!-------------------------------------------------------------------------------------------------- !> @author Pratheek Shanthraj, Max-Planck-Institut für Eisenforschung GmbH !> @author Martin Diehl, Max-Planck-Institut für Eisenforschung GmbH !> @author Philip Eisenlohr, Max-Planck-Institut für Eisenforschung GmbH !> @brief FEM PETSc solver !-------------------------------------------------------------------------------------------------- module mesh_mech_FEM #include #include #include use PETScsnes use PETScDM use PETScDMplex use PETScDT use prec use FEM_utilities use discretization_mesh use DAMASK_interface use config use IO use FEM_quadrature use homogenization use math implicit none private !-------------------------------------------------------------------------------------------------- ! derived types type tSolutionParams type(tFieldBC) :: fieldBC real(pReal) :: timeinc real(pReal) :: timeincOld end type tSolutionParams type(tSolutionParams) :: params type, private :: tNumerics integer :: & integrationOrder, & !< order of quadrature rule required itmax logical :: & BBarStabilisation real(pReal) :: & eps_struct_atol, & !< absolute tolerance for mechanical equilibrium eps_struct_rtol !< relative tolerance for mechanical equilibrium end type tNumerics type(tNumerics), private :: num !-------------------------------------------------------------------------------------------------- ! PETSc data SNES :: mech_snes Vec :: solution, solution_rate, solution_local PetscInt :: dimPlex, cellDof, nQuadrature, nBasis PetscReal, allocatable, target :: qPoints(:), qWeights(:) MatNullSpace :: matnull !-------------------------------------------------------------------------------------------------- ! stress, stiffness and compliance average etc. character(len=pStringLen) :: incInfo real(pReal), dimension(3,3) :: & P_av = 0.0_pReal logical :: ForwardData real(pReal), parameter :: eps = 1.0e-18_pReal public :: & FEM_mech_init, & FEM_mech_solution, & FEM_mech_forward contains !-------------------------------------------------------------------------------------------------- !> @brief allocates all neccessary fields and fills them with data !-------------------------------------------------------------------------------------------------- subroutine FEM_mech_init(fieldBC) type(tFieldBC), intent(in) :: fieldBC DM :: mech_mesh PetscFE :: mechFE PetscQuadrature :: mechQuad, functional PetscDS :: mechDS PetscDualSpace :: mechDualSpace DMLabel, dimension(:),pointer :: nolabel=> NULL() DMLabel :: BCLabel PetscInt, dimension(:), pointer :: pNumComp, pNumDof, pBcField, pBcPoint PetscInt :: numBC, bcSize, nc, & field, faceSet, topologDim, nNodalPoints, & cellStart, cellEnd, cell, basis IS :: bcPoint IS, dimension(:), pointer :: pBcComps, pBcPoints PetscSection :: section PetscReal, dimension(:), pointer :: qPointsP, qWeightsP, & nodalPointsP, nodalWeightsP,pV0, pCellJ, pInvcellJ PetscReal :: detJ PetscReal, allocatable, target :: cellJMat(:,:) PetscScalar, pointer :: px_scal(:) PetscScalar, allocatable, target :: x_scal(:) character(len=*), parameter :: prefix = 'mechFE_' PetscErrorCode :: ierr class(tNode), pointer :: & num_mesh write(6,'(/,a)') ' <<<+- FEM_mech init -+>>>'; flush(6) !