From 3ce1882d29e807abeb9620f83a81c9d345d2016f Mon Sep 17 00:00:00 2001 From: Christoph Kords Date: Mon, 7 Jun 2010 16:01:37 +0000 Subject: [PATCH] when calculating dislocation stress at grain boundaries, densities are now extrapolated similarly to like it was already done at free surfaces --- code/constitutive.f90 | 14 ++++++++------ code/constitutive_nonlocal.f90 | 24 +++++++++++++++--------- code/crystallite.f90 | 4 ++-- 3 files changed, 25 insertions(+), 17 deletions(-) diff --git a/code/constitutive.f90 b/code/constitutive.f90 index af7bfc196..47746c20c 100644 --- a/code/constitutive.f90 +++ b/code/constitutive.f90 @@ -310,7 +310,7 @@ return endfunction -subroutine constitutive_microstructure(Temperature,Tstar_v,Fe,Fp,ipc,ip,el) +subroutine constitutive_microstructure(Temperature,Tstar_v,Fe,Fp,disorientation,ipc,ip,el) !********************************************************************* !* This function calculates from state needed variables * !* INPUT: * @@ -325,7 +325,8 @@ subroutine constitutive_microstructure(Temperature,Tstar_v,Fe,Fp,ipc,ip,el) material_phase, & homogenization_maxNgrains use mesh, only: mesh_NcpElems, & - mesh_maxNips + mesh_maxNips, & + mesh_maxNipNeighbors use constitutive_j2 use constitutive_phenopowerlaw use constitutive_dislotwin @@ -337,6 +338,7 @@ integer(pInt), intent(in) :: ipc,ip,el real(pReal), intent(in) :: Temperature real(pReal), dimension(6) :: Tstar_v real(pReal), dimension(3,3,homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems), intent(in) :: Fe, Fp +real(pReal), dimension(4,mesh_maxNipNeighbors), intent(in) :: disorientation select case (phase_constitution(material_phase(ipc,ip,el))) @@ -350,7 +352,7 @@ real(pReal), dimension(3,3,homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems) call constitutive_dislotwin_microstructure(Temperature,constitutive_state,ipc,ip,el) case (constitutive_nonlocal_label) - call constitutive_nonlocal_microstructure(constitutive_state, Temperature, Tstar_v, Fe, Fp, ipc, ip, el) + call constitutive_nonlocal_microstructure(constitutive_state, Temperature, Tstar_v, Fe, Fp, disorientation, ipc, ip, el) end select @@ -405,7 +407,7 @@ subroutine constitutive_LpAndItsTangent(Lp, dLp_dTstar, Tstar_v, Temperature, ip endsubroutine -subroutine constitutive_collectDotState(Tstar_v, subTstar0_v, Fe, Fp, Temperature, misorientation, subdt, ipc, ip, el) +subroutine constitutive_collectDotState(Tstar_v, subTstar0_v, Fe, Fp, Temperature, disorientation, subdt, ipc, ip, el) !********************************************************************* !* This subroutine contains the constitutive equation for * !* calculating the rate of change of microstructure * @@ -439,7 +441,7 @@ integer(pInt), intent(in) :: ipc, ip, el real(pReal), intent(in) :: Temperature, & subdt real(pReal), dimension(4,mesh_maxNipNeighbors), intent(in) :: & - misorientation + disorientation real(pReal), dimension(3,3,homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems), intent(in) :: & Fe, & Fp @@ -466,7 +468,7 @@ select case (phase_constitution(material_phase(ipc,ip,el))) constitutive_dotState(ipc,ip,el)%p = constitutive_dislotwin_dotState(Tstar_v,Temperature,constitutive_state,ipc,ip,el) case (constitutive_nonlocal_label) - call constitutive_nonlocal_dotState(constitutive_dotState, Tstar_v, subTstar0_v, Fe, Fp, Temperature, misorientation, subdt, & + call constitutive_nonlocal_dotState(constitutive_dotState, Tstar_v, subTstar0_v, Fe, Fp, Temperature, disorientation, subdt, & constitutive_state, constitutive_subState0, constitutive_relevantState, subdt, ipc, ip, el) end select diff --git a/code/constitutive_nonlocal.f90 b/code/constitutive_nonlocal.f90 index ae0a49cfc..837fa6c4c 100644 --- a/code/constitutive_nonlocal.f90 +++ b/code/constitutive_nonlocal.f90 @@ -749,7 +749,7 @@ endfunction !