introduced atol_twinfrac for dislotwin
set values in material.config example atol_rho 1.0, atol_twinFrac 1.0e-7
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Martin Diehl
parent
77c0b32af9
commit
cd0325baf1
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@ -427,7 +427,7 @@ pexponent 1.0 # p-exponent in glide velocity
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qexponent 1.0 # q-exponent in glide velocity
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Catomicvolume 1.0 # Adj. parameter controlling the atomic volume [in b]
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Cedgedipmindistance 1.0 # Adj. parameter controlling the minimum dipole distance [in b]
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atol_rho 1.0e-200
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atol_rho 1.0
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interactionSlipSlip 0.122 0.122 0.625 0.07 0.137 0.122 # Interaction coefficients (Kubin et al. 2008)
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### Shearband parameters ###
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@ -447,6 +447,7 @@ Cmfptwin 1.0 # Adj. parameter controlling twin mean free
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Cthresholdtwin 1.0 # Adj. parameter controlling twin threshold stress
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interactionSlipTwin 0.0 1.0 # Dislocation-Twin interaction coefficients
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interactionTwinTwin 0.0 1.0 # Twin-Twin interaction coefficients
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atol_twinFrac 1.0e-7
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SFE_0K -0.0396 # stacking fault energy at zero K; TWIP steel: -0.0526; Cu: -0.0396
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dSFE_dT 0.0002 # temperature dependance of stacking fault energy
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@ -76,7 +76,8 @@ real(pReal), dimension(:), allocatable :: constitutive_dislotwin
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constitutive_dislotwin_sbQedge, & ! FIXED (for now) value for shearband systems Qedge
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constitutive_dislotwin_SFE_0K, & ! stacking fault energy at zero K
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constitutive_dislotwin_dSFE_dT, & ! temperature dependance of stacking fault energy
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constitutive_dislotwin_aTolRho ! absolute tolerance for integration of dislocation density
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constitutive_dislotwin_aTolRho, & ! absolute tolerance for integration of dislocation density
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constitutive_dislotwin_aTolTwinFrac ! absolute tolerance for integration of twin volume fraction
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real(pReal), dimension(:,:,:), allocatable :: constitutive_dislotwin_Cslip_66 ! elasticity matrix in Mandel notation for each instance
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real(pReal), dimension(:,:,:,:), allocatable :: constitutive_dislotwin_Ctwin_66 ! twin elasticity matrix in Mandel notation for each instance
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real(pReal), dimension(:,:,:,:,:), allocatable :: constitutive_dislotwin_Cslip_3333 ! elasticity matrix for each instance
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@ -211,6 +212,8 @@ allocate(constitutive_dislotwin_L0(maxNinstance))
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constitutive_dislotwin_L0 = 0.0_pReal
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allocate(constitutive_dislotwin_aTolRho(maxNinstance))
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constitutive_dislotwin_aTolRho = 0.0_pReal
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allocate(constitutive_dislotwin_aTolTwinFrac(maxNinstance))
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constitutive_dislotwin_aTolTwinFrac = 0.0_pReal
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allocate(constitutive_dislotwin_Cslip_66(6,6,maxNinstance))
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constitutive_dislotwin_Cslip_66 = 0.0_pReal
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allocate(constitutive_dislotwin_Cslip_3333(3,3,3,3,maxNinstance))
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@ -363,6 +366,8 @@ do ! read thru sections of
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constitutive_dislotwin_Qsd(i) = IO_floatValue(line,positions,2_pInt)
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case ('atol_rho')
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constitutive_dislotwin_aTolRho(i) = IO_floatValue(line,positions,2_pInt)
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case ('atol_twinfrac')
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constitutive_dislotwin_aTolTwinFrac(i) = IO_floatValue(line,positions,2_pInt)
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case ('cmfptwin')
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constitutive_dislotwin_Cmfptwin(i) = IO_floatValue(line,positions,2_pInt)
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case ('cthresholdtwin')
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@ -444,15 +449,17 @@ enddo
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//constitutive_dislotwin_label//')')
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if (constitutive_dislotwin_Qsd(i) <= 0.0_pReal) call IO_error(211_pInt,e=i,ext_msg='Qsd (' &
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//constitutive_dislotwin_label//')')
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if (constitutive_dislotwin_aTolRho(i) <= 0.0_pReal) call IO_error(211_pInt,e=i,ext_msg='aTolRho (' &
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if (constitutive_dislotwin_SFE_0K(i) == 0.0_pReal .and. &
