!-------------------------------------------------------------------------------------------------- !> @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 Driver controlling inner and outer load case looping of the FEM solver !> @details doing cutbacking, reporting statistics, writing !> results !-------------------------------------------------------------------------------------------------- program DAMASK_mesh #include use PetscDM use prec use DAMASK_interface use parallelization use IO use math use CPFEM2 use config use discretization_mesh use FEM_Utilities use mesh_mechanical_FEM implicit none type :: tLoadCase real(pReal) :: time = 0.0_pReal !< length of increment integer :: incs = 0, & !< number of increments outputfrequency = 1 !< frequency of result writes logical :: followFormerTrajectory = .true. !< follow trajectory of former loadcase integer, allocatable, dimension(:) :: faceID type(tFieldBC), allocatable, dimension(:) :: fieldBC end type tLoadCase !-------------------------------------------------------------------------------------------------- ! variables related to information from load case and geom file integer, allocatable, dimension(:) :: chunkPos ! this is longer than needed for geometry parsing integer :: & N_def = 0 !< # of rate of deformation specifiers found in load case file character(len=:), allocatable :: & line !-------------------------------------------------------------------------------------------------- ! loop variables, convergence etc. integer, parameter :: & subStepFactor = 2 !< for each substep, divide the last time increment by 2.0 real(pReal) :: & time = 0.0_pReal, & !< elapsed time time0 = 0.0_pReal, & !< begin of interval timeinc = 0.0_pReal, & !< current time interval timeIncOld = 0.0_pReal, & !< previous time interval remainingLoadCaseTime = 0.0_pReal !< remaining time of current load case logical :: & guess, & !< guess along former trajectory stagIterate integer :: & l, & i, & errorID, & cutBackLevel = 0, & !< cut back level \f$ t = \frac{t_{inc}}{2^l} \f$ stepFraction = 0, & !< fraction of current time interval currentLoadcase = 0, & !< current load case currentFace = 0, & inc, & !< current increment in current load case totalIncsCounter = 0, & !< total # of increments statUnit = 0, & !< file unit for statistics output stagIter, & component class(tNode), pointer :: & num_mesh character(len=pStringLen), dimension(:), allocatable :: fileContent character(len=pStringLen) :: & incInfo, & loadcase_string integer :: & stagItMax, & !< max number of field level staggered iterations maxCutBack !< max number of cutbacks type(tLoadCase), allocatable, dimension(:) :: loadCases !< array of all load cases type(tSolutionState), allocatable, dimension(:) :: solres PetscInt :: faceSet, currentFaceSet, dimPlex PetscErrorCode :: ierr integer(kind(COMPONENT_UNDEFINED_ID)) :: ID external :: & quit !-------------------------------------------------------------------------------------------------- ! init DAMASK (all modules) call CPFEM_initAll print'(/,a)', ' <<<+- DAMASK_mesh init -+>>>'; flush(IO_STDOUT) !--------------------------------------------------------------------- ! reading field information from numerics file and do sanity checks num_mesh => config_numerics%get('mesh', defaultVal=emptyDict) stagItMax = num_mesh%get_asInt('maxStaggeredIter',defaultVal=10) maxCutBack = num_mesh%get_asInt('maxCutBack',defaultVal=3) if (stagItMax < 0) call IO_error(301,ext_msg='maxStaggeredIter') if (maxCutBack < 0) call IO_error(301,ext_msg='maxCutBack') ! reading basic information from load case file and allocate data structure containing load cases call DMGetDimension(geomMesh,dimPlex,ierr) !< dimension of mesh (2D or 3D) CHKERRA(ierr) allocate(solres(1)) !-------------------------------------------------------------------------------------------------- ! reading basic information from load case file and allocate data structure containing load cases fileContent = IO_readlines(trim(interface_loadFile)) do l = 1, size(fileContent) line = fileContent(l) if (IO_isBlank(line)) cycle ! skip empty lines chunkPos = IO_stringPos(line) do i = 1, chunkPos(1) ! reading compulsory parameters for loadcase select case (IO_stringValue(line,chunkPos,i)) case('$Loadcase') N_def = N_def + 1 end select enddo ! count all identifiers to allocate memory and do sanity check enddo if(N_def < 1) call IO_error(error_ID = 837) allocate(loadCases(N_def)) do i = 1, size(loadCases) allocate(loadCases(i)%fieldBC(1)) loadCases(i)%fieldBC(1)%ID = FIELD_MECH_ID enddo do i = 1, size(loadCases) loadCases(i)%fieldBC(1)%nComponents = dimPlex !