!-------------------------------------------------------------------------------------------------- !> @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, forwarding in case of restart, reporting statistics, writing !> results !-------------------------------------------------------------------------------------------------- program DAMASK_FEM #include use PetscDM use prec use DAMASK_interface use IO use math use CPFEM2 use FEsolving use numerics use mesh use FEM_Utilities use FEM_mech implicit none !-------------------------------------------------------------------------------------------------- ! 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=65536) :: & 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 :: & i, & errorID, & cutBackLevel = 0, & !< cut back level \f$ t = \frac{t_{inc}}{2^l} \f$ stepFraction = 0 !< fraction of current time interval integer :: & currentLoadcase = 0, & !< current load case currentFace = 0, & inc, & !< current increment in current load case totalIncsCounter = 0, & !< total # of increments convergedCounter = 0, & !< # of converged increments notConvergedCounter = 0, & !< # of non-converged increments fileUnit = 0, & !< file unit for reading load case and writing results myStat, & statUnit = 0, & !< file unit for statistics output lastRestartWritten = 0, & !< total increment No. at which last restart information was written stagIter, & component character(len=6) :: loadcase_string character(len=1024) :: & incInfo type(tLoadCase), allocatable, dimension(:) :: loadCases !< array of all load cases type(tSolutionState), allocatable, dimension(:) :: solres PetscInt :: faceSet, currentFaceSet PetscInt :: field, dimPlex PetscErrorCode :: ierr external :: & quit !-------------------------------------------------------------------------------------------------- ! init DAMASK (all modules) call CPFEM_initAll write(6,'(/,a)') ' <<<+- DAMASK_FEM init -+>>>' ! reading basic information from load case file and allocate data structure containing load cases call DMGetDimension(geomMesh,dimPlex,ierr); CHKERRA(ierr) !< dimension of mesh (2D or 3D) nActiveFields = 1 allocate(solres(nActiveFields)) !-------------------------------------------------------------------------------------------------- ! reading basic information from load case file and allocate data structure containing load cases open(newunit=fileunit,iostat=myStat,file=trim(loadCaseFile),action='read') if (myStat /= 0) call IO_error(100,el=myStat,ext_msg=trim(loadCaseFile)) do read(fileUnit, '(A)', iostat=myStat) line if ( myStat /= 0) exit 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_lc(IO_stringValue(line,chunkPos,i))) case('$loadcase') N_def = N_def + 1 end select enddo ! count all identifiers to allocate memory and do sanity check enddo allocate (loadCases(N_def)) do i = 1, size(loadCases) allocate(loadCases(i)%fieldBC(nActiveFields)) field = 1 loadCases(i)%fieldBC(field)%ID = FIELD_MECH_ID enddo do i = 1, size(loadCases) do field = 1, nActiveFields select case (loadCases(i)%fieldBC(field)%ID) case(FIELD_MECH_ID) loadCases(i)%fieldBC(field)%nComponents = dimPlex !< X, Y (, Z) displacements allocate(loadCases(i)%fieldBC(field)%componentBC(loadCases(i)%fieldBC(field)%nComponents)) do component = 1, loadCases(i)%fieldBC(field)%nComponents select case (component) case (1) loadCases(i)%fieldBC(field)%componentBC(component)%ID = COMPONENT_MECH_X_ID case (2) loadCases(i)%fieldBC(field)%componentBC(component)%ID = COMPONENT_MECH_Y_ID case (3) loadCases(i)%fieldBC(field)%componentBC(component)%ID = COMPONENT_MECH_Z_ID end select enddo end select do component = 1, loadCases(i)%fieldBC(field)%nComponents allocate(loadCases(i)%fieldBC(field)%componentBC(component)%Value(mesh_Nboundaries), source = 0.0_pReal) allocate(loadCases(i)%fieldBC(field)%componentBC(component)%Mask (mesh_Nboundaries), source = .false.) enddo enddo enddo !