----------------------------------------------------------------------------- ! read numerical parametes and do sanity checks num_mesh => numerics_root%get('mesh',defaultVal=emptyDict) num%integrationOrder = num_mesh%get_asInt('integrationorder',defaultVal = 2) num%itmax = num_mesh%get_asInt('itmax',defaultVal=250) num%BBarStabilisation = num_mesh%get_asBool('bbarstabilisation',defaultVal = .false.) num%eps_struct_atol = num_mesh%get_asFloat('eps_struct_atol', defaultVal = 1.0e-10_pReal) num%eps_struct_rtol = num_mesh%get_asFloat('eps_struct_rtol', defaultVal = 1.0e-4_pReal) if (num%itmax <= 1) call IO_error(301,ext_msg='itmax') if (num%eps_struct_rtol <= 0.0_pReal) call IO_error(301,ext_msg='eps_struct_rtol') if (num%eps_struct_atol <= 0.0_pReal) call IO_error(301,ext_msg='eps_struct_atol') !-------------------------------------------------------------------------------------------------- ! Setup FEM mech mesh call DMClone(geomMesh,mech_mesh,ierr); CHKERRQ(ierr) call DMGetDimension(mech_mesh,dimPlex,ierr); CHKERRQ(ierr) !-------------------------------------------------------------------------------------------------- ! Setup FEM mech discretization qPoints = FEM_quadrature_points( dimPlex,num%integrationOrder)%p qWeights = FEM_quadrature_weights(dimPlex,num%integrationOrder)%p nQuadrature = FEM_nQuadrature( dimPlex,num%integrationOrder) qPointsP => qPoints qWeightsP => qWeights call PetscQuadratureCreate(PETSC_COMM_SELF,mechQuad,ierr); CHKERRQ(ierr) CHKERRQ(ierr) nc = dimPlex call PetscQuadratureSetData(mechQuad,dimPlex,nc,nQuadrature,qPointsP,qWeightsP,ierr) CHKERRQ(ierr) call PetscFECreateDefault(PETSC_COMM_SELF,dimPlex,nc,PETSC_TRUE,prefix, & num%integrationOrder,mechFE,ierr); CHKERRQ(ierr) call PetscFESetQuadrature(mechFE,mechQuad,ierr); CHKERRQ(ierr) call PetscFEGetDimension(mechFE,nBasis,ierr); CHKERRQ(ierr) nBasis = nBasis/nc #if (PETSC_VERSION_MINOR > 10) call DMAddField(mech_mesh,PETSC_NULL_DMLABEL,mechFE,ierr); CHKERRQ(ierr) call DMCreateDS(mech_mesh,ierr); CHKERRQ(ierr) #endif call DMGetDS(mech_mesh,mechDS,ierr); CHKERRQ(ierr) #if (PETSC_VERSION_MINOR < 11) call PetscDSAddDiscretization(mechDS,mechFE,ierr); CHKERRQ(ierr) #endif call PetscDSGetTotalDimension(mechDS,cellDof,ierr); CHKERRQ(ierr) call PetscFEDestroy(mechFE,ierr); CHKERRQ(ierr) call PetscQuadratureDestroy(mechQuad,ierr); CHKERRQ(ierr) !-------------------------------------------------------------------------------------------------- ! Setup FEM mech boundary conditions call DMGetLabel(mech_mesh,'Face Sets',BCLabel,ierr); CHKERRQ(ierr) call DMPlexLabelComplete(mech_mesh,BCLabel,ierr); CHKERRQ(ierr) #if (PETSC_VERSION_MINOR < 12) call DMGetSection(mech_mesh,section,ierr); CHKERRQ(ierr) #else call DMGetLocalSection(mech_mesh,section,ierr); CHKERRQ(ierr) #endif allocate(pnumComp(1), source=dimPlex) allocate(pnumDof(0:dimPlex), source = 0) do topologDim = 0, dimPlex call DMPlexGetDepthStratum(mech_mesh,topologDim,cellStart,cellEnd,ierr) CHKERRQ(ierr) call PetscSectionGetDof(section,cellStart,pnumDof(topologDim),ierr) CHKERRQ(ierr) enddo numBC = 0 do field = 1, dimPlex; do faceSet = 1, mesh_Nboundaries if (fieldBC%componentBC(field)%Mask(faceSet)) numBC = numBC + 1 enddo; enddo allocate(pbcField(numBC), source=0) allocate(pbcComps(numBC)) allocate(pbcPoints(numBC)) numBC = 0 do field = 1, dimPlex; do faceSet = 1, mesh_Nboundaries if (fieldBC%componentBC(field)%Mask(faceSet)) then numBC = numBC + 1 call ISCreateGeneral(PETSC_COMM_WORLD,1,[field-1],PETSC_COPY_VALUES,pbcComps(numBC),ierr) CHKERRQ(ierr) call DMGetStratumSize(mech_mesh,'Face Sets',mesh_boundaries(faceSet),bcSize,ierr) CHKERRQ(ierr) if (bcSize > 0) then call DMGetStratumIS(mech_mesh,'Face Sets',mesh_boundaries(faceSet),bcPoint,ierr) CHKERRQ(ierr) call ISGetIndicesF90(bcPoint,pBcPoint,ierr); CHKERRQ(ierr) call ISCreateGeneral(PETSC_COMM_WORLD,bcSize,pBcPoint,PETSC_COPY_VALUES,pbcPoints(numBC),ierr) CHKERRQ(ierr) call ISRestoreIndicesF90(bcPoint,pBcPoint,ierr); CHKERRQ(ierr) call ISDestroy(bcPoint,ierr); CHKERRQ(ierr) else call ISCreateGeneral(PETSC_COMM_WORLD,0,[0],PETSC_COPY_VALUES,pbcPoints(numBC),ierr) CHKERRQ(ierr) endif endif enddo; enddo #if (PETSC_VERSION_MINOR < 11) call DMPlexCreateSection(mech_mesh,dimPlex,1,pNumComp,pNumDof, & numBC,pBcField,pBcComps,pBcPoints,PETSC_NULL_IS,section,ierr) #else call DMPlexCreateSection(mech_mesh,nolabel,pNumComp,pNumDof, & numBC,pBcField,pBcComps,pBcPoints,PETSC_NULL_IS,section,ierr) #endif CHKERRQ(ierr) call DMSetSection(mech_mesh,section,ierr); CHKERRQ(ierr) do faceSet = 1, numBC call ISDestroy(pbcPoints(faceSet),ierr); CHKERRQ(ierr) enddo !-------------------------------------------------------------------------------------------------- ! initialize solver specific parts of PETSc call SNESCreate(PETSC_COMM_WORLD,mech_snes,ierr);CHKERRQ(ierr) call SNESSetOptionsPrefix(mech_snes,'mech_',ierr);CHKERRQ(ierr) call SNESSetDM(mech_snes,mech_mesh,ierr); CHKERRQ(ierr) !< set the mesh for non-linear solver call DMCreateGlobalVector(mech_mesh,solution ,ierr); CHKERRQ(ierr) !< locally owned displacement Dofs call DMCreateGlobalVector(mech_mesh,solution_rate ,ierr); CHKERRQ(ierr) !< locally owned velocity Dofs to guess solution at next load step call DMCreateLocalVector (mech_mesh,solution_local ,ierr); CHKERRQ(ierr) !< locally owned velocity Dofs to guess solution at next load step call DMSNESSetFunctionLocal(mech_mesh,FEM_mech_formResidual,PETSC_NULL_VEC,ierr) !< function to evaluate residual forces CHKERRQ(ierr) call DMSNESSetJacobianLocal(mech_mesh,FEM_mech_formJacobian,PETSC_NULL_VEC,ierr) !< function to evaluate stiffness matrix CHKERRQ(ierr) call SNESSetMaxLinearSolveFailures(mech_snes, huge(1), ierr); CHKERRQ(ierr) !< ignore linear solve failures call SNESSetConvergenceTest(mech_snes,FEM_mech_converged,PETSC_NULL_VEC,PETSC_NULL_FUNCTION,ierr) CHKERRQ(ierr) call SNESSetTolerances(mech_snes,1.0,0.0,0.0,num%itmax,num%itmax,ierr) CHKERRQ(ierr) call SNESSetFromOptions(mech_snes,ierr); CHKERRQ(ierr) !-------------------------------------------------------------------------------------------------- ! init fields call VecSet(solution ,0.0,ierr); CHKERRQ(ierr) call VecSet(solution_rate ,0.0,ierr); CHKERRQ(ierr) allocate(x_scal(cellDof)) allocate(nodalWeightsP(1)) allocate(nodalPointsP(dimPlex)) allocate(pv0(dimPlex)) allocate(pcellJ(dimPlex**2)) allocate(pinvcellJ(dimPlex**2)) allocate(cellJMat(dimPlex,dimPlex)) call PetscDSGetDiscretization(mechDS,0,mechFE,ierr) CHKERRQ(ierr) call PetscFEGetDualSpace(mechFE,mechDualSpace,ierr); CHKERRQ(ierr) call DMPlexGetHeightStratum(mech_mesh,0,cellStart,cellEnd,ierr) CHKERRQ(ierr) do cell = cellStart, cellEnd-1 !