< X, Y (, Z) displacements allocate(loadCases(i)%fieldBC(1)%componentBC(loadCases(i)%fieldBC(1)%nComponents)) do component = 1, loadCases(i)%fieldBC(1)%nComponents select case (component) case (1) loadCases(i)%fieldBC(1)%componentBC(component)%ID = COMPONENT_MECH_X_ID case (2) loadCases(i)%fieldBC(1)%componentBC(component)%ID = COMPONENT_MECH_Y_ID case (3) loadCases(i)%fieldBC(1)%componentBC(component)%ID = COMPONENT_MECH_Z_ID end select enddo do component = 1, loadCases(i)%fieldBC(1)%nComponents allocate(loadCases(i)%fieldBC(1)%componentBC(component)%Value(mesh_Nboundaries), source = 0.0_pReal) allocate(loadCases(i)%fieldBC(1)%componentBC(component)%Mask (mesh_Nboundaries), source = .false.) enddo enddo !-------------------------------------------------------------------------------------------------- ! reading the load case and assign values to the allocated data structure do l = 1, size(fileContent) line = fileContent(l) if (IO_isBlank(line)) cycle ! skip empty lines chunkPos = IO_stringPos(line) do i = 1, chunkPos(1) select case (IO_stringValue(line,chunkPos,i)) !-------------------------------------------------------------------------------------------------- ! loadcase information case('$Loadcase') currentLoadCase = IO_intValue(line,chunkPos,i+1) case('Face') currentFace = IO_intValue(line,chunkPos,i+1) currentFaceSet = -1 do faceSet = 1, mesh_Nboundaries if (mesh_boundaries(faceSet) == currentFace) currentFaceSet = faceSet enddo if (currentFaceSet < 0) call IO_error(error_ID = 837, ext_msg = 'invalid BC') case('t') loadCases(currentLoadCase)%time = IO_floatValue(line,chunkPos,i+1) case('N') loadCases(currentLoadCase)%incs = IO_intValue(line,chunkPos,i+1) case('f_out') loadCases(currentLoadCase)%outputfrequency = IO_intValue(line,chunkPos,i+1) case('estimate_rate') loadCases(currentLoadCase)%followFormerTrajectory = .false. ! do not continue to predict deformation along former trajectory !-------------------------------------------------------------------------------------------------- ! boundary condition information case('X','Y','Z') select case(IO_stringValue(line,chunkPos,i)) case('X') ID = COMPONENT_MECH_X_ID case('Y') ID = COMPONENT_MECH_Y_ID case('Z') ID = COMPONENT_MECH_Z_ID end select do component = 1, loadcases(currentLoadCase)%fieldBC(1)%nComponents if (loadCases(currentLoadCase)%fieldBC(1)%componentBC(component)%ID == ID) then loadCases(currentLoadCase)%fieldBC(1)%componentBC(component)%Mask (currentFaceSet) = & .true. loadCases(currentLoadCase)%fieldBC(1)%componentBC(component)%Value(currentFaceSet) = & IO_floatValue(line,chunkPos,i+1) endif enddo end select enddo enddo !-------------------------------------------------------------------------------------------------- ! consistency checks and output of load case loadCases(1)%followFormerTrajectory = .false. ! cannot guess along trajectory for first inc of first currentLoadCase errorID = 0 checkLoadcases: do currentLoadCase = 1, size(loadCases) write (loadcase_string, '(i0)' ) currentLoadCase print'(a,i0)', ' load case: ', currentLoadCase if (.not. loadCases(currentLoadCase)%followFormerTrajectory) & print'(a)', ' drop guessing along trajectory' print'(a)', ' Field '//trim(FIELD_MECH_label) do faceSet = 1, mesh_Nboundaries do component = 1, loadCases(currentLoadCase)%fieldBC(1)%nComponents if (loadCases(currentLoadCase)%fieldBC(1)%componentBC(component)%Mask(faceSet)) & print'(a,i2,a,i2,a,f12.7)', ' Face ', mesh_boundaries(faceSet), & ' Component ', component, & ' Value ', loadCases(currentLoadCase)%fieldBC(1)% & componentBC(component)%Value(faceSet) enddo enddo print'(a,f12.6)', ' time: ', loadCases(currentLoadCase)%time if (loadCases(currentLoadCase)%incs < 1) errorID = 835 ! non-positive incs count print'(a,i5)', ' increments: ', loadCases(currentLoadCase)%incs if (loadCases(currentLoadCase)%outputfrequency < 1) errorID = 836 ! non-positive result frequency print'(a,i5)', ' output frequency: ', & loadCases(currentLoadCase)%outputfrequency if (errorID > 0) call IO_error(error_ID = errorID, ext_msg = loadcase_string) ! exit with error message enddo checkLoadcases !