-------------------------------------------------------------------------------------------------- ! reading the load case and assign values to the allocated data structure rewind(fileUnit) do read(fileUnit, '(A)', iostat=myStat) line if ( myStat /= 0) exit if (IO_isBlank(line)) cycle ! skip empty lines chunkPos = IO_stringPos(line) do i = 1, chunkPos(1) select case (IO_lc(IO_stringValue(line,chunkPos,i))) !-------------------------------------------------------------------------------------------------- ! loadcase information case('$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 = errorID, ext_msg = 'invalid BC') case('t','time','delta') ! increment time loadCases(currentLoadCase)%time = IO_floatValue(line,chunkPos,i+1) case('n','incs','increments','steps') ! number of increments loadCases(currentLoadCase)%incs = IO_intValue(line,chunkPos,i+1) case('logincs','logincrements','logsteps') ! number of increments (switch to log time scaling) loadCases(currentLoadCase)%incs = IO_intValue(line,chunkPos,i+1) loadCases(currentLoadCase)%logscale = 1 case('freq','frequency','outputfreq') ! frequency of result writings loadCases(currentLoadCase)%outputfrequency = IO_intValue(line,chunkPos,i+1) case('r','restart','restartwrite') ! frequency of writing restart information loadCases(currentLoadCase)%restartfrequency = & max(0,IO_intValue(line,chunkPos,i+1)) case('guessreset','dropguessing') loadCases(currentLoadCase)%followFormerTrajectory = .false. ! do not continue to predict deformation along former trajectory !-------------------------------------------------------------------------------------------------- ! boundary condition information case('x') ! X displacement field do field = 1, nActiveFields if (loadCases(currentLoadCase)%fieldBC(field)%ID == FIELD_MECH_ID) then do component = 1, loadcases(currentLoadCase)%fieldBC(field)%nComponents if (loadCases(currentLoadCase)%fieldBC(field)%componentBC(component)%ID == COMPONENT_MECH_X_ID) then loadCases(currentLoadCase)%fieldBC(field)%componentBC(component)%Mask (currentFaceSet) = & .true. loadCases(currentLoadCase)%fieldBC(field)%componentBC(component)%Value(currentFaceSet) = & IO_floatValue(line,chunkPos,i+1) endif enddo endif enddo case('y') ! Y displacement field do field = 1, nActiveFields if (loadCases(currentLoadCase)%fieldBC(field)%ID == FIELD_MECH_ID) then do component = 1, loadcases(currentLoadCase)%fieldBC(field)%nComponents if (loadCases(currentLoadCase)%fieldBC(field)%componentBC(component)%ID == COMPONENT_MECH_Y_ID) then loadCases(currentLoadCase)%fieldBC(field)%componentBC(component)%Mask (currentFaceSet) = & .true. loadCases(currentLoadCase)%fieldBC(field)%componentBC(component)%Value(currentFaceSet) = & IO_floatValue(line,chunkPos,i+1) endif enddo endif enddo case('z') ! Z displacement field do field = 1, nActiveFields if (loadCases(currentLoadCase)%fieldBC(field)%ID == FIELD_MECH_ID) then do component = 1, loadcases(currentLoadCase)%fieldBC(field)%nComponents if (loadCases(currentLoadCase)%fieldBC(field)%componentBC(component)%ID == COMPONENT_MECH_Z_ID) then loadCases(currentLoadCase)%fieldBC(field)%componentBC(component)%Mask (currentFaceSet) = & .true. loadCases(currentLoadCase)%fieldBC(field)%componentBC(component)%Value(currentFaceSet) = & IO_floatValue(line,chunkPos,i+1) endif enddo endif enddo end select enddo; enddo close(fileUnit) !