!-------------------------------------------------------------------------------------------------- !> @author Luv Sharma, Max-Planck-Institut für Eisenforschung GmbH !> @author Pratheek Shanthraj, Max-Planck-Institut für Eisenforschung GmbH !> @brief material subroutine incorporating kinematics resulting from opening of slip planes !> @details to be done !-------------------------------------------------------------------------------------------------- module kinematics_slipplane_opening use prec use config use IO use debug use math use lattice use material implicit none private integer, dimension(:), allocatable :: kinematics_slipplane_opening_instance type :: tParameters !< container type for internal constitutive parameters integer :: & totalNslip integer, dimension(:), allocatable :: & Nslip !< active number of slip systems per family real(pReal) :: & sdot0, & n real(pReal), dimension(:), allocatable :: & critLoad real(pReal), dimension(:,:), allocatable :: & slip_direction, & slip_normal, & slip_transverse end type tParameters type(tParameters), dimension(:), allocatable :: param !< containers of constitutive parameters (len Ninstance) public :: & kinematics_slipplane_opening_init, & kinematics_slipplane_opening_LiAndItsTangent contains !-------------------------------------------------------------------------------------------------- !> @brief module initialization !> @details reads in material parameters, allocates arrays, and does sanity checks !-------------------------------------------------------------------------------------------------- subroutine kinematics_slipplane_opening_init integer :: Ninstance,p write(6,'(/,a)') ' <<<+- kinematics_'//KINEMATICS_slipplane_opening_LABEL//' init -+>>>'; flush(6) Ninstance = count(phase_kinematics == KINEMATICS_slipplane_opening_ID) if (iand(debug_level(debug_constitutive),debug_levelBasic) /= 0) & write(6,'(a16,1x,i5,/)') '# instances:',Ninstance allocate(kinematics_slipplane_opening_instance(size(config_phase)), source=0) allocate(param(Ninstance)) do p = 1, size(config_phase) kinematics_slipplane_opening_instance(p) = count(phase_kinematics(:,1:p) == kinematics_slipplane_opening_ID) if (all(phase_kinematics(:,p) /= KINEMATICS_slipplane_opening_ID)) cycle associate(prm => param(kinematics_slipplane_opening_instance(p)), & config => config_phase(p)) prm%sdot0 = config%getFloat('anisoductile_sdot0') prm%n = config%getFloat('anisoductile_ratesensitivity') prm%Nslip = config%getInts('nslip') prm%slip_direction = lattice_slip_direction (prm%Nslip,config%getString('lattice_structure'),& config%getFloat('c/a',defaultVal=0.0_pReal)) prm%slip_normal = lattice_slip_normal (prm%Nslip,config%getString('lattice_structure'),& config%getFloat('c/a',defaultVal=0.0_pReal)) prm%slip_transverse = lattice_slip_transverse(prm%Nslip,config%getString('lattice_structure'),& config%getFloat('c/a',defaultVal=0.0_pReal)) prm%critLoad = config%getFloats('anisoductile_criticalload',requiredSize=size(prm%Nslip)) prm%critLoad = math_expand(prm%critLoad, prm%Nslip) ! if (kinematics_slipplane_opening_sdot_0(instance) <= 0.0_pReal) & ! call IO_error(211,el=instance,ext_msg='sdot_0 ('//KINEMATICS_slipplane_opening_LABEL//')') ! if (any(kinematics_slipplane_opening_critPlasticStrain(:,instance) < 0.0_pReal)) & ! call IO_error(211,el=instance,ext_msg='criticaPlasticStrain ('//KINEMATICS_slipplane_opening_LABEL//')') ! if (kinematics_slipplane_opening_N(instance) <= 0.0_pReal) & ! call IO_error(211,el=instance,ext_msg='rate_sensitivity ('//KINEMATICS_slipplane_opening_LABEL//')') end associate enddo end subroutine kinematics_slipplane_opening_init !-------------------------------------------------------------------------------------------------- !> @brief contains the constitutive equation for calculating the velocity gradient !-------------------------------------------------------------------------------------------------- subroutine kinematics_slipplane_opening_LiAndItsTangent(Ld, dLd_dTstar, S, ipc, ip, el) integer, intent(in) :: & ipc, & !< grain number ip, & !< integration point number el !< element number real(pReal), intent(in), dimension(3,3) :: & S real(pReal), intent(out), dimension(3,3) :: & Ld !< damage velocity gradient real(pReal), intent(out), dimension(3,3,3,3) :: & dLd_dTstar !< derivative of Ld with respect to Tstar (4th-order tensor) real(pReal), dimension(3,3) :: & projection_d, projection_t, projection_n !< projection modes 3x3 tensor integer :: & instance, phase, & homog, damageOffset, & i, k, l, m, n real(pReal) :: & traction_d, traction_t, traction_n, traction_crit, & udotd, dudotd_dt, udott, dudott_dt, udotn, dudotn_dt phase = material_phaseAt(ipc,el) instance = kinematics_slipplane_opening_instance(phase) homog = material_homogenizationAt(el) damageOffset = damageMapping(homog)%p(ip,el) associate(prm => param(instance)) Ld = 0.0_pReal dLd_dTstar = 0.0_pReal do i = 1, prm%totalNslip projection_d = math_outer(prm%slip_direction(1:3,i), prm%slip_normal(1:3,i)) projection_t = math_outer(prm%slip_transverse(1:3,i),prm%slip_normal(1:3,i)) projection_n = math_outer(prm%slip_normal(1:3,i), prm%slip_normal(1:3,i)) traction_d = math_mul33xx33(S,projection_d) traction_t = math_mul33xx33(S,projection_t) traction_n = math_mul33xx33(S,projection_n) traction_crit = prm%critLoad(i)* damage(homog)%p(damageOffset) ! degrading critical load carrying capacity by damage udotd = sign(1.0_pReal,traction_d)* prm%sdot0* ( abs(traction_d)/traction_crit & - abs(traction_d)/prm%critLoad(i))**prm%n udott = sign(1.0_pReal,traction_t)* prm%sdot0* ( abs(traction_t)/traction_crit & - abs(traction_t)/prm%critLoad(i))**prm%n udotn = prm%sdot0* ( max(0.0_pReal,traction_n)/traction_crit & - max(0.0_pReal,traction_n)/prm%critLoad(i))**prm%n if (dNeq0(traction_d)) then dudotd_dt = udotd*prm%n/traction_d else dudotd_dt = 0.0_pReal endif if (dNeq0(traction_t)) then dudott_dt = udott*prm%n/traction_t else dudott_dt = 0.0_pReal endif if (dNeq0(traction_n)) then dudotn_dt = udotn*prm%n/traction_n else dudotn_dt = 0.0_pReal endif forall (k=1:3,l=1:3,m=1:3,n=1:3) & dLd_dTstar(k,l,m,n) = dLd_dTstar(k,l,m,n) + dudotd_dt*projection_d(k,l)*projection_d(m,n) & + dudott_dt*projection_t(k,l)*projection_t(m,n) & + dudotn_dt*projection_n(k,l)*projection_n(m,n) Ld = Ld + udotd*projection_d & + udott*projection_t & + udotn*projection_n enddo end associate end subroutine kinematics_slipplane_opening_LiAndItsTangent end module kinematics_slipplane_opening