using names from DAMASK paper
This commit is contained in:
Martin Diehl
parent
3700bacccc
commit
daab9263d3
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@ -22,25 +22,25 @@ module plastic_isotropic
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enum, bind(c)
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enumerator :: &
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undefined_ID, &
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flowstress_ID, &
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xi_ID, &
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strainrate_ID
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end enum
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type, private :: tParameters
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real(pReal) :: &
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fTaylor, & !< Taylor factor
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tau0, & !< initial critical stress
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M, & !< Taylor factor
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xi_0, & !< initial critical stress
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gdot0, & !< reference strain rate
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n, & !< stress exponent
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h0, &
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h0_slopeLnRate, &
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tausat, & !< maximum critical stress
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xi_inf, & !< maximum critical stress
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a, &
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tausat_SinhFitA, &
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tausat_SinhFitB, &
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tausat_SinhFitC, &
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tausat_SinhFitD, &
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aTolFlowstress, &
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c_1, &
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c_4, &
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c_3, &
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c_2, &
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aTol_xi, &
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aTolShear
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integer :: &
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of_debug = 0
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@ -52,7 +52,7 @@ module plastic_isotropic
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type, private :: tIsotropicState
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real(pReal), pointer, dimension(:) :: &
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flowstress, &
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xi, &
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accumulatedShear
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end type tIsotropicState
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@ -154,19 +154,19 @@ subroutine plastic_isotropic_init
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prm%of_debug = phasememberAt(debug_g,debug_i,debug_e)
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#endif
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prm%tau0 = config%getFloat('tau0')
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prm%tausat = config%getFloat('tausat')
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prm%xi_0 = config%getFloat('tau0')
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prm%xi_inf = config%getFloat('tausat')
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prm%gdot0 = config%getFloat('gdot0')
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prm%n = config%getFloat('n')
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prm%h0 = config%getFloat('h0')
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prm%fTaylor = config%getFloat('m')
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prm%M = config%getFloat('m')
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prm%h0_slopeLnRate = config%getFloat('h0_slopelnrate', defaultVal=0.0_pReal)
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prm%tausat_SinhFitA = config%getFloat('tausat_sinhfita',defaultVal=0.0_pReal)
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prm%tausat_SinhFitB = config%getFloat('tausat_sinhfitb',defaultVal=0.0_pReal)
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prm%tausat_SinhFitC = config%getFloat('tausat_sinhfitc',defaultVal=0.0_pReal)
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prm%tausat_SinhFitD = config%getFloat('tausat_sinhfitd',defaultVal=0.0_pReal)
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prm%c_1 = config%getFloat('tausat_sinhfita',defaultVal=0.0_pReal)
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prm%c_4 = config%getFloat('tausat_sinhfitb',defaultVal=0.0_pReal)
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prm%c_3 = config%getFloat('tausat_sinhfitc',defaultVal=0.0_pReal)
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prm%c_2 = config%getFloat('tausat_sinhfitd',defaultVal=0.0_pReal)
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prm%a = config%getFloat('a')
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prm%aTolFlowStress = config%getFloat('atol_flowstress',defaultVal=1.0_pReal)
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prm%aTol_xi = config%getFloat('atol_flowstress',defaultVal=1.0_pReal)
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prm%aTolShear = config%getFloat('atol_shear', defaultVal=1.0e-6_pReal)
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prm%dilatation = config%keyExists('/dilatation/')
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@ -175,13 +175,12 @@ subroutine plastic_isotropic_init
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! sanity checks
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extmsg = ''
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if (prm%aTolShear <= 0.0_pReal) extmsg = trim(extmsg)//' aTolShear'
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if (prm%tau0 < 0.0_pReal) extmsg = trim(extmsg)//' tau0'
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if (prm%xi_0 < 0.0_pReal) extmsg = trim(extmsg)//' xi_0'