-------------------------------------------------------------------------------------------------- ! 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, '(i6)' ) currentLoadCase write(6,'(1x,a,i6)') 'load case: ', currentLoadCase if (.not. loadCases(currentLoadCase)%followFormerTrajectory) & write(6,'(2x,a)') 'drop guessing along trajectory' do field = 1, nActiveFields select case (loadCases(currentLoadCase)%fieldBC(field)%ID) case(FIELD_MECH_ID) write(6,'(2x,a)') 'Field '//trim(FIELD_MECH_label) end select do faceSet = 1, mesh_Nboundaries do component = 1, loadCases(currentLoadCase)%fieldBC(field)%nComponents if (loadCases(currentLoadCase)%fieldBC(field)%componentBC(component)%Mask(faceSet)) & write(6,'(4x,a,i2,a,i2,a,f12.7)') 'Face ', mesh_boundaries(faceSet), & ' Component ', component, & ' Value ', loadCases(currentLoadCase)%fieldBC(field)% & componentBC(component)%Value(faceSet) enddo enddo enddo write(6,'(2x,a,f12.6)') 'time: ', loadCases(currentLoadCase)%time if (loadCases(currentLoadCase)%incs < 1) errorID = 835 ! non-positive incs count write(6,'(2x,a,i5)') 'increments: ', loadCases(currentLoadCase)%incs if (loadCases(currentLoadCase)%outputfrequency < 1) errorID = 836 ! non-positive result frequency write(6,'(2x,a,i5)') 'output frequency: ', & loadCases(currentLoadCase)%outputfrequency write(6,'(2x,a,i5,/)') 'restart frequency: ', & loadCases(currentLoadCase)%restartfrequency 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 Utilities_init do field = 1, nActiveFields select case (loadCases(1)%fieldBC(field)%ID) case(FIELD_MECH_ID) call FEM_mech_init(loadCases(1)%fieldBC(field)) end select enddo 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 if (loadCases(currentLoadCase)%logscale == 0) then ! linear scale timeinc = loadCases(currentLoadCase)%time/real(loadCases(currentLoadCase)%incs,pReal) else if (currentLoadCase == 1) then ! 1st load case of logarithmic scale if (inc == 1) then ! 1st inc of 1st load case of logarithmic scale timeinc = loadCases(1)%time*(2.0_pReal**real( 1-loadCases(1)%incs ,pReal)) ! assume 1st inc is equal to 2nd else ! not-1st inc of 1st load case of logarithmic scale timeinc = loadCases(1)%time*(2.0_pReal**real(inc-1-loadCases(1)%incs ,pReal)) endif else ! not-1st load case of logarithmic scale timeinc = time0 * & ( (1.0_pReal + loadCases(currentLoadCase)%time/time0 )**(real( inc,pReal)/& real(loadCases(currentLoadCase)%incs ,pReal))& -(1.0_pReal + loadCases(currentLoadCase)%time/time0 )**(real( inc-1 ,pReal)/& real(loadCases(currentLoadCase)%incs ,pReal))) endif endif timeinc = timeinc * real(subStepFactor,pReal)**real(-cutBackLevel,pReal) ! depending on cut back level, decrease time step skipping: if (totalIncsCounter <= interface_restartInc) then ! not yet at restart inc? time = time + timeinc ! just advance time, skip already performed calculation guess = .true. else skipping 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 write(6,'(/,a)') ' ###########################################################################' write(6,'(1x,a,es12.5'//& ',a,'//IO_intOut(inc)//',a,'//IO_intOut(loadCases(currentLoadCase)%incs)//& ',a,'//IO_intOut(stepFraction)//',a,'//IO_intOut(subStepFactor**cutBackLevel)//& ',a,'//IO_intOut(currentLoadCase)//',a,'//IO_intOut(size(loadCases))//')') & 'Time', time, & 's: Increment ', inc, '/', loadCases(currentLoadCase)%incs,& '-', stepFraction, '/', subStepFactor**cutBackLevel,& ' of load case ', currentLoadCase,'/',size(loadCases) write(incInfo,& '(a,'//IO_intOut(totalIncsCounter)//& ',a,'//IO_intOut(sum(loadCases%incs))//& ',a,'//IO_intOut(stepFraction)//& ',a,'//IO_intOut(subStepFactor**cutBackLevel)//')') & 'Increment ',totalIncsCounter,'/',sum(loadCases%incs),& '-',stepFraction, '/', subStepFactor**cutBackLevel flush(6) !