< loop over all elements x_scal = 0.0_pReal call DMPlexComputeCellGeometryAffineFEM(mech_mesh,cell,pV0,pCellJ,pInvcellJ,detJ,ierr) CHKERRQ(ierr) cellJMat = reshape(pCellJ,shape=[dimPlex,dimPlex]) do basis = 0, nBasis*dimPlex-1, dimPlex call PetscDualSpaceGetFunctional(mechDualSpace,basis,functional,ierr) CHKERRQ(ierr) call PetscQuadratureGetData(functional,dimPlex,nc,nNodalPoints,nodalPointsP,nodalWeightsP,ierr) CHKERRQ(ierr) x_scal(basis+1:basis+dimPlex) = pV0 + matmul(transpose(cellJMat),nodalPointsP + 1.0_pReal) enddo px_scal => x_scal #if (PETSC_VERSION_MINOR < 11) call DMPlexVecSetClosure(mech_mesh,section,solution_local,cell,px_scal,INSERT_ALL_VALUES,ierr) #else call DMPlexVecSetClosure(mech_mesh,section,solution_local,cell,px_scal,5,ierr) ! PETSc: cbee0a90b60958e5c50c89b1e41f4451dfa6008c #endif CHKERRQ(ierr) enddo end subroutine FEM_mech_init !-------------------------------------------------------------------------------------------------- !> @brief solution for the FEM load step !-------------------------------------------------------------------------------------------------- type(tSolutionState) function FEM_mech_solution( & incInfoIn,timeinc,timeinc_old,fieldBC) !-------------------------------------------------------------------------------------------------- ! input data for solution real(pReal), intent(in) :: & timeinc, & !< increment in time for current solution timeinc_old !< increment in time of last increment type(tFieldBC), intent(in) :: & fieldBC character(len=*), intent(in) :: & incInfoIn PetscErrorCode :: ierr SNESConvergedReason :: reason incInfo = incInfoIn FEM_mech_solution%converged =.false. !-------------------------------------------------------------------------------------------------- ! set module wide availabe data params%timeinc = timeinc params%timeincOld = timeinc_old params%fieldBC = fieldBC call SNESSolve(mech_snes,PETSC_NULL_VEC,solution,ierr); CHKERRQ(ierr) ! solve mech_snes based on solution guess (result in solution) call SNESGetConvergedReason(mech_snes,reason,ierr); CHKERRQ(ierr) ! solution converged? terminallyIll = .false. if (reason < 1) then ! 0: still iterating (will not occur), negative -> convergence error FEM_mech_solution%converged = .false. FEM_mech_solution%iterationsNeeded = num%itmax else ! >= 1 proper convergence (or terminally ill) FEM_mech_solution%converged = .true. call SNESGetIterationNumber(mech_snes,FEM_mech_solution%iterationsNeeded,ierr) CHKERRQ(ierr) endif write(6,'(/,a)') ' ===========================================================================' flush(6) end function FEM_mech_solution !-------------------------------------------------------------------------------------------------- !> @brief forms the FEM residual vector !-------------------------------------------------------------------------------------------------- subroutine FEM_mech_formResidual(dm_local,xx_local,f_local,dummy,ierr) DM :: dm_local PetscObject,intent(in) :: dummy PetscErrorCode :: ierr PetscDS :: prob Vec :: x_local, f_local, xx_local PetscSection :: section PetscScalar, dimension(:), pointer :: x_scal, pf_scal PetscScalar, target :: f_scal(cellDof) PetscReal :: detJ, IcellJMat(dimPlex,dimPlex) PetscReal, pointer,dimension(:) :: pV0, pCellJ, pInvcellJ, basisField, basisFieldDer PetscInt :: cellStart, cellEnd, cell, field, face, & qPt, basis, comp, cidx, & numFields