rho_dip(:,en) = dot_rho_dip_formation &
|
||
- (2.0_pReal*prm%d_caron)/prm%b_sl*stt%rho_dip(:,en)*dot%gamma_sl(:,en) & ! Spontaneous annihilation of an edge with a dipole
|
||
- dot_rho_dip_climb
|
||
|
||
end associate
|
||
|
||
end subroutine dislotungsten_dotState
|
||
|
||
|
||
!--------------------------------------------------------------------------------------------------
|
||
!> @brief Calculate derived quantities from state.
|
||
!--------------------------------------------------------------------------------------------------
|
||
module subroutine dislotungsten_dependentState(ph,en)
|
||
|
||
integer, intent(in) :: &
|
||
ph, &
|
||
en
|
||
|
||
real(pReal), dimension(param(ph)%sum_N_sl) :: &
|
||
dislocationSpacing
|
||
|
||
|
||
associate(prm => param(ph), stt => state(ph), dst => dependentState(ph))
|
||
|
||
dislocationSpacing = sqrt(matmul(prm%forestProjection,stt%rho_mob(:,en)+stt%rho_dip(:,en)))
|
||
dst%tau_pass(:,en) = prm%mu*prm%b_sl &
|
||
* sqrt(matmul(prm%h_sl_sl,stt%rho_mob(:,en)+stt%rho_dip(:,en)))
|
||
|
||
dst%Lambda_sl(:,en) = prm%D/(1.0_pReal+prm%D*dislocationSpacing/prm%i_sl)
|
||
|
||
end associate
|
||
|
||
end subroutine dislotungsten_dependentState
|
||
|
||
|
||
!--------------------------------------------------------------------------------------------------
|
||
!> @brief Write results to HDF5 output file.
|
||
!--------------------------------------------------------------------------------------------------
|
||
module subroutine plastic_dislotungsten_results(ph,group)
|
||
|
||
integer, intent(in) :: ph
|
||
character(len=*), intent(in) :: group
|
||
|
||
integer :: o
|
||
|
||
associate(prm => param(ph), stt => state(ph), dst => dependentState(ph))
|
||
outputsLoop: do o = 1,size(prm%output)
|
||
select case(trim(prm%output(o)))
|
||
case('rho_mob')
|
||
if(prm%sum_N_sl>0) call results_writeDataset(stt%rho_mob,group,trim(prm%output(o)), &
|
||
'mobile dislocation density','1/m²')
|
||
case('rho_dip')
|
||
if(prm%sum_N_sl>0) call results_writeDataset(stt%rho_dip,group,trim(prm%output(o)), &
|
||
'dislocation dipole density','1/m²')
|
||
case('gamma_sl')
|
||
if(prm%sum_N_sl>0) call results_writeDataset(stt%gamma_sl,group,trim(prm%output(o)), &
|
||
'plastic shear','1')
|
||
case('Lambda_sl')
|
||
if(prm%sum_N_sl>0) call results_writeDataset(dst%Lambda_sl,group,trim(prm%output(o)), &
|
||
'mean free path for slip','m')
|
||
case('tau_pass')
|
||
if(prm%sum_N_sl>0) call results_writeDataset(dst%tau_pass,group,trim(prm%output(o)), &
|
||
'threshold stress for slip','Pa')
|
||
end select
|
||
enddo outputsLoop
|
||
end associate
|
||
|
||
end subroutine plastic_dislotungsten_results
|
||
|
||
|
||
!--------------------------------------------------------------------------------------------------
|
||
!> @brief Calculate shear rates on slip systems, their derivatives with respect to resolved
|
||
! stress, and the resolved stress.
|
||
!> @details Derivatives and resolved stress are calculated only optionally.