-------------------------------------------------------------------------------------------------- ! doing initialization depending on active solvers call FEM_Utilities_init call FEM_mechanical_init(loadCases(1)%fieldBC(1)) if (worldrank == 0) then open(newunit=statUnit,file=trim(getSolverJobName())//'.sta',form='FORMATTED',status='REPLACE') write(statUnit,'(a)') 'Increment Time CutbackLevel Converged IterationsNeeded' ! statistics file endif print'(/,a)', ' ... writing initial configuration to file ........................' flush(IO_STDOUT) call CPFEM_results(0,0.0_pReal) loadCaseLooping: do currentLoadCase = 1, size(loadCases) time0 = time ! load case start time guess = loadCases(currentLoadCase)%followFormerTrajectory ! change of load case? homogeneous guess for the first inc incLooping: do inc = 1, loadCases(currentLoadCase)%incs totalIncsCounter = totalIncsCounter + 1 !-------------------------------------------------------------------------------------------------- ! forwarding time timeIncOld = timeinc ! last timeinc that brought former inc to an end timeinc = loadCases(currentLoadCase)%time/real(loadCases(currentLoadCase)%incs,pReal) timeinc = timeinc * real(subStepFactor,pReal)**real(-cutBackLevel,pReal) ! depending on cut back level, decrease time step stepFraction = 0 ! fraction scaled by stepFactor**cutLevel subStepLooping: do while (stepFraction < subStepFactor**cutBackLevel) remainingLoadCaseTime = loadCases(currentLoadCase)%time+time0 - time time = time + timeinc ! forward target time stepFraction = stepFraction + 1 ! count step !-------------------------------------------------------------------------------------------------- ! report begin of new step print'(/,a)', ' ###########################################################################' print'(1x,a,es12.5,6(a,i0))',& 'Time', time, & 's: Increment ', inc, '/', loadCases(currentLoadCase)%incs,& '-', stepFraction, '/', subStepFactor**cutBackLevel,& ' of load case ', currentLoadCase,'/',size(loadCases) write(incInfo,'(4(a,i0))') & 'Increment ',totalIncsCounter,'/',sum(loadCases%incs),& '-',stepFraction, '/', subStepFactor**cutBackLevel flush(IO_STDOUT) call FEM_mechanical_forward(guess,timeinc,timeIncOld,loadCases(currentLoadCase)%fieldBC(1)) !-------------------------------------------------------------------------------------------------- ! solve fields stagIter = 0 stagIterate = .true. do while (stagIterate) solres(1) = FEM_mechanical_solution(incInfo,timeinc,timeIncOld,loadCases(currentLoadCase)%fieldBC(1)) if(.not. solres(1)%converged) exit stagIter = stagIter + 1 stagIterate = stagIter < stagItMax & .and. all(solres(:)%converged) & .and. .not. all(solres(:)%stagConverged) ! stationary with respect to staggered iteration enddo ! check solution cutBack = .False. if(.not. all(solres(:)%converged .and. solres(:)%stagConverged)) then ! no solution found if (cutBackLevel < maxCutBack) then ! do cut back cutBack = .True. stepFraction = (stepFraction - 1) * subStepFactor ! adjust to new denominator cutBackLevel = cutBackLevel + 1 time = time - timeinc ! rewind time timeinc = timeinc/2.0_pReal print'(/,a)', ' cutting back' else ! default behavior, exit if spectral solver does not converge if (worldrank == 0) close(statUnit) call IO_error(950) endif else guess = .true. ! start guessing after first converged (sub)inc timeIncOld = timeinc endif if (.not. cutBack .and. worldrank == 0) & write(statUnit,*) totalIncsCounter, time, cutBackLevel, & solres%converged, solres%iterationsNeeded ! write statistics about accepted solution enddo subStepLooping cutBackLevel = max(0, cutBackLevel - 1) ! try half number of subincs next inc if (all(solres(:)%converged)) then print'(/,a,i0,a)', ' increment ', totalIncsCounter, ' converged' else print'(/,a,i0,a)', ' increment ', totalIncsCounter, ' NOT converged' endif; flush(IO_STDOUT) if (mod(inc,loadCases(currentLoadCase)%outputFrequency) == 0) then ! at output frequency print'(/,a)', ' ... writing results to file ......................................' call FEM_mechanical_updateCoords call CPFEM_results(totalIncsCounter,time) endif enddo incLooping enddo loadCaseLooping !-------------------------------------------------------------------------------------------------- ! report summary of whole calculation print'(/,a)', ' ###########################################################################' if (worldrank == 0) close(statUnit) call quit(0) ! no complains ;) end program DAMASK_mesh