PetscReal :: detFAvg PetscReal :: BMat(dimPlex*dimPlex,cellDof) PetscInt :: bcSize IS :: bcPoints allocate(pV0(dimPlex)) allocate(pcellJ(dimPlex**2)) allocate(pinvcellJ(dimPlex**2)) allocate(x_scal(cellDof)) #if (PETSC_VERSION_MINOR < 12) call DMGetSection(dm_local,section,ierr); CHKERRQ(ierr) #else call DMGetLocalSection(dm_local,section,ierr); CHKERRQ(ierr) #endif call DMGetDS(dm_local,prob,ierr); CHKERRQ(ierr) call PetscDSGetTabulation(prob,0,basisField,basisFieldDer,ierr) CHKERRQ(ierr) call DMPlexGetHeightStratum(dm_local,0,cellStart,cellEnd,ierr); CHKERRQ(ierr) call DMGetLocalVector(dm_local,x_local,ierr); CHKERRQ(ierr) call VecWAXPY(x_local,1.0,xx_local,solution_local,ierr); CHKERRQ(ierr) do field = 1, dimPlex; do face = 1, mesh_Nboundaries if (params%fieldBC%componentBC(field)%Mask(face)) then call DMGetStratumSize(dm_local,'Face Sets',mesh_boundaries(face),bcSize,ierr) if (bcSize > 0) then call DMGetStratumIS(dm_local,'Face Sets',mesh_boundaries(face),bcPoints,ierr) CHKERRQ(ierr) call utilities_projectBCValues(x_local,section,0,field-1,bcPoints, & 0.0_pReal,params%fieldBC%componentBC(field)%Value(face),params%timeinc) call ISDestroy(bcPoints,ierr); CHKERRQ(ierr) endif endif enddo; enddo !-------------------------------------------------------------------------------------------------- ! evaluate field derivatives do cell = cellStart, cellEnd-1 !< loop over all elements call PetscSectionGetNumFields(section,numFields,ierr) CHKERRQ(ierr) call DMPlexVecGetClosure(dm_local,section,x_local,cell,x_scal,ierr) !< get Dofs belonging to element CHKERRQ(ierr) call DMPlexComputeCellGeometryAffineFEM(dm_local,cell,pV0,pCellJ,pInvcellJ,detJ,ierr) CHKERRQ(ierr) IcellJMat = reshape(pInvcellJ,shape=[dimPlex,dimPlex]) do qPt = 0, nQuadrature-1 BMat = 0.0 do basis = 0, nBasis-1 do comp = 0, dimPlex-1 cidx = basis*dimPlex+comp BMat(comp*dimPlex+1:(comp+1)*dimPlex,basis*dimPlex+comp+1) = & matmul(IcellJMat,basisFieldDer((((qPt*nBasis + basis)*dimPlex + comp)*dimPlex+comp )*dimPlex+1: & (((qPt*nBasis + basis)*dimPlex + comp)*dimPlex+comp+1)*dimPlex)) enddo enddo materialpoint_F(1:dimPlex,1:dimPlex,qPt+1,cell+1) = & reshape(matmul(BMat,x_scal),shape=[dimPlex,dimPlex], order=[2,1]) enddo if (num%BBarStabilisation) then detFAvg = math_det33(sum(materialpoint_F(1:3,1:3,1:nQuadrature,cell+1),dim=3)/real(nQuadrature)) do qPt = 1, nQuadrature materialpoint_F(1:dimPlex,1:dimPlex,qPt,cell+1) = & materialpoint_F(1:dimPlex,1:dimPlex,qPt,cell+1)* & (detFAvg/math_det33(materialpoint_F(1:3,1:3,qPt,cell+1)))**(1.0/real(dimPlex)) enddo endif call DMPlexVecRestoreClosure(dm_local,section,x_local,cell,x_scal,ierr) CHKERRQ(ierr) enddo !-------------------------------------------------------------------------------------------------- ! evaluate constitutive response call Utilities_constitutiveResponse(params%timeinc,P_av,ForwardData) call MPI_Allreduce(MPI_IN_PLACE,terminallyIll,1,MPI_LOGICAL,MPI_LOR,PETSC_COMM_WORLD,ierr) ForwardData = .false. !-------------------------------------------------------------------------------------------------- ! integrating residual do cell = cellStart, cellEnd-1 !< loop over all elements call DMPlexVecGetClosure(dm_local,section,x_local,cell,x_scal,ierr) !