********************************************************************* !* calculates quantities characterizing the microstructure * !********************************************************************* -subroutine constitutive_nonlocal_microstructure(state, Temperature, Tstar_v, Fe, Fp, g, ip, el) +subroutine constitutive_nonlocal_microstructure(state, Temperature, Tstar_v, Fe, Fp, disorientation, g, ip, el) use prec, only: pReal, & pInt, & @@ -768,6 +768,7 @@ use debug, only: debugger, & selectiveDebugger use mesh, only: mesh_NcpElems, & mesh_maxNips, & + mesh_maxNipNeighbors, & mesh_element, & FE_NipNeighbors, & mesh_ipNeighborhood, & @@ -797,6 +798,8 @@ real(pReal), dimension(3,3,homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems) Fp ! plastic deformation gradient real(pReal), dimension(6), intent(in) :: & Tstar_v ! 2nd Piola-Kirchhoff stress in Mandel notation +real(pReal), dimension(4,mesh_maxNipNeighbors), intent(in) :: & + disorientation ! crystal disorientation between me and my neighbor as quaternion !*** input/output variables @@ -831,6 +834,7 @@ real(pReal) gb, & ! short notation f L, & ! dislocation segment length r1_2, & r2_2 +real(pReal), dimension(6) :: transmissivity ! transmissivity factor for each interface real(pReal), dimension(2) :: lambda ! distance of (x y z) from the segment end projected onto the dislocation segment real(pReal), dimension(3,6) :: connectingVector ! vector connecting the centers of gravity of me and my neigbor (for each neighbor) real(pReal), dimension(6) :: Tdislocation_v ! dislocation stress (resulting from the neighboring excess dislocation densities) as 2nd Piola-Kirchhoff stress in Mandel notation @@ -903,9 +907,11 @@ invFe = math_inv3x3(Fe) do n = 1,FE_NipNeighbors(mesh_element(2,el)) + transmissivity(n) = constitutive_nonlocal_transmissivity(disorientation(:,n)) + neighboring_el = mesh_ipNeighborhood(1,n,ip,el) neighboring_ip = mesh_ipNeighborhood(2,n,ip,el) - if ( neighboring_ip == 0 ) & + if ( neighboring_ip == 0 .or. transmissivity(n) < 1.0_pReal ) & ! if no neighbor present or at grain boundary, don't calculate anything, since we use mirrored connecting vector of opposite neighbor cycle neighboring_F = math_mul33x33(Fe(:,:,g,neighboring_ip,neighboring_el), Fp(:,:,g,neighboring_ip,neighboring_el)) @@ -919,8 +925,8 @@ do n = 1,FE_NipNeighbors(mesh_element(2,el)) opposite_n = n - 1_pInt + 2_pInt*mod(n,2_pInt) opposite_el = mesh_ipNeighborhood(1,opposite_n,ip,el) opposite_ip = mesh_ipNeighborhood(2,opposite_n,ip,el) - if ( opposite_ip == 0 ) & ! if no opposite neighbor present... - connectingVector(:,opposite_n) = -connectingVector(:,n) ! ... assume "ghost" IP at mirrored position of this neighbor + if ( opposite_ip == 0 .or. transmissivity(opposite_n) < 1.0_pReal ) & ! if no opposite neighbor present or at grain boundary ... + connectingVector(:,opposite_n) = -connectingVector(:,n) ! ... use mirrored connecting vector of opposite neighbor enddo @@ -929,17 +935,17 @@ do n = 1,FE_NipNeighbors(mesh_element(2,el)) neighboring_el = mesh_ipNeighborhood(1,n,ip,el) neighboring_ip = mesh_ipNeighborhood(2,n,ip,el) - if ( neighboring_ip == 0 ) then ! if no neighbor present... + if ( neighboring_ip == 0 .or. transmissivity(n) < 1.0_pReal ) then ! if no neighbor present or at grain boundary ... opposite_n = n - 1_pInt + 2_pInt*mod(n,2_pInt) opposite_el = mesh_ipNeighborhood(1,opposite_n,ip,el) opposite_ip = mesh_ipNeighborhood(2,opposite_n,ip,el) - if ( opposite_ip == 0 ) & + if ( opposite_ip == 0 .or. transmissivity(opposite_n) < 1.0_pReal ) & ! (special case if no valid neighbor on both sides) cycle neighboring_el = opposite_el neighboring_ip = opposite_ip forall (t = 1:8, s = 1:ns) & neighboring_rhoSgl(s,t) = max(0.0_pReal, & - 2.0_pReal * state(g,ip,el)%p((t-1)*ns+s) - state(g,opposite_ip,opposite_el)%p((t-1)*ns+s) ) ! ... extrapolate density from opposite neighbor (but assure positive value for density) + 2.0_pReal * state(g,ip,el)%p((t-1)*ns+s) - state(g,opposite_ip,opposite_el)%p((t-1)*ns+s) ) ! ... extrapolate density from opposite neighbor (but assure positive value for density) else forall (t = 1:8) neighboring_rhoSgl(:,t) = state(g,neighboring_ip,neighboring_el)%p((t-1)*ns+1:t*ns) endif @@ -1032,7 +1038,7 @@ do n = 1,FE_NipNeighbors(mesh_element(2,el)) if ( selectiveDebugger .and. verboseDebugger) then write(6,*) - write(6,'(a20,i1,x,i2,x,i5))') '::: microstructure',g,ip,el + write(6,'(a20,i1,x,i2,x,i5)') '::: microstructure ',g,ip,el write(6,'(i2)') n write(6,'(2(a20,x,e12.3,5x))') 'delta_rho_edge:', neighboring_rhoEdgeExcess(s), 'delta_rho_screw:', neighboring_rhoScrewExcess(s) write(6,'(2(a20,x,f12.3,5x))') 'Nedge:', neighboring_Nedge(s), 'Nscrew:', neighboring_Nscrew(s) @@ -1331,7 +1337,7 @@ real(pReal), intent(in) :: Temperature, & ! temperat real(pReal), dimension(6), intent(in) :: Tstar_v, & ! current 2nd Piola-Kirchhoff stress in Mandel notation previousTstar_v ! previous 2nd Piola-Kirchhoff stress in Mandel notation real(pReal), dimension(4,mesh_maxNipNeighbors), intent(in) :: & - disorientation ! crystal disorientation between me and my neighbor (axis, angle pair) + disorientation ! crystal disorientation between me and my neighbor as quaternion real(pReal), dimension(3,3,homogenization_maxNgrains,mesh_maxNips,mesh_NcpElems), intent(in) :: & Fe, & ! elastic deformation gradient Fp ! plastic deformation gradient diff --git a/code/crystallite.f90 b/code/crystallite.f90 index 3973c3b19..7b22a2d71 100644 --- a/code/crystallite.f90 +++ b/code/crystallite.f90 @@ -605,7 +605,7 @@ subroutine crystallite_stressAndItsTangent(updateJaco) selectiveDebugger = (e == debug_e .and. i == debug_i .and. g == debug_g) if (crystallite_todo(g,i,e)) then ! all undone crystallites call constitutive_microstructure(crystallite_Temperature(g,i,e), crystallite_Tstar_v(:,g,i,e), crystallite_Fe, & - crystallite_Fp, g, i, e) ! update dependent state variables to be consistent with basic states + crystallite_Fp, crystallite_disorientation(:,:,g,i,e), g, i, e) ! update dependent state variables to be consistent with basic states constitutive_previousDotState2(g,i,e)%p = 0.0_pReal constitutive_previousDotState(g,i,e)%p = 0.0_pReal constitutive_dotState(g,i,e)%p = 0.0_pReal ! zero out dotStates @@ -1143,7 +1143,7 @@ endsubroutine ! update the microstructure constitutive_state(g,i,e)%p(1:mySize) = constitutive_state(g,i,e)%p(1:mySize) - residuum call constitutive_microstructure(crystallite_Temperature(g,i,e), crystallite_Tstar_v(:,g,i,e), crystallite_Fe, crystallite_Fp, & - g, i, e) + crystallite_disorientation(:,:,g,i,e), g, i, e) ! setting flag to true if state is below relative tolerance, otherwise set it to false