|
||
! NOTE: Against the common convention, the result (i.e. intent(out)) variables are the last to
|
||
! have the optional arguments at the end
|
||
!--------------------------------------------------------------------------------------------------
|
||
pure subroutine kinetics(Mp,T,ph,en, &
|
||
dot_gamma_pos,dot_gamma_neg,ddot_gamma_dtau_pos,ddot_gamma_dtau_neg,tau_pos_out,tau_neg_out)
|
||
|
||
real(pReal), dimension(3,3), intent(in) :: &
|
||
Mp !< Mandel stress
|
||
real(pReal), intent(in) :: &
|
||
T !< temperature
|
||
integer, intent(in) :: &
|
||
ph, &
|
||
en
|
||
|
||
real(pReal), intent(out), dimension(param(ph)%sum_N_sl) :: &
|
||
dot_gamma_pos, &
|
||
dot_gamma_neg
|
||
real(pReal), intent(out), optional, dimension(param(ph)%sum_N_sl) :: &
|
||
ddot_gamma_dtau_pos, &
|
||
ddot_gamma_dtau_neg, &
|
||
tau_pos_out, &
|
||
tau_neg_out
|
||
real(pReal), dimension(param(ph)%sum_N_sl) :: &
|
||
StressRatio, &
|
||
StressRatio_p,StressRatio_pminus1, &
|
||
dvel, vel, &
|
||
tau_pos,tau_neg, &
|
||
t_n, t_k, dtk,dtn
|
||
integer :: j
|
||
|
||
associate(prm => param(ph), stt => state(ph), dst => dependentState(ph))
|
||
|
||
do j = 1, prm%sum_N_sl
|
||
tau_pos(j) = math_tensordot(Mp,prm%P_nS_pos(1:3,1:3,j))
|
||
tau_neg(j) = math_tensordot(Mp,prm%P_nS_neg(1:3,1:3,j))
|
||
enddo
|
||
|
||
|
||
if (present(tau_pos_out)) tau_pos_out = tau_pos
|
||
if (present(tau_neg_out)) tau_neg_out = tau_neg
|
||
|
||
associate(BoltzmannRatio => prm%Q_s/(kB*T), &
|
||
dot_gamma_0 => stt%rho_mob(:,en)*prm%b_sl*prm%v_0, &
|
||
effectiveLength => dst%Lambda_sl(:,en) - prm%w)
|
||
|
||
significantPositiveTau: where(abs(tau_pos)-dst%tau_pass(:,en) > tol_math_check)
|
||
StressRatio = (abs(tau_pos)-dst%tau_pass(:,en))/prm%tau_Peierls
|
||
StressRatio_p = StressRatio** prm%p
|
||
StressRatio_pminus1 = StressRatio**(prm%p-1.0_pReal)
|
||
|
||
t_n = prm%b_sl/(exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q)*prm%omega*effectiveLength)
|
||
t_k = effectiveLength * prm%B /(2.0_pReal*prm%b_sl*tau_pos)
|
||
|
||
vel = prm%h/(t_n + t_k)
|
||
|
||
dot_gamma_pos = dot_gamma_0 * sign(vel,tau_pos) * 0.5_pReal
|
||
else where significantPositiveTau
|
||
dot_gamma_pos = 0.0_pReal
|
||
end where significantPositiveTau
|
||
|
||
if (present(ddot_gamma_dtau_pos)) then
|
||
significantPositiveTau2: where(abs(tau_pos)-dst%tau_pass(:,en) > tol_math_check)
|
||
dtn = -1.0_pReal * t_n * BoltzmannRatio * prm%p * prm%q * (1.0_pReal-StressRatio_p)**(prm%q - 1.0_pReal) &
|
||
* (StressRatio)**(prm%p - 1.0_pReal) / prm%tau_Peierls
|
||
dtk = -1.0_pReal * t_k / tau_pos
|
||
|
||
dvel = -1.0_pReal * prm%h * (dtk + dtn) / (t_n + t_k)**2.0_pReal
|
||
|
||
ddot_gamma_dtau_pos = dot_gamma_0 * dvel* 0.5_pReal
|
||
else where significantPositiveTau2
|
||
ddot_gamma_dtau_pos = 0.0_pReal
|
||
end where significantPositiveTau2
|
||
endif
|
||
|
||
significantNegativeTau: where(abs(tau_neg)-dst%tau_pass(:,en) > tol_math_check)
|
||
StressRatio = (abs(tau_neg)-dst%tau_pass(:,en))/prm%tau_Peierls
|
||
StressRatio_p = StressRatio** prm%p
|
||
StressRatio_pminus1 = StressRatio**(prm%p-1.0_pReal)
|
||
|
||
t_n = prm%b_sl/(exp(-BoltzmannRatio*(1-StressRatio_p) ** prm%q)*prm%omega*effectiveLength)
|
||
t_k = effectiveLength * prm%B /(2.0_pReal*prm%b_sl*tau_pos)
|
||
|
||
vel = prm%h/(t_n + t_k)
|
||
|
||
dot_gamma_neg = dot_gamma_0 * sign(vel,tau_neg) * 0.5_pReal
|
||
else where significantNegativeTau
|
||
dot_gamma_neg = 0.0_pReal
|
||
end where significantNegativeTau
|
||
|
||
if (present(ddot_gamma_dtau_neg)) then
|
||
significantNegativeTau2: where(abs(tau_neg)-dst%tau_pass(:,en) > tol_math_check)
|
||
dtn = -1.0_pReal * t_n * BoltzmannRatio * prm%p * prm%q * (1.0_pReal-StressRatio_p)**(prm%q - 1.0_pReal) &
|
||
* (StressRatio)**(prm%p - 1.0_pReal) / prm%tau_Peierls
|
||
dtk = -1.0_pReal * t_k / tau_neg
|
||
|
||
dvel = -1.0_pReal * prm%h * (dtk + dtn) / (t_n + t_k)**2.0_pReal
|
||
|
||
ddot_gamma_dtau_neg = dot_gamma_0 * dvel * 0.5_pReal
|
||
else where significantNegativeTau2
|
||
ddot_gamma_dtau_neg = 0.0_pReal
|
||
end where significantNegativeTau2
|
||
end if
|
||
|
||
end associate
|
||
end associate
|
||
|
||
end subroutine kinetics
|
||
|
||
end submodule dislotungsten
|