< get Dofs belonging to element CHKERRQ(ierr) call DMPlexComputeCellGeometryAffineFEM(dm_local,cell,pV0,pCellJ,pInvcellJ,detJ,ierr) CHKERRQ(ierr) IcellJMat = reshape(pInvcellJ,shape=[dimPlex,dimPlex]) f_scal = 0.0 do qPt = 0, nQuadrature-1 BMat = 0.0 do basis = 0, nBasis-1 do comp = 0, dimPlex-1 cidx = basis*dimPlex+comp BMat(comp*dimPlex+1:(comp+1)*dimPlex,basis*dimPlex+comp+1) = & matmul(IcellJMat,basisFieldDer((((qPt*nBasis + basis)*dimPlex + comp)*dimPlex+comp )*dimPlex+1: & (((qPt*nBasis + basis)*dimPlex + comp)*dimPlex+comp+1)*dimPlex)) enddo enddo f_scal = f_scal + & matmul(transpose(BMat), & reshape(transpose(materialpoint_P(1:dimPlex,1:dimPlex,qPt+1,cell+1)), & shape=[dimPlex*dimPlex]))*qWeights(qPt+1) enddo f_scal = f_scal*abs(detJ) pf_scal => f_scal call DMPlexVecSetClosure(dm_local,section,f_local,cell,pf_scal,ADD_VALUES,ierr) CHKERRQ(ierr) call DMPlexVecRestoreClosure(dm_local,section,x_local,cell,x_scal,ierr) CHKERRQ(ierr) enddo call DMRestoreLocalVector(dm_local,x_local,ierr); CHKERRQ(ierr) end subroutine FEM_mech_formResidual !-------------------------------------------------------------------------------------------------- !> @brief forms the FEM stiffness matrix !-------------------------------------------------------------------------------------------------- subroutine FEM_mech_formJacobian(dm_local,xx_local,Jac_pre,Jac,dummy,ierr) DM :: dm_local Mat :: Jac_pre, Jac PetscObject, intent(in) :: dummy PetscErrorCode :: ierr PetscDS :: prob Vec :: x_local, xx_local PetscSection :: section, gSection PetscReal, dimension(1, cellDof) :: MatB PetscReal, dimension(dimPlex**2,cellDof) :: BMat, BMatAvg, MatA PetscReal, dimension(3,3) :: F, FAvg, FInv PetscReal :: detJ PetscReal, dimension(:), pointer :: basisField, basisFieldDer, & pV0, pCellJ, pInvcellJ PetscScalar, dimension(:), pointer :: pK_e, x_scal PetscScalar,dimension(cellDOF,cellDOF), target :: K_e PetscScalar,dimension(cellDOF,cellDOF) :: K_eA , & K_eB PetscInt :: cellStart, cellEnd, cell, field, face, & qPt, basis, comp, cidx,bcSize IS :: bcPoints allocate(pV0(dimPlex)) allocate(pcellJ(dimPlex**2)) allocate(pinvcellJ(dimPlex**2)) call MatSetOption(Jac,MAT_KEEP_NONZERO_PATTERN,PETSC_TRUE,ierr); CHKERRQ(ierr) call MatSetOption(Jac,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_FALSE,ierr); CHKERRQ(ierr) call MatZeroEntries(Jac,ierr); CHKERRQ(ierr) call DMGetDS(dm_local,prob,ierr); CHKERRQ(ierr) call PetscDSGetTabulation(prob,0,basisField,basisFieldDer,ierr) #if (PETSC_VERSION_MINOR < 12) call DMGetSection(dm_local,section,ierr); CHKERRQ(ierr) #else call DMGetLocalSection(dm_local,section,ierr); CHKERRQ(ierr) #endif call DMGetGlobalSection(dm_local,gSection,ierr); CHKERRQ(ierr) call DMGetLocalVector(dm_local,x_local,ierr); CHKERRQ(ierr) call VecWAXPY(x_local,1.0_pReal,xx_local,solution_local,ierr); CHKERRQ(ierr) do field = 1, dimPlex; do face = 1, mesh_Nboundaries if (params%fieldBC%componentBC(field)%Mask(face)) then call DMGetStratumSize(dm_local,'Face Sets',mesh_boundaries(face),bcSize,ierr) if (bcSize > 0) then call DMGetStratumIS(dm_local,'Face Sets',mesh_boundaries(face),bcPoints,ierr) CHKERRQ(ierr) call utilities_projectBCValues(x_local,section,0,field-1,bcPoints, & 0.0_pReal,params%fieldBC%componentBC(field)%Value(face),params%timeinc) call ISDestroy(bcPoints,ierr); CHKERRQ(ierr) endif endif enddo; enddo call DMPlexGetHeightStratum(dm_local,0,cellStart,cellEnd,ierr); CHKERRQ(ierr) do cell = cellStart, cellEnd-1 !