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if (prm%gdot0 <= 0.0_pReal) extmsg = trim(extmsg)//' gdot0'
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if (prm%n <= 0.0_pReal) extmsg = trim(extmsg)//' n'
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if (prm%tausat <= prm%tau0) extmsg = trim(extmsg)//' tausat'
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if (prm%a <= 0.0_pReal) extmsg = trim(extmsg)//' a'
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if (prm%fTaylor <= 0.0_pReal) extmsg = trim(extmsg)//' m'
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if (prm%aTolFlowstress <= 0.0_pReal) extmsg = trim(extmsg)//' atol_flowstress'
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if (prm%M <= 0.0_pReal) extmsg = trim(extmsg)//' m'
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if (prm%aTol_xi <= 0.0_pReal) extmsg = trim(extmsg)//' atol_xi'
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if (prm%aTolShear <= 0.0_pReal) extmsg = trim(extmsg)//' atol_shear'
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!--------------------------------------------------------------------------------------------------
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@ -197,8 +196,8 @@ subroutine plastic_isotropic_init
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outputID = undefined_ID
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select case(outputs(i))
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case ('flowstress')
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outputID = flowstress_ID
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case ('xi')
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outputID = xi_ID
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case ('strainrate')
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outputID = strainrate_ID
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@ -215,7 +214,7 @@ subroutine plastic_isotropic_init
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!--------------------------------------------------------------------------------------------------
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! allocate state arrays
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NipcMyPhase = count(material_phase == p)
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sizeDotState = size(['flowstress ','accumulated_shear'])
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sizeDotState = size(['xi ','accumulated_shear'])
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sizeState = sizeDotState
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call material_allocatePlasticState(p,NipcMyPhase,sizeState,sizeDotState,0, &
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@ -224,10 +223,10 @@ subroutine plastic_isotropic_init
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!--------------------------------------------------------------------------------------------------
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! locally defined state aliases and initialization of state0 and aTolState
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stt%flowstress => plasticState(p)%state (1,:)
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stt%flowstress = prm%tau0
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dot%flowstress => plasticState(p)%dotState(1,:)
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plasticState(p)%aTolState(1) = prm%aTolFlowstress
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stt%xi => plasticState(p)%state (1,:)
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stt%xi = prm%xi_0
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dot%xi => plasticState(p)%dotState(1,:)
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plasticState(p)%aTolState(1) = prm%aTol_xi
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stt%accumulatedShear => plasticState(p)%state (2,:)
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dot%accumulatedShear => plasticState(p)%dotState(2,:)
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@ -288,9 +287,9 @@ subroutine plastic_isotropic_LpAndItsTangent(Lp,dLp_dMp,Mp,instance,of)
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norm_Mp_dev = sqrt(squarenorm_Mp_dev)
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if (norm_Mp_dev > 0.0_pReal) then
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gamma_dot = prm%gdot0 * (sqrt(1.5_pReal) * norm_Mp_dev/(prm%fTaylor*stt%flowstress(of))) **prm%n
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gamma_dot = prm%gdot0 * (sqrt(1.5_pReal) * norm_Mp_dev/(prm%M*stt%xi(of))) **prm%n
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Lp = Mp_dev/norm_Mp_dev * gamma_dot/prm%fTaylor
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Lp = Mp_dev/norm_Mp_dev * gamma_dot/prm%M
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#ifdef DEBUG
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if (iand(debug_level(debug_constitutive), debug_levelExtensive) /= 0 &
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.and. (of == prm%of_debug .or. .not. iand(debug_level(debug_constitutive),debug_levelSelective) /= 0)) then
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@ -306,7 +305,7 @@ subroutine plastic_isotropic_LpAndItsTangent(Lp,dLp_dMp,Mp,instance,of)
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dLp_dMp(k,l,k,l) = dLp_dMp(k,l,k,l) + 1.0_pReal
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forall (k=1:3,m=1:3) &
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dLp_dMp(k,k,m,m) = dLp_dMp(k,k,m,m) - 1.0_pReal/3.0_pReal
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dLp_dMp = gamma_dot / prm%fTaylor * dLp_dMp / norm_Mp_dev
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dLp_dMp = gamma_dot / prm%M * dLp_dMp / norm_Mp_dev
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else
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Lp = 0.0_pReal
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dLp_dMp = 0.0_pReal
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@ -354,15 +353,15 @@ subroutine plastic_isotropic_LiAndItsTangent(Li,dLi_dTstar,Tstar,instance,of)
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norm_Tstar_sph = sqrt(squarenorm_Tstar_sph)
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if (prm%dilatation .and. norm_Tstar_sph > 0.0_pReal) then ! no stress or J2 plastitiy --> Li and its derivative are zero