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constitutive_dislotwin_dSFE_dT(i) == 0.0_pReal) call IO_error(211_pInt,e=i,ext_msg='SFE (' &
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//constitutive_dislotwin_label//')')
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if (constitutive_dislotwin_sbResistance(i) <= 0.0_pReal) call IO_error(211_pInt,e=i,ext_msg='sbResistance (' &
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if (constitutive_dislotwin_aTolRho(i) <= 0.0_pReal) call IO_error(211_pInt,e=i,ext_msg='aTolRho (' &
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//constitutive_dislotwin_label//')')
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if (constitutive_dislotwin_aTolTwinFrac(i) <= 0.0_pReal) call IO_error(211_pInt,e=i,ext_msg='aTolTwinFrac (' &
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//constitutive_dislotwin_label//')')
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if (constitutive_dislotwin_sbResistance(i) < 0.0_pReal) call IO_error(211_pInt,e=i,ext_msg='sbResistance (' &
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//constitutive_dislotwin_label//')')
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if (constitutive_dislotwin_sbVelocity(i) < 0.0_pReal) call IO_error(211_pInt,e=i,ext_msg='sbVelocity (' &
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//constitutive_dislotwin_label//')')
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if (constitutive_dislotwin_SFE_0K(i) == 0.0_pReal .AND. &
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constitutive_dislotwin_dSFE_dT(i) == 0.0_pReal) call IO_error(211_pInt,e=i,ext_msg='SFE (' &
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//constitutive_dislotwin_label//')')
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!* Determine total number of active slip or twin systems
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constitutive_dislotwin_Nslip(:,i) = min(lattice_NslipSystem(:,myStructure),constitutive_dislotwin_Nslip(:,i))
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@ -750,18 +757,22 @@ constitutive_dislotwin_stateInit(6_pInt*ns+4_pInt*nt+1_pInt:6_pInt*ns+5_pInt*nt)
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end function
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!--------------------------------------------------------------------------------------------------
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!> @brief absolute state tolerance
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!--------------------------------------------------------------------------------------------------
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pure function constitutive_dislotwin_aTolState(myInstance)
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!*********************************************************************
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!* absolute state tolerance *
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!*********************************************************************
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use prec, only: pReal, pInt
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implicit none
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implicit none
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integer(pInt), intent(in) :: myInstance ! number specifying the current instance of the plasticity
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real(pReal), dimension(constitutive_dislotwin_sizeState(myInstance)) :: &
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constitutive_dislotwin_aTolState ! relevant state values for the current instance of this plasticity
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!* Input-Output variables
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integer(pInt), intent(in) :: myInstance
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real(pReal), dimension(constitutive_dislotwin_sizeState(myInstance)) :: constitutive_dislotwin_aTolState
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constitutive_dislotwin_aTolState = constitutive_dislotwin_aTolRho(myInstance)
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constitutive_dislotwin_aTolState(1:2*constitutive_dislotwin_totalNslip(myInstance)) = &
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constitutive_dislotwin_aTolRho(myInstance)
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constitutive_dislotwin_aTolState(2*constitutive_dislotwin_totalNslip(myInstance)+1: &
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2*constitutive_dislotwin_totalNslip(myInstance)+&
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constitutive_dislotwin_totalNtwin(myInstance)) = &
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constitutive_dislotwin_aTolTwinFrac(myInstance)
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end function constitutive_dislotwin_aTolState
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@ -1052,7 +1063,8 @@ do f = 1_pInt,lattice_maxNslipFamily ! loop over
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enddo
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!* Shear banding (shearband) part
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if(constitutive_dislotwin_sbVelocity(myInstance) /= 0.0_pReal) then
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if(constitutive_dislotwin_sbVelocity(myInstance) /= 0.0_pReal .or. &
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constitutive_dislotwin_sbResistance(myInstance) /= 0.0_pReal) then
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gdot_sb = 0.0_pReal
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dgdot_dtausb = 0.0_pReal
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call math_spectralDecompositionSym33(math_Mandel6to33(Tstar_v),eigValues,eigVectors, error)
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