< loop over all elements call DMPlexVecGetClosure(dm_local,section,x_local,cell,x_scal,ierr) !< get Dofs belonging to element CHKERRQ(ierr) call DMPlexComputeCellGeometryAffineFEM(dm_local,cell,pV0,pCellJ,pInvcellJ,detJ,ierr) CHKERRQ(ierr) K_eA = 0.0 K_eB = 0.0 MatB = 0.0 FAvg = 0.0 BMatAvg = 0.0 do qPt = 0, nQuadrature-1 BMat = 0.0 do basis = 0, nBasis-1 do comp = 0, dimPlex-1 cidx = basis*dimPlex+comp BMat(comp*dimPlex+1:(comp+1)*dimPlex,basis*dimPlex+comp+1) = & matmul( reshape(pInvcellJ, shape = [dimPlex,dimPlex]),& basisFieldDer((((qPt*nBasis + basis)*dimPlex + comp)*dimPlex+comp )*dimPlex+1: & (((qPt*nBasis + basis)*dimPlex + comp)*dimPlex+comp+1)*dimPlex)) enddo enddo MatA = matmul(reshape(reshape(materialpoint_dPdF(1:dimPlex,1:dimPlex,1:dimPlex,1:dimPlex,qPt+1,cell+1), & shape=[dimPlex,dimPlex,dimPlex,dimPlex], order=[2,1,4,3]), & shape=[dimPlex*dimPlex,dimPlex*dimPlex]),BMat)*qWeights(qPt+1) if (num%BBarStabilisation) then F(1:dimPlex,1:dimPlex) = reshape(matmul(BMat,x_scal),shape=[dimPlex,dimPlex]) FInv = math_inv33(F) K_eA = K_eA + matmul(transpose(BMat),MatA)*math_det33(FInv)**(1.0/real(dimPlex)) K_eB = K_eB - & matmul(transpose(matmul(reshape(materialpoint_F(1:dimPlex,1:dimPlex,qPt+1,cell+1), & shape=[dimPlex*dimPlex,1]), & matmul(reshape(FInv(1:dimPlex,1:dimPlex), & shape=[1,dimPlex*dimPlex],order=[2,1]),BMat))),MatA) MatB = MatB + & matmul(reshape(materialpoint_F(1:dimPlex,1:dimPlex,qPt+1,cell+1),shape=[1,dimPlex*dimPlex]),MatA) FAvg = FAvg + F BMatAvg = BMatAvg + BMat else K_eA = K_eA + matmul(transpose(BMat),MatA) endif enddo if (num%BBarStabilisation) then FInv = math_inv33(FAvg) K_e = K_eA*math_det33(FAvg/real(nQuadrature))**(1.0/real(dimPlex)) + & (matmul(matmul(transpose(BMatAvg), & reshape(FInv(1:dimPlex,1:dimPlex),shape=[dimPlex*dimPlex,1],order=[2,1])),MatB) + & K_eB)/real(dimPlex) else K_e = K_eA endif K_e = (K_e + eps*math_identity2nd(cellDof)) * abs(detJ) #ifndef __INTEL_COMPILER pK_e(1:cellDOF**2) => K_e #else ! https://software.intel.com/en-us/forums/intel-fortran-compiler/topic/782230 (bug) allocate(pK_e(cellDOF**2),source = reshape(K_e,[cellDOF**2])) #endif call DMPlexMatSetClosure(dm_local,section,gSection,Jac,cell,pK_e,ADD_VALUES,ierr) CHKERRQ(ierr) call DMPlexVecRestoreClosure(dm_local,section,x_local,cell,x_scal,ierr) CHKERRQ(ierr) enddo call MatAssemblyBegin(Jac,MAT_FINAL_ASSEMBLY,ierr); CHKERRQ(ierr) call MatAssemblyEnd(Jac,MAT_FINAL_ASSEMBLY,ierr); CHKERRQ(ierr) call MatAssemblyBegin(Jac_pre,MAT_FINAL_ASSEMBLY,ierr); CHKERRQ(ierr) call MatAssemblyEnd(Jac_pre,MAT_FINAL_ASSEMBLY,ierr); CHKERRQ(ierr) call DMRestoreLocalVector(dm_local,x_local,ierr); CHKERRQ(ierr) !-------------------------------------------------------------------------------------------------- ! apply boundary conditions call DMPlexCreateRigidBody(dm_local,matnull,ierr); CHKERRQ(ierr) call MatSetNullSpace(Jac,matnull,ierr); CHKERRQ(ierr) call MatSetNearNullSpace(Jac,matnull,ierr); CHKERRQ(ierr) call MatNullSpaceDestroy(matnull,ierr); CHKERRQ(ierr) end subroutine FEM_mech_formJacobian !-------------------------------------------------------------------------------------------------- !> @brief forwarding routine !