-------------------------------------------------------------------------------------------------- ! forward fields do field = 1, nActiveFields select case (loadCases(currentLoadCase)%fieldBC(field)%ID) case(FIELD_MECH_ID) call FEM_mech_forward (& guess,timeinc,timeIncOld,loadCases(currentLoadCase)%fieldBC(field)) end select enddo !-------------------------------------------------------------------------------------------------- ! solve fields stagIter = 0 stagIterate = .true. do while (stagIterate) do field = 1, nActiveFields select case (loadCases(currentLoadCase)%fieldBC(field)%ID) case(FIELD_MECH_ID) solres(field) = FEM_mech_solution (& incInfo,timeinc,timeIncOld,loadCases(currentLoadCase)%fieldBC(field)) end select if(.not. solres(field)%converged) exit ! no solution found enddo 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 write(6,'(/,a)') ' cut back detected' cutBack = .True. stepFraction = (stepFraction - 1) * subStepFactor ! adjust to new denominator cutBackLevel = cutBackLevel + 1 time = time - timeinc ! rewind time timeinc = timeinc/2.0_pReal else ! default behavior, exit if spectral solver does not converge call IO_warning(850) call quit(-1*(lastRestartWritten+1)) ! quit and provide information about last restart inc written endif else guess = .true. ! start guessing after first converged (sub)inc timeIncOld = timeinc endif if (.not. cutBack) then if (worldrank == 0) write(statUnit,*) totalIncsCounter, time, cutBackLevel, & solres%converged, solres%iterationsNeeded ! write statistics about accepted solution endif enddo subStepLooping cutBackLevel = max(0, cutBackLevel - 1) ! try half number of subincs next inc if (all(solres(:)%converged)) then convergedCounter = convergedCounter + 1 write(6,'(/,a,'//IO_intOut(totalIncsCounter)//',a)') & ! report converged inc ' increment ', totalIncsCounter, ' converged' else notConvergedCounter = notConvergedCounter + 1 write(6,'(/,a,'//IO_intOut(totalIncsCounter)//',a)') & ! report non-converged inc ' increment ', totalIncsCounter, ' NOT converged' endif; flush(6) if (mod(inc,loadCases(currentLoadCase)%outputFrequency) == 0) then ! at output frequency write(6,'(1/,a)') ' ... writing results to file ......................................' call CPFEM_results(totalIncsCounter,time) endif if ( loadCases(currentLoadCase)%restartFrequency > 0 & ! writing of restart info requested ... .and. mod(inc,loadCases(currentLoadCase)%restartFrequency) == 0) then ! ... and at frequency of writing restart information restartWrite = .true. ! set restart parameter for FEsolving lastRestartWritten = inc ! first call to CPFEM_general will write endif endif skipping enddo incLooping enddo loadCaseLooping !-------------------------------------------------------------------------------------------------- ! report summary of whole calculation write(6,'(/,a)') ' ###########################################################################' write(6,'(1x,'//IO_intOut(convergedCounter)//',a,'//IO_intOut(notConvergedCounter + convergedCounter)//',a,f5.1,a)') & convergedCounter, ' out of ', & notConvergedCounter + convergedCounter, ' (', & real(convergedCounter, pReal)/& real(notConvergedCounter + convergedCounter,pReal)*100.0_pReal, ' %) increments converged!' flush(6) close(statUnit) if (notConvergedCounter > 0) call quit(2) ! error if some are not converged call quit(0) ! no complains ;) end program DAMASK_FEM