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gamma_dot = prm%gdot0 * (sqrt(1.5_pReal) * norm_Tstar_sph /(prm%fTaylor*stt%flowstress(of))) **prm%n
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gamma_dot = prm%gdot0 * (sqrt(1.5_pReal) * norm_Tstar_sph /(prm%M*stt%xi(of))) **prm%n
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Li = Tstar_sph/norm_Tstar_sph * gamma_dot/prm%fTaylor
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Li = Tstar_sph/norm_Tstar_sph * gamma_dot/prm%M
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forall (k=1:3,l=1:3,m=1:3,n=1:3) &
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dLi_dTstar(k,l,m,n) = (prm%n-1.0_pReal) * Tstar_sph(k,l)*Tstar_sph(m,n) / squarenorm_Tstar_sph
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forall (k=1:3,l=1:3) &
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dLi_dTstar(k,l,k,l) = dLi_dTstar(k,l,k,l) + 1.0_pReal
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dLi_dTstar = gamma_dot / prm%fTaylor * dLi_dTstar / norm_Tstar_sph
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dLi_dTstar = gamma_dot / prm%M * dLi_dTstar / norm_Tstar_sph
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else
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Li = 0.0_pReal
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dLi_dTstar = 0.0_pReal
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@ -393,7 +392,7 @@ subroutine plastic_isotropic_dotState(Mp,instance,of)
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real(pReal) :: &
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gamma_dot, & !< strainrate
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hardening, & !< hardening coefficient
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saturation, & !< saturation flowstress
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xi_inf_star, & !< saturation xi
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norm_Mp !< norm of the (deviatoric) Mandel stress
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associate(prm => param(instance), stt => state(instance), dot => dotState(instance))
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@ -404,25 +403,25 @@ subroutine plastic_isotropic_dotState(Mp,instance,of)
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norm_Mp = sqrt(math_mul33xx33(math_deviatoric33(Mp),math_deviatoric33(Mp)))
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endif
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gamma_dot = prm%gdot0 * (sqrt(1.5_pReal) * norm_Mp /(prm%fTaylor*stt%flowstress(of))) **prm%n
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gamma_dot = prm%gdot0 * (sqrt(1.5_pReal) * norm_Mp /(prm%M*stt%xi(of))) **prm%n
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if (abs(gamma_dot) > 1e-12_pReal) then
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if (dEq0(prm%tausat_SinhFitA)) then
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saturation = prm%tausat
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if (dEq0(prm%c_1)) then
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xi_inf_star = prm%xi_inf
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else
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saturation = prm%tausat &
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+ asinh( (gamma_dot / prm%tausat_SinhFitA)**(1.0_pReal / prm%tausat_SinhFitD) &
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)**(1.0_pReal / prm%tausat_SinhFitC) &
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/ prm%tausat_SinhFitB * (gamma_dot / prm%gdot0)**(1.0_pReal / prm%n)
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xi_inf_star = prm%xi_inf &
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+ asinh( (gamma_dot / prm%c_1)**(1.0_pReal / prm%c_2) &
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)**(1.0_pReal / prm%c_3) &
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/ prm%c_4 * (gamma_dot / prm%gdot0)**(1.0_pReal / prm%n)
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endif
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hardening = ( prm%h0 + prm%h0_slopeLnRate * log(gamma_dot) ) &
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* abs( 1.0_pReal - stt%flowstress(of)/saturation )**prm%a &
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* sign(1.0_pReal, 1.0_pReal - stt%flowstress(of)/saturation)
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* abs( 1.0_pReal - stt%xi(of)/xi_inf_star )**prm%a &
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* sign(1.0_pReal, 1.0_pReal - stt%xi(of)/xi_inf_star)
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else
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hardening = 0.0_pReal
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endif
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dot%flowstress (of) = hardening * gamma_dot
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dot%xi (of) = hardening * gamma_dot
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dot%accumulatedShear(of) = gamma_dot
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end associate
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@ -466,12 +465,12 @@ function plastic_isotropic_postResults(Mp,instance,of) result(postResults)
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outputsLoop: do o = 1,size(prm%outputID)
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select case(prm%outputID(o))
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case (flowstress_ID)
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postResults(c+1) = stt%flowstress(of)
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case (xi_ID)
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postResults(c+1) = stt%xi(of)
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c = c + 1
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case (strainrate_ID)
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postResults(c+1) = prm%gdot0 &
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* (sqrt(1.5_pReal) * norm_Mp /(prm%fTaylor * stt%flowstress(of)))**prm%n
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* (sqrt(1.5_pReal) * norm_Mp /(prm%M * stt%xi(of)))**prm%n
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c = c + 1
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end select
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