-------------------------------------------------------------------------------------------------- subroutine FEM_mech_forward(guess,timeinc,timeinc_old,fieldBC) type(tFieldBC), intent(in) :: & fieldBC real(pReal), intent(in) :: & timeinc_old, & timeinc logical, intent(in) :: & guess PetscInt :: field, face, bcSize DM :: dm_local Vec :: x_local PetscSection :: section IS :: bcPoints PetscErrorCode :: ierr !-------------------------------------------------------------------------------------------------- ! forward last inc if (guess .and. .not. cutBack) then ForwardData = .True. materialpoint_F0 = materialpoint_F call SNESGetDM(mech_snes,dm_local,ierr); CHKERRQ(ierr) !< retrieve mesh info from mech_snes into dm_local call DMGetSection(dm_local,section,ierr); CHKERRQ(ierr) call DMGetLocalVector(dm_local,x_local,ierr); CHKERRQ(ierr) call VecSet(x_local,0.0_pReal,ierr); CHKERRQ(ierr) call DMGlobalToLocalBegin(dm_local,solution,INSERT_VALUES,x_local,ierr) !< retrieve my partition of global solution vector CHKERRQ(ierr) call DMGlobalToLocalEnd(dm_local,solution,INSERT_VALUES,x_local,ierr) CHKERRQ(ierr) call VecAXPY(solution_local,1.0,x_local,ierr); CHKERRQ(ierr) do field = 1, dimPlex; do face = 1, mesh_Nboundaries if (fieldBC%componentBC(field)%Mask(face)) then call DMGetStratumSize(dm_local,'Face Sets',mesh_boundaries(face),bcSize,ierr) if (bcSize > 0) then call DMGetStratumIS(dm_local,'Face Sets',mesh_boundaries(face),bcPoints,ierr) CHKERRQ(ierr) call utilities_projectBCValues(solution_local,section,0,field-1,bcPoints, & 0.0_pReal,fieldBC%componentBC(field)%Value(face),timeinc_old) call ISDestroy(bcPoints,ierr); CHKERRQ(ierr) endif endif enddo; enddo call DMRestoreLocalVector(dm_local,x_local,ierr); CHKERRQ(ierr) !-------------------------------------------------------------------------------------------------- ! update rate and forward last inc call VecCopy(solution,solution_rate,ierr); CHKERRQ(ierr) call VecScale(solution_rate,1.0/timeinc_old,ierr); CHKERRQ(ierr) endif call VecCopy(solution_rate,solution,ierr); CHKERRQ(ierr) call VecScale(solution,timeinc,ierr); CHKERRQ(ierr) end subroutine FEM_mech_forward !-------------------------------------------------------------------------------------------------- !> @brief reporting !-------------------------------------------------------------------------------------------------- subroutine FEM_mech_converged(snes_local,PETScIter,xnorm,snorm,fnorm,reason,dummy,ierr) SNES :: snes_local PetscInt :: PETScIter PetscReal :: xnorm,snorm,fnorm,divTol SNESConvergedReason :: reason PetscObject :: dummy PetscErrorCode :: ierr !-------------------------------------------------------------------------------------------------- ! report divTol = max(maxval(abs(P_av(1:dimPlex,1:dimPlex)))*num%eps_struct_rtol,num%eps_struct_atol) call SNESConvergedDefault(snes_local,PETScIter,xnorm,snorm,fnorm/divTol,reason,dummy,ierr) CHKERRQ(ierr) if (terminallyIll) reason = SNES_DIVERGED_FUNCTION_DOMAIN write(6,'(1/,1x,a,a,i0,a,i0,f0.3)') trim(incInfo), & ' @ Iteration ',PETScIter,' mechanical residual norm = ', & int(fnorm/divTol),fnorm/divTol-int(fnorm/divTol) write(6,'(/,a,/,3(3(2x,f12.4,1x)/))',advance='no') ' Piola--Kirchhoff stress / MPa =',& transpose(P_av)*1.e-6_pReal flush(6) end subroutine FEM_mech_converged end module mesh_mech_FEM